HP -UX 11i Administrator's Manual page 125

NOTE: There might be an instance where you see that only the failed physical volume holds the
current copy of a given extent (and all other mirror copies of the logical volume hold the stale data
for that given extent), and LVM does not permit you to remove that physical volume from the volume
group. In this case, use the lvunstale command (available from your HP support representative)
to mark one of the mirror copies as "nonstale" for that given extent.
HP recommends you use the lvunstale tool with caution.
Based on the gathered information, choose the appropriate disk removal or disk replacement
procedure, detailed on the following pages. The possible scenarios are:
"Step 5: Removing a Bad Disk" (page 126)
"Step 6: Replacing a Bad Disk (Persistent DSFs)" (page 129)
"Step 7: Replacing a Bad Disk (Legacy DSFs)" (page 138)
Disk Troubleshooting and Recovery Procedures 125