Replacing The Battery In The Raid Controller - IBM TotalStorage 300 Service Manual

10. Wait approximately one minute, and then check the green Host Loop LED,
11. Refer to the storage-management software online help for instructions on

Replacing the battery in the RAID controller

Each RAID controller contains a rechargeable battery that maintains the data in the
cache memory.
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.
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IBM NAS 300 Service Guide
5. Copy the battery replacement information from the label on the front of the
failed RAID controller to the label on the front of the replacement RAID
controller CRU.
6. 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-management software automatically synchronizes the firmware
between the existing controller and the new controller. After replacing a
controller, always use the storage-management software to verify the firmware
levels and NVSRAM files.
7. Insert the GBICs.
8. Connect the Fibre Channel cables to their original locations.
9. If you have a single-controller configuration, turn ON power to the storage
server and attached devices. For the proper power-on sequence, see
"Powering the IBM NAS 300 on and off" on page 42.
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, refer to the storage-management
software for problem determination.
bringing the controller online.
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. Follow the steps given in the software procedure before
continuing with this procedure.
Attention: When you handle electrostatic discharge (ESD) sensitive
devices, take precautions to avoid damage from static electricity. For details
about handling ESD-sensitive devices, see "Handling static-sensitive devices"
on page 85.
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.