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Cisco UCS C220 M4 Server Installation and Service Guide
OL-32473-01
Chapter 3 Maintaining the Server
Installing or Replacing Server Components
Replacing the Supercap Power Module (RAID Backup)
This server supports installation of one supercap Power module (SCPM). The unit mounts to a bracket
that is in the middle of the row of fan modules (see Figure 3-20).
The SCPM 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.
See also:
• Replacing a Cisco Modular RAID Controller Card, page 3-29
• Replacing a Modular RAID Controller Transportable Memory Module (TMM), page 3-30
Warning
There is danger of explosion if the battery is replaced incorrectly. Replace the battery only with the
same or equivalent type recommended by the manufacturer. Dispose of used batteries according to
the manufacturer’s instructions.
Statement 1015
Step 1 Remove an existing SCPM (see Figure 3-20).
a. Power off the server as described in Shutting Down and Powering Off the Server, page 3-7.
b. Slide the server out the front of the rack far enough so that you can remove the top cover. You might
have to detach cables from the rear panel to provide clearance.
Caution If you cannot safely view and access the component, remove the server from the rack.
c. Remove the top cover as described in Removing and Replacing the Server Top Cover, page 3-8.
d. Disconnect the SCPM cable from the existing SCPM.
e. Release the securing clip on the bracket retainer bar and then open the retainer bar (see Figure 3-20).
f. Lift the SCPM free of the bracket and set it aside.
Step 2 Install a new SCPM:
a. Set the new SCPM into the mounting bracket.
b. Connect the cable from the Cisco modular RAID controller to the new SCPM.
c. Close the retainer bar over the SCPM. Push down until the securing clip clicks and holds down the
retainer bar.
d. Replace the top cover.
e. Replace the server in the rack, replace cables, and then power on the server by pressing the Power
button.
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Weight and Dimensions
