10 Aug
2003
10 Aug
'03
8:23 p.m.
I have several disk paks that are clearly marked RSTS 7.1 Image Data Backups.
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...
Thanks,
Curt
11 Aug
11 Aug
11:58 a.m.
Curt,
At 10:30 PM -0700 8/8/03, cvendel(a)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
9:29 p.m.
I have several disk paks that are clearly marked RSTS
7.1 Image Data
Backups.
Just a thought (experts?), but given the label they may be
more Backup format than RSTS format (at least at the first
level). What I don't know is if VMS restore understands RSTS
backups.
<plug> BTW if someone has RSTS for an 11/23 I
could look myself at the problem for you. </plug>
John A.
12 Aug
12 Aug
12:50 p.m.
John Allain wrote:
Did 7.1 use the old or the new backup? You may also be looking
at a SAVRES image.
If it is the older version, which sounds likely from your description,
the only way you will ever read it is by using a RSTS/E system.
The old backup wrote to the disks in a raw format (no directory
structure) laying out everything in its own special format.
SIMH would be useful for reading this if you can create images
of the packs.
You might be able to read them on VMS by getting
the source code to BACKUP (written in BASIC+, and should be
available on the RSTS/E distributation) and getting it
to run there, but getting it to work is probably much harder
to do than just using simh to run RSTS/E and restoring the images.
If it is a SAVRES backup, then a real RSTS/E system (or a
simh one) is about the only way to read them. I think you
also need to restore them on the same media they were
backed up from, as SAVRES was an image copy of the
original disk.
The newer backup is (mostly) compatible with VMS backup,
and VMS file structires.
I have several
disk paks that are clearly marked RSTS 7.1 Image Data
Backups.
Just a thought (experts?), but given the label they may be
more Backup format than RSTS format (at least at the first
level). What I don't know is if VMS restore understands RSTS
backups.
<plug> BTW if someone has RSTS for an 11/23 I
could look myself at the problem for you. </plug>
6 p.m.
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.
7:01 p.m.
At 2:56 PM -0700 8/12/03, Antonio Carlini wrote:
OpenVMS VAX (but not OpenVMS Alpha) will mount ODS-1 filesystems,
isn't that what RSTS uses or was that just RSX?
RSX. RSTS never used any such filesystem. RDS-0, RDS1 and RDS1.1.
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. I also *thought* that RSTS switched, at some stage, to
using a
BACKUP format that was compatible with that used by OpenVMS.
Similar, don't know how compatible. Around the V8 or V9 timeframe. Quick
check of the docs should confirm. In V7 and prior, SAVRES.
John
7834
days inactive
7836
days old
5 comments
5 participants
participants (5)
-
allain＠panix.com -
arcarlini＠iee.org -
cvendel＠att.net -
dundas＠caltech.edu -
kth＠srv.net