Replacing The Battery In The Raid Controller - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

19. You must reconnect the battery harness to the two-pin connector on the
20. Flip the RAID controller bottom panel over and carefully place it on the
21. Install the new RAID controller, as follows:
22. Insert the SFPs according to the instructions in "Installing SFP modules" on
23. Connect the fibre-channel cables to their original locations, according to the
24. Wait approximately one minute, and then check the green Host Loop LED,
25. See the Storage Manager client online Help for instructions on bringing the

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.
Important: If you are replacing the battery in a DS4300 single-controller storage
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IBM TotalStorage DS4300 Fibre Channel Storage Subsystem: Installation, User's, and Maintenance Guide
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.
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.
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 138. Reinsert the six screws. Do not overtighten.
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 you replace a
controller, always use the storage-management software to verify the firmware
levels and NVSRAM files.
page 33.
instructions in Chapter 3, "Cabling the storage subsystem," on page 29.
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, or contact IBM support.
controller online.
subsystem (Model 6lU/6LX), complete the following steps before
beginning the replacement procedure:
v Schedule down time for the battery replacement, because the disk
will not be available during the procedure.
v Complete any necessary server preparation tasks.
v Save the configuration/profile.
v Use the Storage Manager client to flush and disable the cache on
the controller, using the following steps. Either check that the cache
LED on the back of the controller is off, or wait two to three minutes.