Symmetrix Dmx-4 Functionality_ce_student Resource Guide

Copyright © 2007 EMC Corporation. Do not Copy - All Rights Reserved.

Symmetrix DMX-4 Functionality - 1

© 2007 EMC Corporation. All rights reserved.

Symmetrix DMX-4Symmetrix DMX-4

V1.0

Welcome to DMX-4 training with a focus on hardware.

The AUDIO portion of this course is supplemental to the material and is not a replacement for the student notes accompanying this course.

EMC recommends downloading the Student Resource Guide from the Supporting Materials tab, and reading the notes in their entirety.

Copyright © 2007 EMC Corporation. All rights reserved.

These materials may not be copied without EMC's written consent.

EMC believes the information in this publication is accurate as of its publication date. The information is subject to change without notice.

THE INFORMATION IN THIS PUBLICATION IS PROVIDED “AS IS.” EMC CORPORATION MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WITH RESPECT TO THE INFORMATION IN THIS PUBLICATION, AND SPECIFICALLY DISCLAIMS IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

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All other trademarks used herein are the property of their respective owners.



© 2007 EMC Corporation. All rights reserved. Symmetrix DMX-4 Functionality - 2

Course OverviewCourse Description– This course discusses the new Symmetrix DMX-4 hardware in

relationship with the complementary Enginuity 5772+ code. .

Intended Audience – This course is intended for people who provide support for the DMX

line of products, especially those who require specific details on installation, configuration, SymmWin, and Inlines.

EMC believes the information in this publication is accurate as of its publication date and is based on PreGA product information. The information is subject to change without notice. For the most current information, see the EMC Support Matrix and the product release notes in Powerlink.

Here is the course overview and intended audience. Please take a moment to review them.




Course Objectives Upon completion of this course, you will be able to:

List the key reasons why customers should choose Symmetrix DMX-4

Identify where Symmetrix DMX-4 performance gains are derived from

Explain the functionality of the various power components within the DMX-4

Motivate why Stiletto DAEs and SATA drives have been implemented in the DMX-4 system

Define what power related enhancements have been made

The objectives for this course are shown here. Please take a moment to read them.




Module 1: DMX-4 OverviewUpon completion of this module, you will be able to:

List the key reasons why customers should choose Symmetrix DMX-4

Identify where Symmetrix DMX-4 performance gains are derived from

The objectives for this module are shown here. Please take a moment to read them.



© 2007 EMC Corporation. All rights reserved. Symmetrix DMX-4 Functionality - 5 5

Why Symmetrix DMX-4? Information availability

Tiered-storage consolidation

Performance enhancements

Application integration and qualification

Power efficiency

Built-in information-centric security (RSA)

The Symmetrix DMX-4 is the most advanced and widely deployed business continuity platform with unique capabilities like non-disruptive upgrades, multi-site disaster recovery, and enterprise consistency. It has the unique ability to tier different drive types within the array, allowing for massive consolidation, up to 1 PetaByte.

Due to the Symmetrix processing power and amount of memory, high levels of predictable performance is available for the most demanding applications.

Application integration includes $20 million in EMC equipment at Microsoft labs, more than 50,000 joint installations with Oracle, and more than 20 Engineering projects with SAP.

Meanwhile Symmetrix DMX-4 systems consume less power, placing lower demands on data center cooling equipment.

And to in order to secure people, infrastructure, and data, new built-in capabilities, including RSA integration, provide industry leading information-centric security.




DMX-4 950 Scalability – Quick OverviewPhysical packaging – Standard 40U height rack– Service Processor and KVM– Battery Backup Units

6 Slot card cage– 2 Memory Directors– 2 Front-end / Back-end Adapters– 2 or 4 I/O director boards (DF)– DF = ½ back-end and ½ front-end

Scalable capacity– Minimum 32 drives– System Bay only: 120 drives max– With Storage Bay: 360 drives max

Storage Bay

(Optional)

System Bay

(Standard)

Packaging: The Symmetrix DMX-4 950 system uses a modular design approach with a 6-slot card cage that will support two or four directors. Each card cage has up to four front-end ports and four backend ports, and two global memory directors and two FEBE boards. The System Bay is supported by dual and redundant 1,800 watt power supplies, backed up by two Standby Power Supplies. The service processor is dedicated to one (1) DMX-4 950 only and is operated through a built-in KVM (Keyboard, Video, and Mouse) that comes standard with every system.

DMX-4 950 Capacity:

The Storage Bay supports Disk Array Enclosures (DAEs) with up to 15 disk drives, including drive logic, power, and cooling elements. The Symmetrix DMX-4 950 System Bay supports up to 120 directly connected drives when two DA-pairs are configured. With the addition of one Storage Bay, up to 240 drives are supported with a single level of daisy-chaining and up to 360 drives are supported with a second level of daisy-chaining. A fully configured system has a raw capacity of over 173 TB.




DMX-4 Performance Gains Most of the Symmetrix DMX-4 performance gains come from enhancements to Enginuity 5772

Symmetrix DMX-3 customers who upgrade to the latest version of Enginuity 5772 will realize much of the same performance that Symmetrix DMX-4 customers will experience

Some benefits are attributed to the new hardware– Back-end and bandwidth

Performance gains can be up to 30 percent and largely depend on the storage workloads deployed in the system

The Symmetrix DMX-4 is based on the latest version of Enginuity 5772, a Service Release known as 5772+, which has been optimized for maximum performance and flexible tiered storage functionality.

Enginuity 5772+ provides investment protection that delivers performance gains for the Symmetrix DMX-4, along with security advancements via integration with RSA enVision, providing additional information-centric security features. The Symmetrix DMX-4, Enginuity 5772+, replication, and security activities are easy to manage with Symmetrix Management Console (SMC).




DMX-4 Performance – Bandwidth and Memory

Expanded and improved architecture– Higher throughput (1 Gb/s links)– Increased I/O performance (four dual 1.3 GHz PPC processors/Dir)

Bandwidth depends on the number of memory boards installed

DMX architecture has been expanded and improved to support the massive scalability of DMX-4 configurations, allowing for higher throughput.

As with DMX-3 models, the system’s bandwidth depends on the total number of memory boards installed.

Graphic note (a): 256 GB effective




DMX-4 Back-end Improvements – SATA and 4Gb/sThe Symmetrix DMX-4 delivers immediate support for the latest generation of disk drive technologies– New low-cost 500 GB (gigabyte) SATA II disk drives– Can reduce energy consumption by up to 33 percent

Symmetrix DMX-4 is the first and only high-end storage system that can support both high speed Fibre Channel and SATA disk drives disk drive technologies– 4 Gb/s Fibre Channel drives for high performance – SATA II for high capacity

End-to-end 4 gigabit-per-second (Gb/s) architecture

The new Symmetrix DMX-4 system is the next generation in the Symmetrix DMX series, and extends EMC's leadership in the high-end enterprise storage market.

The Symmetrix DMX-4 delivers immediate support for the latest generation of disk drive technologies: 4 Gb/s Fibre Channel drives for high performance and SATA II for high capacity.

Symmetrix DMX-4 is the first and only high-end storage system that can support both of these latest generations of disk-drive technologies.




DMX-4 Back-end Improvements - TroubleshootingPoint-to-point Fibre Channel back end– Advanced disk isolation capabilities to improve serviceability

New back-end has an independent relationship with each drive on the loop– To speed up problem isolation and improve serviceability

Dedicated relationship between a back-end controller and each disk drive also allows Symmetrix DMX-4 to analyze drive health prior to adding new disks to an existing configuration– Symmetrix DMX-4 will not add a faulty drive to an existing loop

A new 4 Gb/s point-to-point back-end makes it easier to isolate and diagnose disk drive errors toimprove serviceability. This is possible due to the point-to-point Fibre Channel back-end which has an independent relationship with each drive on the loop.




