For information about the RAID controller cache memory and rechargeable battery,
see “Cache memory and RAID controller battery” on page 46.
Replacing a RAID controller
When instructed to do so by the storage-management software, replace a RAID
controller that has failed.
Important:
The replacement RAID controller CRU does not come with a RAID
controller cache battery installed, nor the mounting hardware that holds
the battery in place inside the RAID controller. 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, using the battery unit mounting hardware taken from the existing
controller. The steps to remove and replace the battery are included in
the following procedure.
To replace a RAID controller, perform the following steps:
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. 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 38 mm (1.5 in.).
3. From the RAID controller that has failed, remove the fibre-channel cables from
the SFPs. The location of these components is shown in Figure 50 on page 65.
Battery-access panel (on bottom)
Levers
Ethernet address label
Figure 49. RAID controller levers and labels
64
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