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Replacing the Supercap (RAID Backup)
Figure 10: Top View of Fan Modules
1
Fan module release latches
Step 7
Return the chassis to the rack and replace any cables that you removed.
Replacing the Supercap (RAID Backup)
This chassis supports installation of up to four supercap units, one for each installed compute node. The units
install to numbered bays and the supercap cables connect to numbered sockets in the supercap compartment.
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.
Step 1
Prepare the server for component installation:
a) Shut down the compute node that corresponds to the supercap unit that you are replacing as described in
Down and Removing Power From the System, on page
b) Slide the server out the front of the rack far enough so that you can open the supercap compartment 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.
Step 2
Open the supercap compartment cover:
a) Use a #1 Phillips-head screwdriver to loosen the single captive screw on the cover.
Maintaining the Server Chassis
22
2
Fan module fault LEDs
6.
Maintaining the Server Chassis
Shutting
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