reading rsts 7.1 disks from OpenVMS

From: John A. Dundas III <dundas_at_caltech.edu>
Date: Mon Aug 11 10:58:00 2003

Curt,

At 10:30 PM -0700 8/8/03, cvendel_at_att.net wrote:
>I have several disk paks that are clearly marked RSTS 7.1 Image Data Backups.

Please save, don't destroy. What flavor pack?

>Openvms Exchange says that they are not DOS11 or RT11 or Files-11 format.
>
>So is there anyway way for OpenVMS to mount and read these disks, I've
>scoured the search engines and haven't come up with anything yet...

I hope to be proven wrong, but... I'm not aware of any software to read
RSTS file systems of that vintage for the VAX.

Two ideas come to mind:

1) copy the packs, block for block (VMS can mount these "foreign", also
read-only, and then copy them), and move the image copy to a machine
running SIMH. Use the available RSTS 7.0 to restore the backups to an
appropriately simulated disk. This is probably a good idea regardless of
2).

2) If you are handy with programming, write a program to traverse the file
structure. It's not too hard. If you work from Mike Mayfield's V8
internals book <http://elvira.stacken.kth.se/rstsdoc/rsts-doc-v80/>, and
pay attention the the changes between 7 and 8 (many!), you should be able
to recover individual files (unless the files are SAV/RES anyway, in which
case 1) is better). I have the V7 Mayfield book (but haven't scanned it
for the 'net yet) and wrote a program on the Mac to read the V7 (RDS-0)
structure. So it _can_ be done.

Good luck,

John
Received on Mon Aug 11 2003 - 10:58:00 BST

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