Cisco Systems OL-26646-01 manual Replacing the SuperCap Power Module RAID Backup Unit

Chapter 3 Maintaining the Server

Installing or Replacing Server Components

Replacing the SuperCap Power Module (RAID Backup Unit)

This server supports installation of one SuperCap power modules (SCPMs). The SCPM mounts inside a bracket that is next to the cooling fans (see Figure 3-23).

The SCPM is supported only when using the LSI MegaRAID-CV controller card. This supercap module 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.

To replace the RAID backup unit, follow these steps:

Step 1 Remove an SCPM (see Figure 3-23).

a.Power off the server as described in the “Shutting Down and Powering Off the Server” section on page 3-6.

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 the “Removing and Replacing the Server Top Cover” section on page 3-7.

d.Disconnect the cable from the existing SCPM.

e.Slide the SCPM free of the clips on the bracket (see Figure 3-23).

Step 2 Install a new SCPM:

a.Slide the new SCPM into the clips on the bracket.

b.Connect the cable from the RAID controller to the new SCPM.

c.Replace the top cover.

d.Replace the server in the rack, replace cables, and then power on the server by pressing the Power button.

	Cisco UCS C22 Server Installation and Service Guide
OL-26646-01		3-41