Replacing The Supercap (Raid Backup) - Cisco APIC M3 Installation And Service Manual

Replacing the Supercap (RAID Backup)

For servers running in standalone mode only: After you replace controller hardware (APIC-RAID-M5),
Note
you must run the Cisco Host Upgrade Utility (HUU) to update the controller firmware, even if the firmware
Current Version is the same as the Update Version. This is necessary to program the controller's suboem-id to
the correct value for the server SKU. If you do not do this, drive enumeration might not display correctly in
the software. This issue does not affect servers controlled in UCSM mode.
See the HUU guide for your Cisco IMC release for instructions on downloading and using the utility to bring
server components to compatible levels:
Figure 39: mRAID Riser (Internal Riser 3) Location
1 External blue handle
2 Two pegs on inner chassis wall
Replacing the Supercap (RAID Backup)
This server supports installation of one supercap unit. The unit mounts to a bracket that is in the middle of
the row of cooling fan modules.
The supercap provides approximately three years of backup for the disk write-back cache DRAM in the case
of a sudden power loss by offloading the cache to the NAND flash.
Cisco APIC M3/L3 Server Installation and Service Guide
76
HUU Guides.
3 Card-ejector lever
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Maintaining the Server