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

Release Notes
AA–R1ZZE − TE Page 83
Various configuration events cause the controller to write the configuration
data to save configuration area. If the controller overwrites file system data,
the results vary depending on the platform operating system and the
application.
If a disk which has this problem is moved to a controller running HSOF
Version 51Z or Version 52Z software before the differing file system and
controller view of the disk capacity is resolved, and the file system tries to
access the save configuration area, the controller returns an error to the
operating system. The action that the operating system takes upon receiving
this error varies depending on the platform, but could include rendering the
entire file system or database inaccessible.
10.1 How to Detect Whether You Have This Problem
The problem described in this appendix affects single-disks units in JBOD
configurations with save configuration data stored on them. If you have not
moved JBOD disk units with save configuration data saved on them to the
HSZ50 controller being upgraded to V5.7, do not proceed any further. Your
system is not at risk.
If disks in your system are at risk for this problem, use the following procedure
to check a disk in JBOD configuration to determine whether it is exposed:
1.
At the controller prompt, type SHOW DISKnnn (where nnn is the JBOD
disk in question).
2.
Look for a "Configuration being backed up on this container" message.
3.
Record the block size capacity displayed by the controller.
4.
From the Compaq Tru64 UNIX prompt on one of the hosts, type the
following commands (rrza18c is used in the following example as the
device in question):
# disklabel -rw /dev/rrza18c HSZ20
# disklabel -r /dev/rrza18c
# /dev/rrza18c: