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

Release Notes
AA–R1ZZE − TE Page 73
e. Connect the CLI interface to one of the controllers and perform
SHOW <UNIT> command for the unit with the root device (D600 in case of
the example).
HSZ> show d600
LUN Uses
----------------------------------------------------------
D600 DISK600
...
State:
ONLINE to this controller
Not reserved
PREFERRED_PATH = THIS_CONTROLLER
...
If the output shows that the unit is “ONLINE” to this controller
(as is the case in this example), then THIS_CONTROLLER is
the master controller.
If the output shows that the unit is “ONLINE” to the other
controller, then OTHER_CONTROLLER is the master
controller.
2.
Halt all host I/O activity to the controller and prepare the host system for a
controller shutdown using the appropriate procedures for your operating
system.
3.
Establish a local connection to the controller through the maintenance port
of the controller.
4.
Enter the SET NOFAILOVER command to take the controllers out of dual-
redundant (failover) mode.
$ SET NOFAILOVER
5. Shutdown the controller with the following command:
SHUTDOWN THIS_CONTROLLER
CAUTION
Failure to shut down the controller in this step could result in
problems with RAIDsets and cache when the controller is reset.