Module SummaryKey points covered in this module:

There are a number of key reasons why customers should choose Symmetrix DMX-4– Power efficiency: Symmetrix DMX-4 systems are power efficient,

placing lower demands on data center cooling equipment– Security: New built-in capabilities, including RSA integration, provide

industry leading information-centric security– The Symmetrix DMX-4 delivers immediate support for the latest

generation of SATA II disk drive technologies

Most of the Symmetrix DMX-4 performance gains come from enhancements to Enginuity 5772

New Point-to-point Fibre Channel back-end has an independent relationship with each drive on the loop

These are the key points covered in this module. Please take a moment to review them.




Module 2: ConfigurationsUpon completion of this module, you will be able to:

Summarize the configuration rules and guidelines to be considered when planning for a new DMX-4 or upgrading an existing DMX-4

List the drive capacities and volume type support for DMX-4 systems





Lesson 1: Configuration RulesUpon completion of this lesson, you will be able to:

Summarize the configuration rules and guidelines to be considered when planning for a new DMX-4 or upgrading an existing DMX-4

The objective for this lesson is shown here. Please take a moment to read it.




Configuration Rules – Drive CountLimitation 5771 (current): 2,400 drives

Limitation 5772 (current): 960 Drives

Limitation 5772+ 2,400 drives(*)– Minimum of 96 drives

(*): Rules apply, depending on volume protection– 2,400 maximum with RAID-1 (mirrored) protection– 2,400 maximum with RAID-5 protection– 2,080 maximum with RAID-6 protection

These are the configuration rules for the drive count.




DMX-4 Configurations

The Symmetrix DMX-4 base configurations are composed of a system bay and independent storage bays, that have common configuration guidelines. Any DMX-4 base configuration accommodates the later addition (upgrade) of capacity through the on-line addition of drives, drive enclosures, if required, and additional storage bays that support up to 2,400 2 Gb/s disk drives. The Direct Matrix™infrastructure accommodates non-disruptive addition of disk directors (increasing from two to eight disk directors) enabling increased capacity when needed.

The DMX-4 consists of a system bay and from one to eight storage bays. The DMX-4 system bay has from two to eight disk directors, up to 12 channel directors (combined director total 16), and two, four, six, or eight global memory directors. The system bay also contains up to eight power supplies, each of which has a dedicated 2.2 kW BBU.




DIR1

Slot0

BE

DIR2

Slot1

BE

DIR8

Slot7

FE

DIR3

Slot2

FE

DIR4

Slot3

FE

DIR5

Slot4

BEor FE

DIR6

Slot5

BEor FE

DIR7

Slot6

FE

DIR9

Slot8

FE

DIR10

Slot9

FE

DIR16

SlotF

BE

DIR11

SlotA

BEor FE

DIR12

SlotB

BEor FE

DIR13

SlotC

FE

DIR14

SlotD

FE

DIR15

SlotE

BE

M2

Slot

12

M0

Slot

10

M4

Slot

14

M5

Slot

15

M6

Slot

16

M7

Slot

17

M3

Slot

13

M1

Slot

11

DMX-4 1500-4500 Card Cage – Board Layout

This figure indicates the 24 slot positions in the card cage and which board occupies each position.

There are a total of 16 directors. Eight on the far left (1-8) and eight on the far right (9-16).

Eight cache boards are indicated in positions M0 through M7. Notice that the slide indicates the Global Memory Pairs.

Global Memory pairs reside next to each other.

Director positions 5, 6, 11 and 12 are universal, allowing either back-end or front-end directors to populate those positions.




Front-end ConnectivitySupports ESCON and FICON host connectivity to mainframe systems

Connects to Fibre Channel and iSCSI open system host interfaces

Users are able to connect Symmetrix systems through Fibre Channel to the IBM iSeries 270 and 8xx models– When using directly connected fibre devices (point-to-point) the

maximum distance is 500 meters– Fibre Channel is currently capable of running up to 4 Gb/s full duplex

with iSeries system

The Symmetrix DMX-4 supports ESCON and FICON host connectivity to mainframe systems

Fibre Channel and iSCSI host interfaces connect Symmetrix DMX-4 systems to Open System hosts such as UNIX, Windows, Linux, and iSeries servers. The DMX-4 systems support 4 Gb/s Fibre Channel connectivity to the IBM iSeries systems.




DMX-4 Configuration Rules and GuidelinesA minimum of four (4) disk drives must be configured in each drive enclosure– 5 GB on the first 4 drives of every drive loop (160 GB per disk

director pair) is reserved for memory vaulting– Drives with Vault partitions are required on each drive loop in the

direct-attached storage bay

While all drives (different capacities and/or different speeds) can be intermixed in Symmetrix DMX-4 systems, locations on disk director pairs and drive loops may affect application performance

Symmetrix systems support various data protection methods: RAID-1, RAID-10, RAID-5 (3+1) or RAID 5 (7+1), RAID-6 (6+2) or RAID-6 (14+2), SRDF, Dynamic sparing, and Permanent sparing

Listed here are the DMX-4 configuration rules and guidelines to be considered when planning for a new DMX-4 or upgrading an existing DMX-4.

Although all kinds of drives with different capacities and/or different speeds can now be intermixed in Symmetrix DMX-4 systems, locations on disk director pairs and drive loops may affect application performance.

As with DMX-3 systems running 5772 code, Symmetrix DMX-4 supports various data protection methods.

Note: In summary, these forms of data protection are:

- RAID 1: Mirrored pairs of two hyper volumes

- RAID 10: Data striped across four mirrored pairs of hyper volumes for mainframe environments

- RAID 5 (3+1) or RAID 5 (7+1): Data striped on four or eight hyper volumes with rotating parity

- RAID 6 (6+2) or RAID 6 (14+2): Data striped on eight or sixteen hyper volumes with rotating parity

- SRDF: Data mirrored to another Symmetrix

- Dynamic sparing: Increases data availability by copying the data on a failing volume to a spare volume until the original device is replaced

- Permanent sparing: Replaces a faulty drive automatically from a list of available spares residing in the Symmetrix system without CE involvement on site




Lesson 2: Drive Type and Capacity SupportUpon completion of this lesson, you will be able to:

List the drive capacities and spare drive support for DMX-4 systems





DMX-4 Capacity Support73 GB, 146 GB, 300 GB, and 500 GB FC disk drives

500 GB SATA II disk drives

The following factors affect customer storage capacity: – Drive capacity size– Type of data protection options used– Internal Symmetrix File System (SFS) usage (2x 6,140 cyl.,

consuming 24 GB)– Block size (512 or 520 bytes per block)– Vault devices (vaulting data from global memory; requires 160 GB

for each pair of disk directors)

Besides the Fibre Channel (LC-FC) drive storage capacities ranging from 73 GB to 500 GB, DMX-4 can also be configured with SATA II drives, as a whole or in part (that is, intermixed FC and SATA).

Considering the SATA II 500 GB drive has the same capacity as the largest Fibre Channel drive, the total system capacity theoretically should max out the same way, with each storage bay containing 240 drives.

However, keep in mind that the there was a limitation of 960 drives maximum with the current 5772. This restriction has been lifted with 5772+, bringing the maximum amount of drives back to 2,400 similar to Enginuity 5771.




