The MegaRAID LSIiBBU09, used with the MegaRAID SAS 9265, 9285, 9266, 9286, 9270 and 9271 series controllers, provides higher ambient temperature tolerances and increased serviceability while protecting the integrity of cached data in the event
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.
HP 512MB B-series 24 inch Dynamic SA Flash Backed Write Cache for BL420c Gen8
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