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5.2.3. Preventing Allocation on a Physical Volume

You can prevent allocation of physical extents on the free space of one or more physical volumes with the pvchange command. This may be necessary if there are disk errors, or if you will be removing the physical volume.
The following command disallows the allocation of physical extents on /dev/sdk1.
# pvchange -x n /dev/sdk1
You can also use the -xy arguments of the pvchange command to allow allocation where it had previously been disallowed.