BROADCOM CVPM05 Cache Protection Module (MPN 05-50039-00)

RAID controller cards temporarily cache host data to improve I/O performance by writing to controller cache before the storage media. Cached data is at risk if system power fails, since unwritten cache entries can be lost. CacheVault® flash cache protection modules and battery backup units (BBUs) protect cached data integrity by storing cache contents in non‑volatile flash or by supplying battery power to the controller so cached writes can be completed.

Advantages

CacheVault technology prevents data loss by supplying power long enough to transfer cached data to NAND flash and restores it to cache when power returns. Using a super‑capacitor instead of Lithium‑ION batteries reduces hardware maintenance, lowers total cost of ownership over the controller card lifetime, and offers a more environmentally friendly form of cache protection while preserving RAID performance.

Key specifications

• Protection types: CacheVault flash module or battery backup unit (BBU)
• Backup mechanism: Non‑volatile NAND flash or battery/super‑capacitor power
• Primary function: Preserve integrity of RAID controller cache during power loss
• Benefit: Enables automatic transfer of cached writes to flash on power failure
• Maintenance: Super‑capacitor option minimizes battery replacements

How to use

Install the CacheVault module or BBU according to the RAID controller manufacturer instructions. Configure the controller to enable cache protection so that, on power loss, the controller triggers the transfer of cached data to NAND flash or maintains power long enough to complete pending writes. After power is restored the controller returns data from flash to cache and resumes normal operation.

Recommendations

Choose CacheVault flash modules when you prefer lower maintenance and environmental benefits; use BBUs where immediate battery backup is required and verify compatibility with your RAID controller model and firmware before purchase.