Date: Thu, 1 Jan 1998 14:38:10 -0800 (PST) From: Doug White <dwhite@gdi.uoregon.edu> To: Palle Girgensohn <girgen@partitur.se> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: unattended dump? Message-ID: <Pine.BSF.3.96.980101143257.22261O-100000@localhost> In-Reply-To: <34ABD8A0.EA585392@partitur.se>
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On Thu, 1 Jan 1998, Palle Girgensohn wrote:
> > > I'd like to use dump from crontab. What happens when a tape shift is
> > > required? If I start a dump from the prompt, I can't detach the process
> > > (i.e. no &), or it will stop saying "[1] + Suspended (tty output)
> > > dump". When running it from cron, this seems to work, as long as there
> > > is no need for operator intervention.
> >
> > The process will probably stick up since it has no connected tty (unless
> > dump can handle the ENOTTY error).
> >
>
> Do you mean that it will stick up even if it is run from cron?
As long as it doesn't prompt for a new tape or whatever. If it doesn't
require user intervention it should work fine.
I should disclaim that I've never tried this :-)
> In this case, how do I best run unattended dumps? As a script from the
> console, that wait until a certain time during the night?
> I've tried this with more than one tape, and the result is the same. 4GB
> into the tape, I get write error. Obviously, I hit the tape end. The
> model is a Seagate Hornet CTT8000. I have read the manual, and from what
> I can comprehend, there's no built-in hardware compression. Still,
> Seagate present fact & figures on how much it stores with hardware
> compression. odd... Anyway, I guess 4GB is the limit, unless there's
> some way to do software compression. I guess 'tar z...' might work, but
> I like dump a lot better than tar...
Echo. You might bother Seagate on that. You should also check the
density codes; I think one of those actually enables the hardware
compression. Check the mail archives.
> Is there any way to fix the end-of-media indicator on the tape?
New tape.
> I use 'dump 0uabf 64 /dev/nrst0' and get the following:
>
> DUMP: 57.03% done, finished in 0:22
> DUMP: write error 1048256 blocks into volume 1
> DUMP: Do you want to restart?: ("yes" or "no")
>
> I'd rather have the option to continue on a new tape.
> > try adding the `a' option:
>
> Sorry, I remebered wrong. I do use the 'a' option.
Odd. In that case, use the B option to list how many blocks fit on a
tape.
Doug White | University of Oregon
Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite | Computer Science Major
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