Spare Drives Policy2 per 100 per drive type with a minimum of 8

Sparing rules will be enforced– There will be NO way to allow override

DMX-3 sparing will remain unchanged – No impact with 5772+

Will allow sparing across quadrants– 4 Gb/s drives can act as 2 Gb/s spares (same speed [rpm])– 2 Gb/s drives can act as 4 Gb/s spares (same speed [rpm])

The sparing rules have changed in 5772+, affecting the spare drive requirements in such ways that when installing a DMX-4, spare drives are mandatory. This is a deviation from 5772 and below, where spare drives were recommended, yet the rules were not enforced.

Loading a configuration (BIN) file without the minimum amount of spare drives as calculated by CPQO and SymmWin will result in a red box during the upgrade procedure and the inability to successfully complete the install.

In order to avoid major impacts to customers, where a configuration change would be required to add spares if possible at all (due to unavailability of drive slots), DMX-3 sparing will remain unchanged (no impact) when upgrading to 5772+.

Please note the sparing across quadrants remark. Due to the little impact that is expected with 2 Gb/s versus 4 Gb/s, the 4 Gb/s drives can act as 2 Gb/s spares, and the 2 Gb/s drives can act as 4 Gb/s spares, as long as the replacing drive has the same speed (7,200, 10k, or 15krpm)




Disk Devices 950 Model

The Symmetrix DMX-4 uses industry-standard 4 Gb/s Fibre Channel disk drives for physical disk devices.

The disk drives are installed in the front of storage bays and connect to a midplane. Each disk drive is integrated with a dual-port Fibre Channel Arbitrated Loop (FC-AL) controller with Fibre Channel interface that transports SCSI protocol.

The Symmetrix DMX-4 supports Fibre Channel loops ranging from 15 drives to 60 drives per loop.




Lesson 3: Volume SupportUpon completion of this lesson, you will be able to:

State the number of partitions that can be configured on each physical drive based on the type of volume protection





Symmetrix DMX-4 Logical Volume Count

The maximum number of logical volumes supported on Symmetrix DMX-4 physical disk devices depends on the data protection used

Based on the type of volume protection, a specific number of hypers (partitions) can be configured on each physical drive.

The list given here shows the correlation between the RAID or SRDF protection and the maximum number of hypers allowed for.




DMX-4 Logical Volumes System Support

The Symmetrix DMX-4 can support up to 64,000 logical volumes (not 64k volumes as in 64 x 1,024), depending on the number of disk directors, the type of data protection, and hardware configuration. This table shows the maximum logical volumes supported on DMX-4 systems by the number of drives, DA boards, and type of data protection employed.




DMX-4 Logical Volumes System Support (Cont.)

The logical volume limit is a function of:– The number of disk directors– Disk drives– Enginuity level– Data protection type

For configurations above 1,920 drives (up to 2,400 drives), more info will be available upon General Availability date.

This listing shows the maximum logical volumes available for the Symmetrix DMX-4 with the number of disk drives stated and a homogeneous protection scheme on those disk drives.

The logical volume limit is a function of the number of disk directors, disk drives, Enginuity level, and data protection type.





Symmetrix DMX-4 base configurations are composed of independent storage bays with common configuration guidelines

Although drives with different capacities and/or different speeds can now be intermixed in Symmetrix DMX-4 systems, locations on disk director pairs and drive loops may affect application performance

Spare drives are mandatory on a DMX-4 with 5772+

DMX-4 supports up to 64,000 logical volumes per system and 255 partitions per drive– Depending on the number of disk directors, the type of data protection, and

hardware configuration





Module 3: InstallationUpon completion of this module, you will be able to:

Describe the System Bay and Storage Bay components of the DMX-4 950 (6-slot) and DMX-4 1500-4500 (24-slot) Symmetrix models

The objective for this module is shown here. Please take a moment to read it.




Lesson 1: DMX-4 950Upon completion of this lesson, you will be able to:

Describe the System Bay and Storage Bay components of the Symmetrix DMX-4 950 model





Drive enclosures

BBU 2.4 kW

KVMCard Cage

Enclosure

BBU 2.4 kW

Drive enclosures

Drive enclosures

BBU 2.4 kW

Drive enclosures

ServerUPSFiller

950 System Bay – FrontUp to 8 drive enclosures (DAEs) w/ 2 DA pair– 8x 15 drives/DAE

3x Battery Backup Unit– 2x for 8 DAEs– 1x for Card Cage (SPE)

Server and KVM (and modem) protected by UPS– Located above unused filler

The DMX-4 950 systems are scalable with limited configurations .

It can be composed of a System Bay only or as a multi-bay disk subsystem with one System Bay and one Storage Bay.

Smaller configurations, those with 120 drives or less, do not require the Storage Bay expansion.

The DMX-4 950 6 slot system is mounted in a Titan 19” NEMA rack.




950 System Bay – Rear2x Power Distribution Unit (PDU)

Different Battery Backup Units (BBU)– 3x 2.4 kW (DAE and

SPE)

All FEBE connections– ½ Back-end ports

(DAEs)– ½ Front-end ports

(hosts/RDF)

Drive enclosures

BBU 2.4 kW

Drive enclosures

ServerUPS

KVM

Filler

Drive enclosures

Card Cage Enclosure

Power supplies (2) 1950W

BBU 2.4 kW

PDU

PDPDrive enclosures

BBU 2.4 kW

The DMX-4 950 configuration is similar to the current design of the DMX-3 950 and the DMX800, a DMX or DMX-2 6 slot system also known as RMS (Rack Mounted Symmetrix).

The system includes use of an Uninterruptible Power Supply (UPS) to provide battery power to the Server, KVM (Keyboard, Video, Mouse), and Modem, should the AC input power to both zone A and B be disrupted.




950 Storage Bay – Rear

From the rear, Power Zone A is on the right side of the cabinet

From the rear, Power Zone B is on the left side of the cabinet

There are two (2) PDUs, one on each side

There are two (2) PDPs, one on each side

Similar to the System Bay, the Storage Bay requires two (2) AC input lines from the customer.

These AC line feeds supply power to the different power zones through the Power Distribution Panel (PDP) to the Power Distribution Unit (PDU).

More details on these components are presented in following modules.




Lesson 2: DMX-4 1500-4500Upon completion of this lesson, you will be able to:

Describe the System Bay and Storage Bay components of the Symmetrix DMX-4 1500 to 4500 models





Symmetrix DMX-4 Configurations

This figure provides a front view of the exterior of a Symmetrix DMX-4

Configured with one system bay in the middle, surrounded by eight storage bays– Four (4) on each side

The DMX-4 consists of a single system bay and from one to eight storage bays.

The system bay contains the 24-slot card cage, service processor, power modules, and battery backup unit (BBU) assemblies.

The storage bays contain disk drives and associated BBU modules. In a highly scalable component and cabinet configuration, the DMX-4 has the capacity, connectivity, and throughput to handle a wide range of high-end storage applications.




Symmetrix DMX-4 System BayNote (*): The Service Processor consists of the KVM and the server

Note (**): The Battery Backup Unit Assembly consists of two Battery Backup Unit Modules

Front Rear

The DMX-4 consists of one (1) system bay and multiple storage bays.

The system bay consists of a card cage with channel directors, disk directors, memory directors, and communication modules.

In addition, system bay consists of a Service Processor and a number of power modules (Power Distribution Panel, Battery Backup Unit, and power supplies).




