[Gllug] How much space left on a tape...

[John G Walker]

On Tue, 05 Dec 2006 20:33:19 +0000 Adrian McMenamin
<adrian at newgolddream.dyndns.info> wrote:

> > I don't know the answer to that, but maybe you should use tar -L ?
> > 
> >  From the manpage:
> > 
> >        -L, --tape-length=NUMBER
> >               change tape after writing NUMBER x 1024 bytes
> > 
> >   
> 
> Sorry, my original message was unclear. What I mean is I am doing
> weekly or so backups on 4GB tapes - the DAT drive capacity is 4GB.
> How do I know how close I am to this routine needing to be changed?

Maybe I should be corrected on this, but my understanding of salsaman's
suggestion is that, after NUMBERx1024 bytes written to the tape, the
backup routine will ask for a second tape to be mounted.

When calculating NUMBER, allow for some bad patches on the tape. Divide
1024 into a slightly smaller number than 4GB to ensure that you don't
run out of tape before the routine asks for the next one to be loaded,
 
-- 
 All the best,
 John
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