A cache battery, a battery backup unit (BBU), is a small rechargeable lithium-ion battery integrated into many RAID controllers. It serves a crucial purpose - to temporarily power the cache memory of the RAID controller in the event of a power failure.
RAID controllers utilize a high-speed cache memory to improve performance. This cache stores data and parity information briefly before writing it to the physical disks. During a power outage, data in the cache is at risk of being lost without a way to write it out. The cache battery provides backup power so the controller can flush all cached data to disks, preventing data loss.
Look for batteries suited for your specific RAID card, as they come in various voltages and capacities. Renowned brands like HP, Dell, IBM, and Lenovo offer high-quality batteries in server environments that last a long time.
Purchasing a replacement battery can extend the usable life of your RAID solution. We carry a wide selection of OEM and compatible batteries to suit all major manufacturers. If you aren't sure which battery your system requires, let our storage experts help you identify the correct part.
Don't leave your valuable RAID configuration and data vulnerable without proper battery backup protection. Our knowledge experts can also advise on proactively replacing old batteries to maintain optimum RAID controller operation.
ServersFit has years of experience supplying server hardware to IT professionals. Reach out to discuss your specific data storage needs - we're ready to find the correct cache battery and other components to optimize your solution.