Answers to Your IT Nightmares

Cache on Storage ControllersWhy You Need More

Lowdown on Cacheo Buffer for Data Being Read or Written

Data Goes to Cache First Then to Disks

o It’s Memory Out Performs Hard Drives Heavily

o Memory is Volatile Cache is Backed by a Battery

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Why More?o More Data Can Be Buffered

Before Read or Writeo Small Data Transactions

Fastero High Capacity Transactions

Significant Burst in Beginning

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Effects on Performanceo If Controller / RAID Battery Fails...o Significant Speed Decrease

Due to Write Cache Not Workingo Many Tech Support Calls About This

Highly Decreased Server Performance Troubleshooting Reveals Cache was Disabled

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Cache Importanceo Performance RAID Controllers

Have Cache by Defaulto Price to Upgrade to Full Potential

Worth It in the Long Runo RAID on New Servers Capable of 2-

4GB Standard Used to be 512MB-1GB

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Take a Looko http://www.aventissystems.com/Articles.asp?ID=

411

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