DMX-4 System Bay ComponentsCard cage and midplane – The front 24 slots contain global memory directors, disk directors,

and channel directors – The rear slots contain the front-end/back-end adapters, and XCM

Channel Directors/Adapters and SRDF Adapters– Up to 12 channel directors (Front-End)

Fibre Channel Disk Directors/Adapters– Two, four, six or eight disk directors (Back-End)

The front of the 24-slot card cage contains global memory directors, disk directors, and channel directors (front-end) Fibre Channel, ESCON, FICON, and iSCSI channel directors a, and/or GigE Remote directors). The rear slots contain the channel host adapters, GigE Remote adapters, disk adapters, and the Communications and Environmental Control Modules (XCMs).

Up to 12 channel directors connect to the front side of the midplane and the adapters to the rear side of the midplane in the system cabinet. Each channel director’s adapter provides the interface to the host or network.

Two, four, six or eight Fibre Channel disk directors connect to the midplane in the front of the cabinet. Each disk director’s adapter provides the interface to the Fibre Channel disk drives. The adapter connects to the opposite side of the midplane in the rear of the cabinet.




DMX-4 System Bay Components (Cont.)Global Memory (GM) Directors – Two, four, six, or eight global memory directors

Service Processor– KVM (Keyboard, Video Display, and Mouse), server, and

Uninterruptible Power Supply (UPS)

XCM– Communications and Environmental Control Module– Contains Ethernet interface between all directors, memory, and

service processor– Monitors environmental events for all Symmetrix DMX-4 FRUs

Global Memory (GM) Directors are two, four, six, or eight global memory directors that provide up to 512 GB (256 GB effective) total global memory.

Memory boards are available in 8 GB, 16 GB, 32 GB, and 64 GB capacities.

XCM is the Communications and Environmental Control Module, connecting to the midplane in the rear card cage.

The XCM contains the Ethernet interface between the directors (channel, disk, and memory) and the service processor and monitors environmental events for all Symmetrix DMX-4 FRUs (field replaceable units), reporting any operational problems such as thermal excursion, voltage drop, etc.




DMX-4 System Bay Components (Cont.)Power Distribution Panel (PDP)– Power Distribution Unit (PDU), and AC connectors.

Battery Backup Unit (BBU)– Assembly consisting of two BBU modules

Cooling fan modules– Three 3-fan modules

Two PDPs (Power Distribution Panel), one for each zone, provide a centralized cabinet interface and distribution control of the AC power input lines when connected to the system bay PDUs. The PDPs contain the manual On/Off power switches, which are accessible through the rear door. The PDUs, one for each power zone, provide the main interface between the input AC from the PDPs and the various components contained within the system bay.

Up to eight 2.2 kW BBU modules provide backup for each of the power supplies. If AC power fails, the BBU modules can maintain power for two 5-minute periods of AC loss while the Symmetrix system shuts down.

Three 3-fan modules maintain air circulation and cool the unit internally.




Symmetrix DMX-4 Storage Bay

Each storage bay is configured with either 120 or 240 disk drives.

All storage bays are similar except for the bays 1A and 1B, the bays closest to the system bay in the middle.




Storage Bay ComponentsDrive enclosures– Includes power supplies, Link Control Cards, and up to 15 disk

drives per drive enclosure

Two BBU modules– Required for four drive enclosures – 2.2 kW BBU modules– Provide backup power to the drive enclosures

Two PDPs– One for each zone– PDPs contain the manual On/Off power switches

Each drive enclosure includes redundant power and cooling modules for disk drives, two Link Control Cards (LCC), and from 4 to 15 Fibre Channel disk drives per drive enclosure.

The storage bays can be populated with any combination of DMX disk drives

- 73 GB, 146 GB, and 300 GB 10,000 rpm drives

- 73 GB and 146 GB 15,000 rpm drives

- 500 GB 7,200 rpm drives

Two BBU modules are required for four drive enclosures (hence up to eight BBU modules support up to 16 drive enclosures in one storage bay).

The 2.2 kW BBU modules provide backup power to the drive enclosures. Two PDPs, one for each zone, provide a centralized cabinet interface and distribution control of the AC power input lines when connected to the storage bay PDUs. The PDPs contain the manual On/Off power switches, which are accessible through the rear door. The PDUs, one for each power zone, provide the main interface between the input AC from the PDPs and the BBU modules to the drive enclosures contained within the storage bay.





The DMX-4 models have the same numbers as the DMX-3 family– DMX-4 950 and DMX-4 1500 - 4500

Compared with DMX-3 systems, the DMX-4 System Bay and Storage Bays look similar, yet have some different components





Module 4: Back-endUpon completion of this module, you will be able to:

Explain how the DMX-4 next generation Stiletto compares with a Katina disk enclosure in a DMX-3

Motivate the reason SATA drives are implemented in Symmetrix system

Summarize the SATA support configuration rules





Lesson 1: Stiletto DAEUpon completion of this lesson, you will be able to:

Explain how the DMX-4 next generation Stiletto compares with a Katina disk enclosure in a DMX-3





Why Stiletto Implementation?Next generation Disk Array Enclosure

Supports up to 15 disk drives

The Fibre Channel loop is directed via a Cut Through Switch (CTS) device– CTS provides point to point connection to every drive – Provides improved isolation of error conditions

Stiletto operates at higher speed than Katina/Katana– Stiletto: 2Gb/s or 4Gb/s loop speeds– Katina: 2Gb/s loop speed only

Stiletto is the next generation Disk Array Enclosure (DAE).

It supports up to fifteen low-profile Fibre Channel disk drives, two Link Controller Cards (LCCs) and two Power Supply/Cooling modules.

The Fibre Channel loop is directed via a Cut Through Switch (CTS) device that provides a point to point connection to each drive.

This feature provides better isolation of error conditions and can operate at 2Gb/s or 4Gb/s loop speeds.




Stiletto UltraPoint-2 Technology2nd Generation port-switched 4Gb FC back-end

Point-to-Point connectivity between disk drives and DA ports– Replaces Fibre Channel Arbitrated Loops in

current DMX

Enables Enginuity to identify, isolate and resolve drive issues faster

Facilitates transition to 4Gb/s disk drives

DA

por

t AD

A p

ort B

UltraPoint was pioneered by CLARiiON in 2005, leveraging shared technology and components.

It enables new low-cost, high-capacity SATA drives, operating at 4Gb/s speed.




DAE Backend Speed DMX-3 and earlier models back-end speeds of DA’s to the physical disks is constant 2 Gb/s

Now for DMX-4, back-end speeds of 4 Gb/s are supported with Stiletto DAEs

Speed, however, is reported on a per DA-port basis– Configuration needs to support 4 Gb/s disks.– Only disks capable of supporting 4 Gb/s speed should be attached to

these DA’s– Entire DA will speed down to 2 Gb/s if even a single disk does not

support the 4 Gb/s speed

For Symmetrix arrays of type DMX-3 or earlier, the backend speeds of DA’s to the physical disks was a constant 2 Gb/s.

When the hardware is being configured, disks that are capable of supporting this 4 Gb/s speed are only ones that should be attached to these DA’s

If even a single one of the disks does not support the 4 Gb/s speed, the entire DA will necessitate the speed down to 2 Gb/s




Stiletto Views

1. Enclosure Power

2. Enclosure Fault

3. Drive Power

4. Drive Fault

5. Power Supply B

6. LCC B

7. LCC A

8. Power Supply A

12

4

3

5

8

67

These graphic show the various components of which the Stiletto exists of.

Numbers 1 to 4 relate to the front of the Disk Array Enclosure (DAE), while numbers 5 to 8 point out the components in the rear of the DAE.

Multiple power supplies and link control cards (LCC) are used to avoid single point of failure.




Stiletto Views (Cont.)

