🚀 go-pugleaf

On Thu, 2 Jul 1992 18:05:18 BST James Watts said:
>I am sorry if this question has been asked many times before, but i have
>only subscribed to this list as i havnt got an answer anywhere else.
>
>My problem is that one of our vmarchive PRIMARY volumes has become corrupted.
>The TWIN volume is fine, but what i want to do is create a new primary from
>the existing twin.
>
>I have seen that archive utility VMADBR can do this with the COPY command, but
>this requires 3 cartridge (tape) decks and we do not have that here. I cannot
>see why it should need to create both new primary and twin volumes, as we
>already have the twin.
>
>I have tried to do a normal style tape copy, but the volume in question is
>the BASE volume of a set of two. This seems to be causing problems with the
>copying. When a copy is made, and used it mounts ok and is recogonised by the
>system, but when the tape runs of the end it fails  saying that
>an error occured reading the tape TRAILER LABEL.
>
>Possibly if somebody could describe the format of an archive volume then i
>could patch (bodge) one together. Is there an EOT mark between the end of the
>data and the trailer label, and is the trailer label anything special
>or is it just a file type thing.
>
>Any help would be appreciated.
>Jim
>
Use vmampu to do the copy and instead of using cart as output use reel.
After you have created the reel use the reel as input and create a cart as
output using vmampu to copy from reel to cart.
chris