Raid Or Expansion Controller; Disengaging The Disk Array Controller - HP StorageWorks 9000 - Virtual Library System User Manual

RAID or Expansion Controller

There are two controllers in each VLS9000 disk array enclosure: either two RAID controllers or two
expansion controllers. Both controllers in a disk array enclosure operate during normal disk array
operation. If one of the controllers fails, the other controller takes over operation of the storage system
until you install a new controller. A controller can be hotswapped, which means you can replace one
controller without halting I/O to the storage system or powering it off, as long the other controller is
operational.
CAUTION:
When you remove a controller with the disk array enclosure powered on, install a replacement
controller or a blank within two minutes. Otherwise, the disk array enclosure might overheat.
NOTE:
A damaged midplane may appear as though a controller has failed. If you replace a controller and
it does not remedy the original fault, replace the whole disk array enclosure.
To replace a RAID controller or expansion controller:
1. Disconnect all cables attached to the controller.
2. Turn the thumbscrew on each latch counterclockwise until the screw disengages from the controller.
Do not remove the screw from the handle.
Figure 87 Disengaging the disk array controller
.
Item
1
2
3. Press both latches downward to disconnect the module from the midplane.
4. Pull outward on the latches to slide the controller out of the disk array enclosure.
5. Loosen the thumbscrews on the latches of the new controller and press the latches downward.
Description
Latches
Thumbscrews
HP StorageWorks 271