VMS Multitape Backup Restores

NOTE: This should only be necessary if you are trying to restore VMS executables or data files that were incorrectly created in VMS native format.

VMS multitape backup restores are just like single tape restores except that the external and vault tape labels aren't the same as the internal label. Since the backup program requests the tape by it's internal label, the operators have to be able to translate the request in order to mount the correct tape.

find a tape drive to use:

D0GS01-AMJ>sh dev mk
Device            Device      Error    Volume      Free   Trans Mnt
 Name             Status      Count     Label     Blocks  Count Cnt
D0GS01$MKA400:    Online          0
D0GS01$MKA500:    Online          0

find some disk space, you must have write privileges:

D0GS01-AMJ>sh dev scratch:
   scratch02:[scratch.lconey] is another possibility
D0GS01-AMJ>set default scratch:[scratch.lconey]
D0GS01-AMJ>dir/size/total [...]

define a temporary logical so that the top level of the restored directory tree is at the top level as seen using the logical:
```
D0GS01-AMJ>def/trans=conc temp scratch02:[scratch.lconey.]
```
set default to the top level of the new directory tree:
```
D0GS01-AMJ>set default temp:[000000]
```

Determine tape labels needed:

   
http://www-d0.fnal.gov/d0disks/vms2unix/d0tngbackup.html
        for d0tng disks;

http://www-d0.fnal.gov/d0disks/vms2unix/fnald0backup.html
        for fnald0 disks.

Send mail to operator@fnal.gov with the information, something like:

-------- Original Message --------
Subject: 8mm tapes needed on D0GS01
Date: Mon, 27 Mar 2000 11:14:33 -0600
From: Alan M Jonckheere 
Organization: D0 at Fermilab
To: operator@fnal.gov
CC: jonckheere@fnal.gov

I need to restore files from a 2 tape backup save set onto D0GS01 (VMS).
Since these are 2 volume tapes, the internal and external volume labels
don't agree, especially for the 2d volume. The tapes I'll be mounting
and all *three* lables are:

vault label       external label        internal label
COP333            COP333                P333
COQ333            COP33302              P33302

NOTE: the backup program will request that volume lable P33302 be
mounted. Please mount the COQ333 = COP33302 tape at that point.

If you have any questions/problems, please give me a call.

Alan Jonckheere (D0) x3158

-----------------------------------------------------------------------

if you are having problems, that is, the wrong tapes have been mounted, call the operators at x2746. Be nice, don't bug them. Discuss what you are doing and what you need. They are very helpful if they understand what's going on.

allocate the chosen tape drive:

D0GS01-AMJ>allocate d0gs01$mka400
%DCL-I-ALLOC, _D0GS01$MKA400: allocated

get the first tape mounted (NOTE this command wrapped)

D0GS01-AMJ>mount/for/comment="Please mount tape label COP333, readonly"
           D0GS01$MKA400:
%MOUNT-I-OPRQST, Please mount device _D0GS01$MKA400:
Please mount tape label COP333, readonly
%MOUNT-I-OPRQSTCAN, operator request canceled
%MOUNT-I-OPRQST, Please mount device _D0GS01$MKA400:
Please mount tape label COP333, readonly
%MOUNT-I-OPRQSTCAN, operator request canceled
%MOUNT-I-OPRQST, Please mount device _D0GS01$MKA400:
Please mount tape label COP333, readonly
%MOUNT-I-WRITELOCK, volume is write locked
%MOUNT-I-MOUNTED, P333 mounted on _D0GS01$MKA400:
%MOUNT-I-RQSTDON, operator request canceled - mount completed
successfully

[optional] to get a permanent log file of the restore:

D0GS01-AMJ>define SYS$OUTPUT restore_p333.log
    redirects the output of the /log qualifier to a file

start the restore. To do the entire disk:
```
D0GS01-AMJ>backup/log/label=p333 d0gs01$mka400:/save [*]/by_owner=parent
```
You can chose specific files, by adding a file spec to the tape drive name. You can use wildcards in the file spec, but be careful, if you need to specify any part of the directory path, you MUST have it correct. Get the full name from the .list file on d0chb. You can *exclude* files via:
```
       /exclude=(file_spec[,...])
See
       HELP BACKUP

for details.
```
If you haven't done the output redirection, you'll see the files being restored and you should see the mount requests and successful mounts of the 2nd and 3rd tapes.

when done:

D0GS01-AMJ>deassign SYS$OUTPUT
    closes the output redirection file
D0GS01-AMJ>dismount d0gs01$mka400
D0GS01-AMJ>deallocate d0gs01$mka400

to keep the scratch disk cleanup program from deleting your files before you can work on them:
```
D0GS01-AMJ>rename [...]*.*;* *.*;*
```
This is the equivalent of "touch" on Unix. DO NOT use this as a general practice. It defeats the scratch cleanup and will make other users of the system extremely peeved when the disk fills up.

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Last modified: Tue Mar 28 10:38:01 CST 2000