IBM 81Y4508 Controller
IBM ServeRAID M5100 Series Battery Kit (Part Number: 81Y4508) — is a Battery Backup Unit (BBU) designed to protect cached data on M5100 series RAID controllers. In the event of an unexpected power loss, this battery provides emergency power to the controller's memory, ensuring that unwritten data is preserved until power is restored. Enabling the "Write-Back" caching policy with this battery significantly boosts disk write performance while maintaining enterprise-grade data protection.
Key Specifications:
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Function: Cache data protection during power outages.
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Chemistry: Lithium-ion.
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Controller Support: ServeRAID M5110, M5110e, M5120.
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System Support: IBM System x M4 generation servers.
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Kit Contents: Battery module and interconnect cable.
