RAID Array 450 HSZ50 HSOF Software Version 5.7 for Compaq Tru64 UNIX Release Notes

RAID Array 450 HSZ50 HSOF Software Version 5.7 for Compaq Tru64 UNIX
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CAUTION
Do not turn off the power to the controller subsystem until all
shutdown procedures have successfully completed.
5. If you have a dual-redundant controller configuration, shut down each
controller one at a time, using the following commands:
SHUTDOWN OTHER_CONTROLLER
SHUTDOWN THIS_CONTROLLER
If you have a non-redundant controller configuration, only the
SHUTDOWN THIS_CONTROLLER command is necessary.
The green reset LED stops blinking when the
SHUTDOWN command
completes.
6.
When the controller SHUTDOWN command successfully completes, turn off
power to the controller subsystem (or just the controller shelf, if you are
not shutting down the entire system, by unplugging the power supplies in
the controller shelf).
5.2.5 Disabling the Write-Back Cache Batteries
Refer to Chapter 2 in HSZ50 Array Controller HSOF Version 5.1 Service
Manual, for instructions on removing and replacing the controller module and
write-back cache module.
1.
Stop all host activity and dismount all device units from the host system.
Device service is interrupted for the duration of the service cycle. You can
shut down the host operating system to accomplish this.
2.
Connect a maintenance terminal to the controller’s maintenance terminal
port on the front bezel.