topic Re: change disk label vms 7.3-1 in Operating System - OpenVMS

change disk label vms 7.3-1

Tim Nelson — Mon, 06 Jun 2005 13:42:44 GMT

This should be easier than it is. Sorry for the simpleton question.

I have an unmounted disk labeled disk1. I also have a mounted disk called disk1. I would like to re-label the unmounted disk to something else. I see I can do this with the set volume/label= command but it only works when the volume is mounted. I cannot mount the first disk as the second disk already has the same name and a duplicate volid error would occur.

Any suggestions ? Clear as mud ?

Re: change disk label vms 7.3-1

Garry Fruth — Mon, 06 Jun 2005 13:57:37 GMT

You should be able to mount one disk locally to your process, and the other group or system. You can change either one of them at that point.

Re: change disk label vms 7.3-1

Mike Smith_33 — Mon, 06 Jun 2005 13:58:50 GMT

If you mount the disk privately then you should be ok to change it.

mount /over=id $1$whatever

set volume/label=whatever $1$whatever

I have had to do this once or twice.

Re: change disk label vms 7.3-1

comarow — Mon, 06 Jun 2005 14:07:26 GMT

Yes, just mount it privately and
mount/over-id
then set vol/label = yourlabel

You can't have two disks with the sanme label mounted in a system or cluster.

Re: change disk label vms 7.3-1

Tim Nelson — Mon, 06 Jun 2005 14:08:15 GMT

I guess I did not think of the obvious. So mounting privately does not conflict with the same label mounted to the cluster ?

Told you this was an easy one.

Thanks !!!

Re: change disk label vms 7.3-1

Uwe Zessin — Mon, 06 Jun 2005 14:17:27 GMT

The volume is differently represented in the name space of the lock manager and in the logical name space:
$ show logical DISK$*

If I recall correctly, cannot try this out now, the volume protection is also different:
$ show device /full d...

But that's not a real protection as somebody with massive privileges can bypass a private mount.

-----

This ability can also be a mis-feature as I found out the hard way:
- had a system disk with label A
- had another (system) disk with label A, too
- booted from first system disk
- privately mounted second disk
- did a PRODUCT INSTALL with files from second disk

** poof ** corruped the second disk, because PCSI used the mount logical name DISK$A and the first entry was in the process logical name table pointing to the second disk :-(

Oh well, you can never have enough backups...

Re: change disk label vms 7.3-1

Tim Nelson — Mon, 06 Jun 2005 14:51:11 GMT

Thanks everyone.

Cheers.

Re: change disk label vms 7.3-1

Tim Nelson — Mon, 06 Jun 2005 14:51:35 GMT

mount privately