IBM totalstorage fastt100, Installation, User And Maintenance Manual, Page: 118 / 160

Note: The preferred method of checking for the battery operating age is
through the storage server management software.
18. Position the battery inside the replacement RAID controller.
19. Reassemble the battery access panel to the RAID controller bottom panel by
aligning it with the three pins on the RAID controller bottom panel. Slide the
battery access panel toward the back until you can reinsert the screw that
holds the battery access panel to the RAID controller bottom panel. Do not
overtighten.
20. You must reconnect the battery harness to the two-pin connector on the
controller board.
Note: The connector is keyed so that there is only one way to attach the
harness to the connector. Do not force fit.
21. Flip the RAID controller bottom panel over and carefully place it on the
controller sides. Push the RAID controller bottom panel toward the front to
latch it to the side panels. If the controller bottom panel is placed correctly, you
should be able to access the mounting holes for the six screws that you
removed from step 6 on page 86. Reinsert the six screws. Do not overtighten.
22. Install the new RAID controller, as follows:
a. Slide the RAID controller all the way into the empty slot.
b. Close both levers until the latch locks into place.
Attention: When you replace the failed RAID controller, the Storage
Manager client automatically synchronizes the firmware between the existing
controller and the new controller. After you replace a controller, always use the
Storage Manager client to verify the firmware levels and NVSRAM files.
23. Insert the SFPs according to the instructions in “Installing SFP modules” on
page 40.
24. Connect the fibre-channel cables to their original locations, according to the
instructions in “Installing fiber-optic cables” on page 42.
25. Wait approximately one minute, and then check the green Host Loop LED,
green Expansion Loop LED, and amber Fault LED on the new RAID controller.
v
If the Host Loop LED or the Expansion Loop LED is off, the RAID controller
might not be inserted correctly. Remove the CRU and reinsert it.
v If the Fault LED is on, the Host Loop LED and the Expansion Loop LED
stay off, or any other Fault LED is on, see the Storage Manager client for
problem determination.
26. See the Storage Manager client online help for instructions on bringing the
controller online.
Replacing the battery in the RAID controller
Each RAID controller contains a rechargeable battery that maintains the data in the
cache memory for three days without power to the unit.
Use the following procedure if the Storage Manager client instructs you to replace
the battery because the current battery has failed or is nearing its expiration date.
You can also use the Storage Manager client to check the status of the battery.
1. Check the Storage Manager client online help for instructions on battery
replacement procedures. If you are using write-cache mirroring, this might
involve clearing cache memory on the RAID controller that contains the battery
that needs to be replaced. This is done by either placing the controller offline
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IBM TotalStorage FAStT100 Storage Server: Installation, User’s, and Maintenance Guide