DAEs populated with 73GB 15krpm 4Gb/s drives– Part number 101-000-004

The drives are clearly marked with their capacity, speed, part number, and serial number.

In this case 73 GB, 4 Gb/s, 15krpm drives are shown.




Katina Port Bypass Device – DMX/DMX-2/DMX-3

Signal integrity/protocol issues at drive port propagate to other drives on the same loop– Single failing drive can cause failure to other drives on the same

back-end loop

No hardware support available to diagnose these faults

With the Katina Port Bypass Card (PBC) in the DMX-3 1500-4500, or Link Control Card (LCC) in the DMX-3 950 model, signal integrity and protocol issue at a drive port will propagate to other drives in the loop.

A single failing drive could therefore cause other drives on the same backend loop to fail.

There is no hardware support to diagnose or isolate those faults.




Stiletto Cut Through Switch – DMX-4

CTS ( Cut Through Switch ) point to point technology adds port monitoring capability to each drive port

Performance increases by avoiding passing data through every drive in the loop

Switching Logic

CTS ( Cut Through Switch ) point to point technology adds port monitoring capability to each drive port, allowing for better fault detection and isolation.

Performance increases since the data does not have to be passed through every drive in the loop.




Stiletto Access - Drive on DAE-0

Stilettos have significant gain in signal integrity

Traffic traverses all the way to the last enclosure before returning to the DA port

Switching Logic Switching Logic

Pri.

Por

t

Pri.

Por

t

Exp

.Por

t

Exp

.Por

t

DAE-0 DAE-1

Point-to-point connections between LCC and drives guarantee Stilettos have a significant gain in signal integrity compared with Katina disk enclosures. As can be seen in this picture, the physical layout of LCCs provide shorter connections to each drive.

Traffic, however, has to traverse all the way to the last enclosure before returning to the DA port.




Stiletto - Better Fault Reporting ReliabilityCTS device in Stiletto provides diagnostic data on each port– Data counters track errors the CTS gets on its receive ports

During loop failures counter data can be analyzed– To detect and isolate the faulty component– Different types of components

Drives are tested before being added to the Back-end loop– Either during enclosure power up or drive replacement

The CTS device in the Stiletto provides diagnostic data on each port similar to the RLS counters on the FC disk drives

Data counters track errors the CTS gets on its receive ports

During loop failures counter data can be analyzed to detect and isolate the faulty component. This can be a drive, cable, or LCC.

Drives are tested before being added to the Back-end loop upon enclosure power up or drive replacement




Stiletto Support4Gb/s or 2Gb/s loops– 4Gb/s Stilettos populated with 4 Gb/s drives only

Speed implementation defined per quadrant only– No support for mixed configurations (4Gb/s and non-4Gb/s) in the

same quadrant

Stiletto speed change is an offline configuration change– Online script, yet offline during script

Stiletto does not support FC speed auto-negotiation

DMX will support Stiletto with 4Gb/s or 2Gb/s loops

4Gb/s Stilettos need to be populated completely with 4 Gb/s drives only in order to operate in 4 Gb/s mode

4Gb/s drive implementation is restricted via Symmwin to quadrant onlyDMX will not support mixed configurations of 4Gb/s and non-4Gb/s drives in the same quadrant

Stiletto speed change is an offline configuration changeStiletto does not support FC speed auto-negotiation




Stiletto Support – SymmWin SetupSymmWin allow user to define the DA pairs as 4Gb/s or 2Gb/s

Step #1:Choose DirEdit from IMPL_Init (BIN-file)

Step #2: Right-click on the number ‘4’. – Choose ‘Set Back end loop speed’

Step #3: Select either 2Gb/s or 4Gb/s from the drop-down menu

1 2 3

SymmWin will allow the user to define the DA pairs as 4Gb/s or 2Gb/s.

By default the setting of the disk director ports are set to 4Gb/s. Use the directions as given in step 1 to 3 in order to change this setting to 2Gb/s.

All settings are applied to disk director pairs, representing the four (4) quadrants.




Inlines – FC,ENCL,DB,<port>,<mode>,<mode_num>

Enclosure presence

4Gig Stiletto

Power Supplies

BBU (SPS)

Drive presence

This ‘FC’ Inlines commands provides a health check of the back-end, including power supplies, drive presence, and battery back-up units (SPS).

No area within the display has been highlighted since almost all the fields are important and requires your attention to see if any setting deviates from ‘normal’.




Lesson 2: SATA DrivesUpon completion of this lesson, you will be able to:

Motivate the reason SATA drives are implemented in DMX-4 Symmetrix systems

Summarize the SATA support configuration rules

The objectives for this lesson are shown here. Please take a moment to read them.




Why SATA Drives?Low cost solution

High density drives

Good option for tiered storage

Common drive between DMX and CLARiiON products

Whereas previous generations of EMC Symmetrix Enginuity only supported Fibre channel drives, we now have a common drive between DMX and CLARiiON products by adding support of Northstar SATA drives into DMX-4.

These SATA drives are a low cost, high density option for tiered storage.




SATA SupportSATA drives can coexist with FC drive in the same enclosure

Should not mix SATA drives and Fibre drives in the same RAID group, otherwise the SATA drives will be a performance bottleneck for the whole group.– With SATA performance catching up with Blizzard, this restriction

may be eliminated

Performance consideration: Expect lower system performance when SATA drives are involved




SATA Related InlinesD0,BE,mdddd,INQV, page– Retrieve VPD page

D0,BE,mdddd,INQV,C0– Northstar firmware revision

D0,BE,mdddd,INQV,D0– SATA drive firmware revision

D0,BE,mdddd,LOGP,page– Retrieve LOG page

Existing drive utilities applicable SATA drives– D0 and D2 displays slightly modified

All existing drive related utilities can be applied to SATA drives.

D0 and D2 displays have been slightly modified to support SATA drives.




Solutions Enabler & SMC SATA Drive supportMicrocode does not give Solutions Enabler anything that specifically identifies a drive as being a SATA drive

However, SATA drives usually have an identifier that begins with the letters SATA that enables these drives to be identified– E.g. “SATAHGST” in the ‘Vendor [ID]’ column using the ‘symdisk’ or

‘symdisk show’ command

In SMC, you can select the disk in the Navigation Tree, and then similarly see the Vendor in the Properties view in the panel

Serial ATA (SATA) drives are supported in DMX-4 arrays. The “symdisk” commands work correctly on the SATA drives. The microcode does not give SE anything that specifically identifies a drive as being a SATA drive, but the SATA drives usually have an identifier that begins with the letters SATA that enables these drives to be identified. The “symdisk” CLI command shows “SATAHGST” under the Vendor type. Also this shows up as the Vendor ID in the “symdisk show” command display. In SMC, you can select the disk in the Navigation Tree, and then similarly see the Vendor in the Properties view in the panel.




4 Gb/s Backend Director - CLI outputInlines: FC,ENCL,POLL,<port>

Symcli: symcfg list -da all -v– Director Identification: DF-15B– Director Type : DISK– Director Status : Online– Director Symbolic Number : 15B– Director Numeric Number : 31– Director Slot Number : 15– Number of Serviced Hyper Volumes : 68– Director port 01 speed (Gb/Second) : 4– Director port 02 speed (Gb/Second) : 4

Inlines command FC,ENCL,POLL,<port> sends a POLL command to the enclosure(s).





