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25. See the storage-management software 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 five days without power to the unit.
Use the following procedure if the storage-management software instructs you to
replace the battery because the current battery has failed or is nearing its expiration
date. You can also use the storage-management software to check the status of the
battery.
1. Check the storage-management software for instructions on battery
replacement procedures. If you are not using write-cache mirroring, this might
involve clearing cache memory on the RAID controller that contains the battery
that has failed. This is done by either placing the controller offline before
removing it from the FAStT600 server or turning off caching in the FAStT600
server, using storage-management software. Follow the steps given in the
software procedure before you continue with this procedure.
Attention: When you handle static-sensitive devices, take precautions to
avoid damage from static electricity. For details about handling static-sensitive
devices, see “Handling static-sensitive devices” on page 45.
2. Unpack the new battery.
Set the new battery on a dry, level surface. Save all packing materials in case
you need to return the battery.
Note: The battery comes with a new battery label. You will need this label
later in the procedure.
3. Review all documentation that comes with the new battery for updated
replacement procedures and other information.
4. Use the storage-management software to locate the RAID controller that
contains the failed battery (the RAID controller Fault LED might be on).
5. Label each cable that connects to the RAID controller that contains the battery
that has failed. This ensures that all cables will be properly reconnected to the
RAID controller after you replace the battery.
6. Use the storage-management software to take offline the RAID controller that
contains the battery that has failed.
Attention: To prevent data loss, you must shutdown the system before you
can replace the RAID controller battery. For the proper shutdown sequence,
see “Turning off the storage server” on page 36.
7. Remove the fibre-channel cables and the SFPs from the RAID controller that
contains the battery that has failed or is nearing its expiration date. For more
information, see “Working with SFPs and fiber-optic cables” on page 25.
8. Remove the RAID controller as described in “Replacing a RAID controller” on
page 60.
9. To remove the cache battery, place the RAID controller CRU bottom up on a
flat surface. Using a #2 Phillips head screwdriver, remove the six screws (three
on each side of the RAID controller) that hold the RAID controller bottom panel
to the sides of the RAID controller, as shown in Figure 53 on page 63.
10. Slide the RAID controller bottom panel away from the front side of the RAID
controller (away from the SFP slots and black center latch) to unlatch it from
the side panels.
Chapter 5. Installing and replacing components 65