LSI Rmote CacheVault Kit with CacheVault Flash Module 02/Power Module 02/remote cable/Clip for LSI9266 series
[ LSI00297/CVM01 CacheVault KIT ]

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LSI Logic MegaRAID Cache LSICVM01 LSI00297 CacheVault Flash Cache - for 9266-4i/8i

In the Box:
CacheVault Flash Module (CVFM02),
CacheVault Power Module (CVPM02)
with 3? cable, 24? remote cable extender, CVPM clip

LSI MegaRAID CacheVault Technology

Providing access to write-back Cache is one of the many benefits of a Hardware RAID controller card. Write-back Cache improves application performance by storing write data to high performance Cache Memory during periods of heavy use. When there is a break in user requests the data is then written from the Cache Memory to the array. During normal write-back operation, data is written to Cache (DRAM), the IO is acknowledged as ?complete? to the application that issued the write, and later the write is flushed to disk. If power is lost while write-back Cache is enabled, the writes in DRAM may be lost. And since the controller has already acknowledged the IOs as complete, the application is unaware of the data loss.

To minimize this risk, Enterprise RAID controllers equipped with Cache typically offer a battery back-up (BBU) option. The purpose of the battery is to provide power to the controller in the event that the power from the Server is interrupted. This protects the data in the Cache until power to the Server can be restored and Cache data written to disk. While generally effective, BBUs may require maintenance, special handling and protect Cache data for a limited time. CacheVault technology, providing flash-based Cache protection for MegaRAID 6Gb/s SATA+SAS RAID controllers, offers a greener, lower total cost Cache protection solution without the drawbacks of a BBU.

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