Re: How to read a damaged TK50 tape


"FrankS" <sapienza@xxxxxxxxxx> wrote in message
news:cba4dc60-c171-4169-af8a-ea1ac22ddd82@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Jun 1, 1:41 pm, "Robert Jarratt" <nos...@xxxxxxx> wrote:

Wow, I haven't had to do that in a long time.

The best I can recall is that I did a series of consecutive restores
from the tape, using the /NOREWIND qualifier. If you don't indicate
the specific saveset name then BACKUP will (or at least would, back
when) just process the next one that it finds. Eventually the tape
will move past the bad spots and BACKUP actually finds real data.

Again, though, that was a generation ago. I don't profess to have
done this recently, so maybe BACKUP will behave differently.

You could also play with the $SET MAGTAPE command and see if it allows
you to move past the damaged area of the tape.

I am not too concerned about restoring the damaged saveset and would be
happy to skip past it if I could. BACKUP seemed unable to skip past it
though, is there an option to make it do so? This is the command I used:

BACKUP/NOASSIST MKB300:*.*.* [...]

I have also tried messing around with SET MAGTAPE/SKIP:FILES:n but it seems
unable to skip past the bad saveset, presumably because the TK50 will not go
past the parity error as mentioned elsewhere on this thread. (I have a TK50
and a TZ87, I also have a TK70 but no Q-Bus machine to put it in).

Is there no option to turn off parity checking anywhere? I have checked the
MOUNT, BACKUP and COPY commands but can't see anything. I have yet to try
VMSTPCE, is that my last resort?

I am hoping to avoid the expense of a data recovery service as this is just
a hobbyist thing and the files are from my younger days, it is not a
business issue.

Thanks

Rob


.

Relevant Pages

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