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Data Backup and Disaster Recovery
Objectives
Explain what backup is. Explain data backup and recovery plan. Explain the types of backup. Explain the types of backup media. Explain the need for data backup security. Explain what disaster recovery is. Explain the disaster recovery strategies.
What is Backup?
Backup – is a duplicate copy of key information such physical (paper) and computer records.
A good set of back procedures is necessary to ensure that data is protected.
What is Backup?
Data that should be backed up regularly includes, but is not limited to email correspondence, audit files, user
information, utilities and applications, operating systems, financial data and databases, as well as customer lists.
Data Backup and Recovery Plan
The following are some factors that you might consider in creating a backup and recovery plan.
Schedule of Backup Backing up data should be done at a convenient
time. Location of Backup Storage
It is highly recommended that another set of data backup is stored remotely in case of a natural disaster as fire, leak, etc.
Data Backup and Recovery Plan (cont’d)
Data Backup Contents This will help you to decide it the data needs
to be backed up, how it should be backed up and when it should be backed up.
Frequency of Backups The rate at which the data changes effects
the frequency the data should be backed up.
Data Backup and Recovery Plan (cont’d)
Time of data restoration The planning of backup depends a lot on the
time it takes to recover a system Type of information contained in the
system It is important to know what information the
data contains so that you can identify it as critical, confidential and etc.
Data Backup and Recovery Plan (cont’d)
Backup media Backup tapes are cheap, compact and can
store large amounts of data.
Types of Backup
There are different combinations of backups available: Full (Normal)
Back up all data from the hard disk or a directory or folder of the hard drive.
Copy All the selected files and folders are backed up
and archive attribute is not changed to allow other types of backup to be performed on the same data.
Types of Backup (cont’d)
Incremental only files that have changed or been created
since the last back up, whether the backup itself is an incremental or full backup.
Differential files that have changed or been created since
the last full backup. Daily
files that have changed since the last daily backup
Types of Backup Media
Tape Drives Tape drivers can range in capacity from a few
megabytes to hundreds of gigabytes.
Types of Backup Media (cont’d)
Disk Drives Disk drives offers high speed but expensive
backup media.
Types of Backup Media (cont’d)
Removable Disks Removable drives are fast, easy to install and
portable.
Types of Backup Media (cont’d)
Digital Audio Tape DAT drives have a larger capacity as
compared to standard tape drive.
Types of Backup Media (cont’d)
Optical Jukeboxes Optical jukebox offer excellent amounts of
secure storage space ranging from 5 to 20 terabytes.
Types of Backup Media (cont’d)
Autoloader tape systems Autoloader tape systems use a magazine of
tapes to create extended backup volumes. It is recommended for businesses that needs
very high capacity.
Factors in Choosing Backup Media
Factors to consider in selecting an appropriate backup solution: Speed
It refers to how fast data can be backed up and recovered.
Reliability It refers to the reliability of the backup service and
media.
Factors in Choosing Backup Media Capacity
It refers to the amount of data to backup given the time and resource constraints.
Extensibility It refers to the ability of the backup solution to
address the current needs of the organization Cost
It refers to the cost of the backup solution and it should conform to the budget availability.
Backup Tips
Provide a point person to perform rollback in the case of an emergency.
Keep a record of the contents of the backup media and date of backup.Always verify backup.
Create a restore point.
Backup Tips
Encrypt and provide high permission on the backup file.
Create a detailed guideline on backup recovery.
Data Backup Security
There is a need to take steps to secure the backups if the information is confidential and critical such as personal or proprietary information.
Data Backup Security
Implement restrict access on the backup file and to backup storage location.
Store backups at an offsite facility.
What is Disaster Recovery?
Disaster Recovery is the restoration of system operations after a disaster has occurred which causes damage or physical loss.
Three types of sites Hot Site
It has the systems, communications and data on stand by thus allowing to get back online and resume operations within a few hours of failure.
What is Disaster Recovery? Warm Site
Has systems and communications on stand by but requires data to be restored first before operation can be resumed.
Cold Site Simply a physical location that has all the
resources necessary to support the system
Disaster Recovery Strategies
Plan a backup schedule A backup plan should be based on the
requirements for restoring data.
Disaster Recovery Strategies
Plan to backup open files Open files are files that are normally skipped
during the backup process.
Disaster Recovery Strategies
Plan restore with automated System Recovery (ASR) ASR is a new tool to automatically restore the
system after a system failure.
Disaster Recovery Strategies
Disaster Recovery Strategies (cont’d)
Test restores Verifying the backup by testing restore is one
of the most overloaded aspect of disaster recovery planning.
Backup should be tested to validate the backup and prepare for recovery.
By testing restore, restore procedures can be modified and documented conclusively.
Disaster Recovery Strategies (cont’d)
Some of the common problems encountered during restoration are the following: Incompatibility in hardware Missing hardware driver Corrupted backup media.
Summary
Explain what backup is. Explain data backup and recovery plan. Explain the types of backup. Explain the types of backup media. Explain the need for data backup security. Explain what disaster recovery is. Explain the disaster recovery strategies.