Veritas Volume Manager 5.0 Troubleshooting Guide Guide (September 2006)

95Error messages
Understanding messages
■ Case 2: If disks have been duplicated by using the dd command or any similar
copying utility, you can use the following command to update the UDID for one
or more disks:
# vxdisk [-f] updateudid disk ...
This command uses the current value of the UDID that is stored in the Device
Discovery Layer (DDL) database to correct the value in the private region. The
-f option must be specified if VxVM has not set the udid_mismatch flag on
a disk.
For example, the following command updates the UDIDs for the disks
c2t66d0 and c2t67d0:
# vxdisk updateudid c2t66d0 c2t67d0
■ Case 3: If DMP has been disabled to an array that has multiple paths, then each
path to the array is claimed as a unique disk.
If DMP is suppressed, VxVM does not know which path to select as the true
path. You must choose which path to use. Decide which path to exclude, and
then select item 1 (suppress all paths through a controller
from VxVM’s view) or item 2 (suppress a path from VxVM’s
view) from
vxdiskadm option 17 (Prevent multipathing/Suppress
devices from VxVM’s view
).