- Manufacturer Part Number: 2275400-R
- Memory Size: 2 GB
- Data Backup Type: Battery Backed
- Device Supported: RAID Controller
- Weight (Approximate): 13.76 oz
- Compatibility:
Adaptec RAID Adapters:
- 72405
- 71685
- 71605
- 7805
- 71605Q
- 7805Q
- Environmentally Friendly: Yes
- Environmental Certification: RoHS
- Limited Warranty: 3 Year
Overview
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.
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