DMX-4 Stiletto drive enclosures operate at higher speed (4Gb/s) than DMX-3 Katinas (2Gb/s) – Cut Through Switch provides point to point connection to every drive – Stiletto provides improved isolation of error conditions

SATA drives provide a low cost solution with high density drives– Used on both Symmetrix DMX-4 and CLARiiON

Speed implementation defined per quadrant only– No support for mixed speed configurations in the same quadrant– SATA drives can coexist with FC drive in the same enclosure

All existing fibre channel drive related utilities can be applied to SATA drives as well– Enginuity and Solution Enabler





Module 5: Channel DirectorsUpon completion of this module, you will be able to:

Paraphrase the availability of global memory directors in a DMX-4 system

List the variety of Fibre channel, GigE, and FICON functionality, intermixed on the same director board or as separate boards across the system

Summarize the various speeds and distances that can be obtained with the different front-end directors





Lesson 1: Connectivity SupportUpon completion of this lesson, you will be able to:

List the variety of Fibre channel, GigE, and FICON functionality, intermixed on the same director board or as separate boards across the system





DMX-4 Supported Protocols and Channel Directors

All channel directors contain four high performance processors

The Symmetrix DMX-4 supports up to 12 channel directors

Symmetrix DMX-4 channel directors are single boards that occupy one slot on the Symmetrix midplane, interfacing to host channels through interface adapter cards connected to the opposite side of the midplane. The Symmetrix DMX-4 supports up to 12 channel directors.

DMX technology is used across the Symmetrix system, as it is also designed into each global memory director.

In addition to DMX technology, each director includes support for a separate message matrix for the transfer of control information.

- Graphic note (a): Contact your local EMC Sales Representative for ESCON channel director and GigE Remote support availability.

- Graphic note (b): Usable ports are per qualified channel directors.




DMX-4 Channel Director Models and Descriptions

Note: MM = Multimode; SM = Single-mode

8-Port Fibre Channel as listed is used for front-end

All channel directors contain four high performance processors (slices) and can be loaded with different emulation codes, depending on the board type and the type of mezzanine (daughter) boards on the director boards.

This figure lists the possibilities of intermixing Fibre channel, GigE, and FICON on the same board, multi-mode (MM) and single-mode (SM).

Each channel director on the Symmetrix DMX-4 supports eight internal links to global memory.




Channel ConnectivityThe DMX-4 provides channel connectivity through combinations of mainframe systems and open systems channel directors:– Fibre Channel directors (host connect and SRDF)– ESCON directors (host connect and SRDF)– FICON (host connect only)– iSCSI (host connect only)– GigE (SRDF connect only)

Multi-protocol Channel Directors (MPCD) are available with mixed connection combinations

Mixed ESCON, FICON, Fibre Channel, and iSCSI interfaces supported

The Symmetrix DMX-4 supports mixed ESCON, FICON, Fibre Channel, and iSCSI interfaces. The Symmetrix DMX-4 supports open systems hosts such as UNIX systems, Linux systems, and Windows connectivity through Symmetrix Fibre Channel or iSCSI directors. (iSeries connectivity is only supported through Fibre Channel directors.) The Symmetrix DMX-4 supports mainframe connectivity through ESCON and FICON directors.

ESCON directors used for SRDF, data migration, and the Symmetrix Data Migration Service (SDMS) application.

GigE (Gigabit Ethernet) remote directors can only be used for SRDF, not for host (server) connection.

iSeries (IBM) connectivity is only supported through Fibre Channel directors




Fibre Channel Directors (FA)Addressing capabilities FA directors:

Each FA board contains four processors

Every processor services two channel paths

The actual limits allowed for customer environments will be lower and are dependent on the host type, HBA and driver type/version, and overall system implementation

The Fibre Channel front-end director has eight FC (ANSI compliant) 4 Gb/s Fibre Channel interfaces for connection to host systems, also configurable to 2 Gb/s and 1 Gb/s. The Symmetrix DMX-4 can support up to 8 qualified Fibre Channel directors.

The numerical values for Symmetrix devices stated in the table are the maximum allowed according to the architectural limits of the 5772+ code running on the Fibre Channel front-end director. The actual limits allowed for customer environments will be lower and are dependent on the host type, HBA and driver type/version, and overall system implementation.

Using meta-devices will reduce the number of host-visible volumes for a given number of devices (Symmetrix Devices) configured to the Fibre Channel front-end director. Each member of the meta-device will be counted to the allowed limit of devices configured to a Fibre Channel front-end director.




ESCON Channel Directors (EA)

The Symmetrix ESCON director can support up to 1,024 logical paths per port when only the A port of the processor is configured– 512 logical paths per port when both the A and B ports are configured

An eight-port, four-processor ESCON director connects to mainframe hosts, and provides the capability for four concurrent operations through its four physical interfaces for communicating with the serial channels in host systems.

The Symmetrix DMX-4 ESCON director has eight ESCON channel interfaces for connection to host systems and eight high-speed paths to global memory. The ESCON channel director interfaces to the host channels through an eight-port ESCON channel interface adapter and supports data transfer rates up to 17 MB/s per port. The Symmetrix ESCON director can support up to 1,024 logical paths per port when only the A port of the A and B ports of the processor is configured and up to 512 logical paths per port when both the A and B ports are configured.

The Symmetrix DMX-4 supports 2 to 10 ESCON channel directors.




ESCON Channel Attachments

ESCON (serial) channels use point-to-point or switched point-to-point links.

Each link has two physical fibers for transporting data: one for inbound signals and one for outbound signals.

There are two types of fiber optic cables: multimode and single-mode. Multimode cables support a maximum link of 1.86 miles (3 km).

Single-mode cables support a maximum link of 12.42 miles (20 km) with the Extended Distance Feature (XDF).

The Symmetrix system supports a maximum connection length of 26.7 miles (43 km) with two single-mode cables and one multimode cable.




FICON Channel Directors (EF)

The FICON mezzanine card provides up to four single-mode (SM) or multimode (MM) LC bidirectional (full duplex) connections

Symmetrix FICON channels transfer data at speeds up to 4 Gb/s

FICON channel directors support native mode point-to-point connections and FICON native mode switched point-to-point connections to IBM 9672, G5/G6, z/900, and z/990 systems running z/OS, z/VM, VM/ESA, and VSE/ESA operating systems.

FICON employs ESCON protocols that have been mapped to the FC-4 upper-level protocol layer of the Fibre Channel architecture.

It supports multiple concurrent I/O connections, channel program multiplexing, and better link utilization than ESCON path switching.

FICON allows the consolidation of multiple ESCON channels into one FICON channel.

The FICON mezzanine card provides up to four single-mode (SM) or multimode (MM) LC bidirectional (full duplex) connections.

Symmetrix FICON channels transfer data at speeds up to 4 Gb/s.

The Symmetrix DMX FICON design auto-detects 4 Gb/s, 2 Gb/s or 1 GB/s at switch or channel port login time.

The Symmetrix DMX-4 system supports up to eight FICON channel directors.




FICON Channel Attachments

This figure illustrates several types of FICON channel attachments. In addition to the standard direct-connect configuration, Symmetrix DMX-4 FICON models support the use of cascading and Open Systems Intermix configurations. Cascading can be used to reduce the number of FICON adapters and the amount of inter-site cabling required by making use of switch-to-switch communication. Intermix allows FICON zones to be added to existing Open Systems switches within a site and between sites. These two features help reduce the overall costs while providing greater FICON connectivity, backup, and recovery.

FICON cascading provides greatly enhanced FICON connectivity within local and remote sites through the use of switch-to-switch extensions of the CPU to the DMX FICON network. These cascaded switches communicate over long distances using a small number of high speed lines called ISLs (InterSwitch Links). Up to a maximum of two switches may be connected together within a path between the CPU and the DMX. Same switch vendors are required for a Cascaded configuration. The EMC and IBM branded McDATA and INRANGE switches are supported in pairs.

