The Question is:
Is there a remedy for multiply allocated blocks that are detected by the
The Answer is :
Write-lock the disk immediately. Consider performing an immediate
off-line BACKUP/PHYSICAL of the volume involved. (This so that any
repair attempts that might be made and might fail can be undone or
can be retried.)
Assuming that the particular file contents are of concern, you must
restore the file contents from a consistent backup copy, or manually
reconstruct the file contents from the existing corrupted file and
from knowledge of the expected contents and of the file structure.
The former is the easier of the approaches, obviously.
There are cases when the corruptions have been reported within temporary
or unneeded files, and these can obviously be safely deleted without
restoration or reconstruction.
ANALYZE/DISK_STRUCTURE/REPAIR will correct the block allocation error,
though it may not remedy the actual cause of the allocation error.
Please ensure that you have the mandatory ECO kits for the particular
OpenVMS release in use -- OpenVMS Alpha V7.3, in this case -- installed.
The HP services organization may be able to offer assistance in salvaging
or in otherwise reconstructing the contents of the particular file(s) and
the volume(s) involved.