LSI Logic CacheVault Power Module 02 (CVPM02) - for
9266/9270/9271/9286 Series Controllers
This is the power module with connection cable only.
CacheVault Flash Module is not included.
LSI® MegaRAID® CacheVault™ Technology
Providing access to write-back
Cache is one of the many benefits of a
RAID controller card. Write-back
Cache improves application performance by storing write data to high
Memory during periods of heavy use. When there is a break in user requests
the data is then written from the
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
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
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.