FICON Open Systems Intermix allows separate FICON zones to be defined within new or existing open systems switches. These switches can also be Cascaded to further enhance connectivity and remote backup and recovery. The EMC and IBM branded McDATA and INRANGE switches are supported. To support Open Systems Intermix, each vendor requires specific models, hardware and software features, configuration settings, and restrictions.




Gigabit Ethernet (RE) and iSCSI (SE) DirectorsSymmetrix DMX GigE remote channels for SRDF transfer data at speeds up to 1 Gb/s

The GigE director provides up to four 1 Gb/s Ethernet ports and connects via LC connectors– Compatible with Symmetrix DMX-2 and Symmetrix 8000 systems

The Symmetrix DMX-4 MPCD, through mezzanine card technology, supports iSCSI channel connectivity by way of Gigabit Ethernet (GigE) hardware for the Symmetrix DMX systems

The Symmetrix iSCSI director provides up to four 1Gb/s Ethernet ports

GigE remote mezzanine cards on the MPCD enable remote director functionality based upon Gigabit Ethernet technology that enable direct Symmetrix-to-IP network attachment and eliminate the need for expensive media converter appliances. GigE support for SRDF on Symmetrix DMX systems increases the options for Symmetrix-to-Symmetrix connectivity and allows the Symmetrix system to connect to your existing Ethernet infrastructure and directly access high-speed data transmission conduits via Internet Protocol (IP). SRDF traffic is supported to one or more remote Symmetrix systems that also have GigE remote directors installed, using TCP/IP protocols and function layers. Symmetrix DMX GigE remote channels for SRDF transfer data at speeds up to 1 Gb/s. The GigE director provides up to four 1 Gb/s Ethernet ports and connects via LC connectors.

The Symmetrix DMX-4 MPCD, through mezzanine card technology, supports iSCSI channel connectivity by way of Gigabit Ethernet (GigE) hardware for the Symmetrix DMX systems. The iSCSI channel director supports iSCSI channel connectivity to IP networks and to iSCSI-capable open systems server systems for block storage transfer between hosts and storage. The primary applications are storage consolidation and host extension for stranded servers and departmental workgroups. The Symmetrix iSCSI director provides up to four 1Gb/s Ethernet ports and connects via LC connectors. The iSCSI directors support the iSNS protocol, a mechanism that provides Naming and Discovery services for iSCSI initiators. The iSNS server information is configured in the Symmetrix IMPL file for each iSCSI director.




Global Memory DirectorsDMX-4 uses Double Data Rate Synchronous Dynamic Random-Access Memory (DDR SDRAM)

The DMX-4 global memory directors work in pairs– The hardware writes to the primary global memory director first, and

then automatically writes data to the secondary global memory director

Various directors sizes available– 8 GB, 16 GB, 32 GB, and 64 GB sizes

The Symmetrix DMX system can support up to eight slots dedicated to global memory (only) and 512 GB of global memory (256 GB effective)

Global memory directors must be configured in pairs of the same capacity

The Symmetrix DMX-4 global memory director technology is one of the most crucial components of a Symmetrix system. The DMX-4 uses global memory directors that use industry-standard Double Data Rate Synchronous Dynamic Random-Access Memory (DDR SDRAM), the latest generation of DDR SDRAM chip technology. All read and write operations transfer data to or from global memory. Any transfers between the host processor, channel directors, and global memory directors are achieved at much greater electronic speeds than transfers involving disks.

The DMX-4 global memory directors work in pairs. The hardware writes to the primary global memory director first, and then automatically writes data to the secondary global memory director. All reads are from the primary memory director. Upon a primary or secondary global memory director failure, all directors drop the failed global memory director and switch to a non-dual write mode. Striping between global memory directors is default. Each global memory director has 16 ports with point-to-point serial connections between the global memory director and channel or disk directors (16 directors) through the direct matrix. Each memory director port consists of a pair of full-duplex serial links, two serial links out (TX) and two serial links in (RX). Each of the eight director ports on the 16 directors connect to one of the 16 memory ports on each of the eight global memory directors. These 128 individual point-to-point connections facilitate up to 128 concurrent cache operations in the system.

The Symmetrix DMX system can support up to eight slots in the midplane dedicated to global memory and 512 GB of global memory (256 GB effective). Individual global memory directors are available in 8 GB, 16 GB, 32 GB, and 64 GB sizes.




Lesson 2: Configuration LimitationsUpon completion of this lesson, you will be able to:

Summarize the various distances that can be obtained with the different front-end directors available in a DMX-4





Symmetrix Fibre Channel Cable distances

The Symmetrix Fibre Channel adapter provides an interface between the director and open systems host channels.

Each Fibre Channel adapter is located at the rear of the mid-plane, opposite its corresponding channel director.

These adapters provide the connectivity between the host channels and the Fibre Channel directors (FC-0 layer of the Fibre Channel standard). The eight-port Fibre Channel director provides the capability for eight concurrent operations through its eight physical interfaces for communicating with the host systems.

Fibre Channel directors use fiber optic cables. The channels use Fibre Channel arbitrated loop or switched fabric links.

Each link has two physical fibers for transporting data: One for inbound signals and one for outbound signals.

The current Fibre Channel implementation supports data transfer rates up to 4 Gb/s.




Symmetrix ESCON Cable Distances

Each repeater can be either an ESCON director or an IBM 9036 Remote Channel Extender

If two ESCON directors are used, one of them must use ports that are dedicated to the Symmetrix-to-ESCON channel path

ESCON director

The ESCON director provides dynamic switching and extended link path lengths (with XDF capability) when attaching an ESCON channel (TYPE=CNC) to a Symmetrix serial channel interface. One or two ESCON directors may be configured in the channel attachment.

However, one of the directors must be configured with a static connection because the ESCON architecture recognizes only one port

address. The dynamic switch configuration is defined in the IOCP. The ESCON director may also be used to provide additional flexibility and extend channel lengths when used with channel converters.

Channel extender

The IBM 9036 Remote Channel Extender (or equivalent device) attaches an ESCON channel (TYPE=CNC) to a Symmetrix serial channel interface. The Remote Channel Extender extends the distance of the connection and, depending on the model, can convert connections from multimode (3 km) to single-mode (20 km). Connections to Symmetrix serial channel interfaces must be multimode.




Symmetrix FICON Cable Distances

FICON channels use fiber optic cables. The current FICON implementation supports data transfer rates up to 4 Gb/s. There are two types of fiber-optic cables: multimode and single-mode.

Symmetrix systems directly connect to FICON single-mode or multimode cables.

In the FICON environment, a link connects a host FICON channel with a Symmetrix FICON channel interface. This link can be a direct connection between the processor or LPAR and the FICON channel interface. The link can also have a FICON director that branches off to additional single-mode or multimode links with connections to Symmetrix FICON channel directors.

This table describes the maximum distances supported by FICON cables.





