Microsemi2275400-R - Flash Module 700 (AFM-700for Series 7 RAID **OPEN BOX**

Enabling the onboard cache on a RAID adapter card signi cantly enhances performance - especially in RAID 5 and RAID 6 scenarios - by accommodating both read caching and write caching of data. But data stored in the cache for write caching can be lost if the cache is not protected against a power or system failure.Lithium-ion (Li-ion) battery backup units (BBUs) are traditionally employed to protect cached data on RAID adapters. Once installed a new BBU will take several hours to reach a full charge. During the charge cycle write cache is unprotected (i.e. turned o ) which adversly a ects the RAID adapter's performance. A typical BBU requires routine capacity testing and performs sub-optimally during those test periods. Lastly a fully-charged BBU can only preserve data for a maximum of 72 hours during a power loss before the battery power depletes.