VMS command question and help, off-topic

From: Kevin Handy <kth_at_srv.net>
Date: Sat Jan 18 18:32:01 2003

Adrien Farkas wrote:

>Hello VMS folks,
>
>just a very simple question, what does a command like this do:
>
>BACKUP MULTIA_V72.BCK/SAVE DVA0:/IMAGE/VERIFY
>
That takes a backup file (multia_v72.bck) from the current directory,
and restores it onto DVA0:, and then makes a second pass to verify
what it put there matches what's in the saveset.

>
>(it's alpha vms, so not sure whether floppy is named DVA0: on VAXen,
>too).
>
The controller specifies the name of the floppy drive, so it can
vary from machine to machine.

>
>I know basicaly what this does, my question is whether the .BCK file has
>some special format or whether UNIX command like this:
>
> $ cat MULTIA_V72.BCK > /dev/diskette0
>
>or
>
> $ dd if=MULTIA_V72.BCK of=/dev/diskette0
>
>is equivalent.
>
>
Nope. It is a special format, and not the same format as a disk image.

>If it's some special format, were it possible that you issue this
>command for me on some VMS and grab the diskette raw file and make it
>available for me? the image is available at
>http://www.kotelna.sk/freddy/multia_v72.bck (1419264 bytes).
>
>Cheers,
>
>
Sorry, no floppy drive available to me...
Received on Sat Jan 18 2003 - 18:32:01 GMT

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