DMX-4 global memory directors work by default in pairs, available in size ranging from 8 to 64 GB per board

Fibre channel, GigE, and FICON can be intermixed on the same director board – Multi-mode (MM), single-mode (SM), or both

DMX-4 GigE SRDF channels and iSCSI host connections provide up to four 1Gb/s Ethernet ports per director, Fibre Channel’s maximum speed is 4 Gb/s





Module 6: Power SubsystemUpon completion of this module, you will be able to:

Describe how Symmetrix DMX-4 with new Enginuity 5772+ capabilities improve energy efficiency

Sketch how the new Power Calculator leads to savings in a DMX-4 environment

List what power related enhancements have been made in the area of power supplies, cabling, and other hardware components in the DMX-4





Lesson 1: Energy-EfficiencyUpon completion of this lesson, you will be able to:

Describe how Symmetrix DMX-4 with new Enginuity 5772+ capabilities improve energy efficiency




© 2007 EMC Corporation. All rights reserved. Symmetrix DMX-4 Functionality - 82 82

Energy-Efficiency CapabilitiesEfficiencies with Enginuity 5772+ – Increase performance without increasing power consumption

Tiered storage options– Support for high-capacity, low-cost 500 GB SATA II disks which are

33 percent more efficient than 500 GB drives

Accurate energy requirements – EMC Power Calculator V2 includes all EMC storage platforms and

SAN infrastructure

Symmetrix DMX-4 with new Enginuity 5772+ capabilities improve energy efficiency.

The higher performance levels provided with Enginuity 5772+ via the improved caching algorithms consolidate more workloads with less hardware, so DMX-4 users can also get more performance without additional power.

New tiered storage options for the DMX-4 platform offers the broadest range of energy-efficient disk drives, providing higher capacity for more terabytes per square foot. The Symmetrix DMX-4 is even more efficient through the support for 500 GB SATA II drives.

EMC Power Calculator V2 quantifies energy savings for refreshes, consolidations, and high capacity disks.




Energy-Efficient Storage Design

500 GB SATA II data compared with different capacity/performance drives

Lower capacity drives consume more power per terabyte

15K 73 GBFC

15K 146 GBFC

10K 300 GBFC

7.2K 500 GBFC

666 kWh/yr

1,226 kWh/yr

2,575 kWh/yr

5,150 kWh/yr91%

82%

65%

7.2K 500 GBSATA II

444 kWh/yr

33%

When tiering in a box, it is important to understand the relationship of the data to the service level being provided. Too high a service level for less critical data becomes expensive. Too low a service level for critical data and performance and data protection can suffer. Matching the right service level to the data is critical, and because Symmetrix DMX systems support the widest range of disk types and sizes, organizations can deploy the right drives to meet their requirement, be it a 15k rpm 73 GB drives for performance or a high-capacity 7.2k rpm 500 GB drives.

Not only is tiering within a system important from an operational, protection, and capital expenditure standpoint, but each drive also draws different amounts of power per year, as can be seen in this chart. By placing less-critical tier-2 or tier-3 data on high-capacity drives like 500 GB SATA II drives, a customer can save thousands of dollars in power and cooling costs per year.




Lesson 2: Power SubsystemsUpon completion of this lesson, you will be able to:

List what power related enhancements have been made in the area of power supplies, cabling, and other hardware components in the DMX-4





What Has Been Improved?DMX-4 hardware feature improvements consists of the following:– Enhanced power supplies (1,950W versus 1,800W)– Addition of color-coded AC cabling– Addition of a new PXU component

New Power Supply Part Numbers– 071-000-493 Artesyn 1950W power supply– 071-000-501 Acbel 1950W power supply




Power SuppliesThe new DMX-4 power supply is the same form as the DMX-3 power supply with minor changes to increase the output power rating from 1,800W to 1,950W– The additional output power will increase the overall power margin

within the system giving a power increase without the need of additional power supplies

The new 1950W power supply will be used as a universal spare in the field– For 6-slot systems (950 model) as well

SymmWin has been changed to accept the new part numbers– Changes have also been made to the Power Calculator

Up to eight 1,950 watt power supplies support the system bay and are split between two (A and B) three-phase power zones, where each zone supports up to four power supplies. One zone can maintain power for the entire system bay independent of the power supplies in the other zone.

The DMX-4 is available in three-phase Delta or three-phase WYE configurations.

Part numbers:

- 071-000-493 : Artesyn 1,950W power supply

- 071-000-501 : Acbel 1,950W power supply




AC CablingUse of color coded internal AC cabling– Enhances visual indication of AC power zone feeds– Only available with new DMX-4 systems

Color coding addresses some of the cabling issues between power zones

AC cables Zone ‘A’ are grey

AC cables Zone ‘B’ are black

Addition of color coded internal AC cabling provides a visual indication of the different AC power zone feeds within the cabinet.

Change was put in place to help address some of the cabling issues between power zones

AC cables within both the disk and equipment bays will now be black (Zone B) or grey (Zone A)




Symmetrix DMX-4 Power Configurations

Each bay requires two separate PDUs– Same requirements for the system bay and each storage bay– One PDU for Zone A and one for Zone B

The Symmetrix DMX-4 power subsystem supports three-phase Delta or three-phase WYE configurations.

Each DMX-4 system bay and each storage bay require two separate PDUs, one for Zone A and one for Zone B.




PXUPXU = Power Extender Unit

Small PDU

DMX-4 1500-4500 (24-slot) only

Avoids Power distribution (PDU) circuit overload

Part number: 100-885-180

The Power Extender Unit (PXU) is essentially an additional mini PDU in the main 24-slot bay (only).

Since the new power supplies could now draw more power, the existing PDU circuit breakers could trip under certain load conditions.




PXU LocationTwo PXU per System Bay

One PXU for each zone

PXU provides main interface between the input AC from the PDP and a SPS in the system

PXU can handle domestic and international single-phase or 3-phase AC power

Two PXUs, one for each zone provide a main interface between the input AC from the PDP and a SPS in the system

The PXU can accommodate and distribute domestic and international single-phase or 3-phase power input sources from the PDP to the system Field Replaceable Units (FRU).

Up to eight Standby Power Supplies (SPS) units back up each of the power supplies.

If AC power fails, the SPS assemblies can maintain power for two 5-minute periods of AC loss while the Symmetrix system shuts down.




System Bay Power Connections With PXUs

PXU PXU

PDP

PDUPDU

PDP

To XCM-1 To XCM-1

This wiring diagram shows the placement of the power elements in the DMX-4 system bay. Please take a moment to review it.

Note that this is not just an example; all cables must be plugged in as shown.

- Blue= Zone ‘B’ AC power from SPS to card cage power supply. Part number: 038-003-209

- Gray = Zone ‘A’ AC power from SPS to card cage power supply. Part number: 038-003-548

- Black = Zone ‘B’ AC power from PDU to SPS. Part number: 038-003-208

- Orange = Zone ‘A’ AC power from PDU to SPS. Part number: 038-003-547

- Red = RS232 sense cable from SPS to XCM. Part number: 038-002-307





Symmetrix DMX-4 with new Enginuity 5772+ capabilities improves energy efficiency

The new Power Calculator quantifies energy savings for consolidations and SATA high capacity disks– Reporting on operational cost, weight, energy consumption, sound,

and floor space

Power has been enhanced, with 1,950W power supplies, color-coded AC cabling, and the addition of a new PXU

The Power Extender Unit (PXU) aids in avoiding Power distribution (PDU) overload





Course SummaryKey points covered in this course:

Customers should choose DMX-4 because of its power efficiency, security, and the support for Stiletto DAE and SATA disk drive technologies

Although drives with different capacities and/or different speeds can now be intermixed in Symmetrix DMX-4 systems, locations on disk director pairs and drive loops may affect application performance

DMX-4 Stiletto drive enclosures operate at 4Gb/s, and provides improved isolation of error conditions

Symmetrix DMX-4 with new Enginuity 5772+ capabilities improves energy efficiency

These are the key points covered in this training. Please take a moment to review them.

This concludes the training. Please proceed to the Course Completion slide to take the assessment.

Documents

Symmetrix Dmx-4 Functionality_ce_student Resource Guide