IBM TotalStorage FAStT200, Installation And User Manual

Page: 72 / 114

54
IBM FAStT200 and FAStT200 HA Storage Servers Installation and User’s Guide
8. Wait approximately one minute, and then check the green Host Loop LED, the
green Expansion Loop LED, and the amber Fault LED on the new RAID controller
CRU.
• If the Host loop LED or the Expansion Loop LED is off, the RAID controller
CRU might not be inserted correctly. Remove the CRU and reinsert it.
• 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.
9. Refer to the storage-management software online help for instructions about
downloading the redundant 3542-2RU NVSRAM files and bringing the controller
online.
Replacing a RAID controller
When instructed to do so by the storage-management software, replace a RAID
controller that has failed.
Note: The replacement RAID controller CRU does not come with a RAID controller
cache battery installed. You must remove the cache battery that is inside the
existing RAID controller that you are replacing, and install that battery inside
the replacement RAID controller CRU. The steps to remove and replace the
battery are included in the following procedure.
To replace a RAID controller, do the following:
1. Check the storage-management software for instructions on RAID controller
failure-recovery procedures. Follow the steps provided in the software
documentation before continuing with step 2.
2. If you have redundant RAID controllers (dual-controller configuration), use the
storage-management software to take the RAID controller that has failed offline.
Attention: To prevent data loss if you have a single controller configuration, you
must shutdown your system before you can replace the RAID controller. For the
proper shutdown sequence, see “Turning off the storage server” on page 25.
3. Label each cable that connects to the RAID controller that has failed. This
ensures that all cables will be properly reconnected to the new RAID controller.
Attention: Handle and install fiber-optic cables properly to avoid degraded
performance or loss of communications with devices. When working with fiber-
optic cables, do not pinch them, step on them, or locate them in aisles or
walkways. Do not overtighten the cable straps or bend the cables to a radius
smaller than 76 mm (3 in.).