topic Re: How to navigate through tape records in VMS in Operating System - OpenVMS

How to navigate through tape records in VMS

Patrick_42 — Mon, 09 Jun 2003 01:37:59 GMT

Dear all,

I Unix, i can navigate tape records using mt like:

mt -f /dev/rmt/0mn fsf 2

will move the tape advance 2 tape records for furhter manipulation like tar, cpio, etc.

How can i do the same in vms ?

Thanks!

Patrick.

Re: How to navigate through tape records in VMS

Mac Lilley — Mon, 09 Jun 2003 08:12:07 GMT

Patrick

You can use the SET MAGTAPE command with the /SKIP qualifier. The tape must first be mounted /FOREIGN. To get details of the options available do HELP SET MAGTAPE /SKIP.

Mac

Re: How to navigate through tape records in VMS

Guy Peleg — Mon, 09 Jun 2003 10:42:10 GMT

Patrick,

Assuming the name of you tape driver is MKA500:

$ MOUNT/FOREIGN MKA500:
$ SET MAGTAPE/SKIP=FILE:2 MKA500:

Guy

Re: How to navigate through tape records in VMS

Terry Yeomans — Mon, 24 Nov 2003 11:58:39 GMT

If the tape has been backed up using savesets then:
BACKUP/LIST tapedrive:
This will run to the end of the current saveset.
Type the command again for every saveset until you get an error saying there are no more savesets on the tape.
Terry.

Re: How to navigate through tape records in VMS

Antoniov. — Mon, 24 Nov 2003 13:08:41 GMT

HI Patrick,
I don't known unix so I read HP-UX V11 reference guide to mt; I think Guy post right command list.
Bye
Antoniov

Re: How to navigate through tape records in VMS

Dieter Rossbach — Tue, 25 Nov 2003 02:18:45 GMT

It depends very much on the way, the tape was writen.

1. on a non-VMS-System, use the set magtape/skip-method
2. on VMS with copy:
Do a
$ mount magtape: label
/in case you don't know the label and have some rights on the system you can use
$ mount /over=id magtape:
as well)
$ DIR magtape:
to get a listing of the files on tape and the copy them to disk using:
$ copy magtape:filename disk:
3. on VMS using backup:
you can either
$mount /for magtape:
$backup /list magtape:
as written before or
$ mount magtape: label
$ dir magtape:
to get a list of the backup files
$ dismou/nounload magtape
$ mount/for magtape
$ backup magtape:filename ...
to read a specific saveset.

Regards

Dieter