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C-2
Cisco UCS C250 Server Installation and Service Guide
OL-20888-02
Appendix C RAID Controller Considerations
Battery Backup Unit
Battery Backup Unit
T
his server
supports installation of one LSI RAID battery backup unit (BBU). The unit mounts directly
to the LSI MegaRAID card (see
Replacing an LSI Battery Backup Unit, page 3-38
).
The optional LSI BBU is available only when using the optional LSI MegaRAID controller cards. This
BBU provides approximately 72 hours of battery backup for the disk write-back cache DRAM in the
case of sudden power loss.
RAID Controller Cabling
This section includes the following topics:
•
Cable Routing, page C-2
•
Cisco UCS C250 Server Cabling, page C-3
Cable Routing
The red line in
Figure C-1
shows the recommended cable routing path from the backplane to the possible
controller locations.
Figure C-1
RAID Controller Cabling
1
Drive backplane
2
PCIe risers for controller cards
331412
1
2
Содержание UCS C250
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