HP LeftHand P4000 SAN Solutions - Manual (Page 258)

Figure 126 Card 1 location
Figure 127 Card 2 location
A cache module is attached to each RAID controller and each cache module is connected to a
battery. The unit is called a backup battery with cache (BBWC). BBWC 1 connects to Card 1 and
BBWC 2 connects to Card 2.
Removing the RAID controller
1. Power off the storage system:
a.
Use the CMC to power off the system controller as described in “Powering off the storage
system” (page 17) .
b. Manually power off the disk enclosure.
2. Unplug all cables from the power outlets.
3. Remove the storage system from the rack and place it on a flat surface.
258 Replacing hardware