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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6.5 Low/Failed Battery on Dual-Redundant Configurations
with Preferred Paths
If an external cache battery goes low or fails for a controller in a dual-
redundant configuration and preferred paths have been set, that controller’s
units may go available on the “OTHER” controller and become inoperative on
the preferred controller. This causes a mount verify on the units from Compaq
OpenVMS™.
You will need to issue the SET unit-name NOPREFERRED_PATH command
which will allow the units to go out of mount verify. Later you can reissue the
SET unit-name NOPREFERRED_PATH command to the affected units.
6.6 Device Adds, Moves, and Changes
The controller maintains configuration maps of device types and locations and
uses those maps for communicating with devices. If you add, move, or change
devices while the controller is powered off and without changing the controller
configuration first, the controller is not able to work with the changed devices
when it returns to service.
6.7 Tape Drive Firmware Revision
If you are not using HSUTIL to install your new tape firmware, do the
following:
• Before installing a new version of tape drive firmware, delete the tape
drive completely from the controller configuration. You can re-add the
tape drive after the firmware installation is complete. This prevents
interrupts to the drive during the code loading operation.
• After the firmware is installed, refer to the HSZ50 Array Controller HSOF
Version 5.1 Configuration Manual, HSZ50 Array Controller HSOF
Version 5.1 Service Manual, HSZ50 Array Controller HSOF Version 5.1
CLI Reference Manual for adding the tape drive back to the configuration.