VERITAS Volume Manager 3.1 Administrator's Guide

Disk Tasks
Disk Utilities
Chapter 4 151
subdisk level and then take necessary action to make the object
available again. This mechanism detects I/O failures in a subdisk,
relocates the subdisk, and recovers the plex associated with the
subdisk. After the disk has been replaced, Volume Manager provides
a utility, vxunreloc, that allows you to restore the system back to
the configuration that existed before the disk failure. The vxunreloc
utility allows you to move the hot-relocated subdisks back onto a disk
that was replaced due to a failure.
When the vxunreloc utility is invoked, you must specify the disk
media name where the hot-relocated subdisks originally resided.
When the vxunreloc utility moves the subdisks, it moves them to the
original offsets. If you try to unrelocate to a disk that is smaller than
the original disk that failed, the vxunreloc utility does nothing
except return an error.
The vxunreloc utility provides an option to move the subdisks to a
different disk from where they were originally relocated. It also
provides an option to unrelocate subdisks to a different offset as long
as the destination disk is large enough to accommodate all the
subdisks. For more information on using the vxunreloc utility, see
“vxunrelocate Command”.
• vxdiskadd—thevxdiskadd utility and most vxdiskadm operations
can be used only with standard disk devices.