Battery Backup Units - Cisco UCS C240 Installation And Service Manual
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Appendix C
RAID Controller Considerations
Battery Backup Units
Battery Backup Units
This server supports installation of up to two RAID battery backup units (BBUs) or SuperCap power
modules (SCPMs). The units mount to clips on the removable air baffle (see
Figure
3-37).
The iBBU09 battery backup unit (BBU) has been phased out by Cisco and replaced with the SuperCap
Note
power module (SCPM). If you are replacing a BBU, order the SCPM for the replacement
(UCS-RAID-CV-SC=). Cards that used the BBU are compatible with the SCPM.
The SCPM provides approximately 3 years of backup for the disk write-back cache DRAM in the case
of sudden power loss by offloading the cache to the NAND flash.
For RAID backup unit replacement instructions, see
Replacing the LSI RAID Battery Backup Unit or
SuperCap Power Module, page
3-64.
Cisco UCS C240 Server Installation and Service Guide
C-5
OL-25761-01
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