On Thursday 01 February 2007 21:01, Erik P. Olsen wrote:
> Martin Simmons wrote:
> >>>>>> On Thu, 01 Feb 2007 14:50:10 +0100, Erik P Olsen said:
> >>
> >> Maybe I did something really stupid. I ejected an already bacula-mounted
> >> tape and inserted a cleaning cartridge. After the cleaning process was
> >> finished I reinserted the backup tape. I did it without an unmount/mount
> >> cycle. When the backup run later started the tape was ejected with tape
> >> error and it was no longer possible to read the tape because bacula
> >> claimed that it had no volume label and that proved to be true when I
> >> tried to read the tape.
> >>
> >> Why was this proceedue not possible and why was the backup tape
> >> overwritten?
> >
> > It was overwritten because Bacula remembers the tape's position while it
> > is bacula-mounted.  When you ejected the tape, it was rewound without
> > Bacula knowing, so the position was different when you reinserted it.
> >
> > Normally, when you bacula-mount a tape, Bacula knows that the tape is
> > positioned at the start, so it winds the taoe forward to the end before
> > writing the next job.
>
> OK, so I was stupid.
>
> >>                                                                         
> >>     Is it a bug or did I just do something stupid?
> >
> > Do you have AlwaysOpen = yes (the default)in the device config?  If so,
> > then I think the bug is in the OS or tape drive -- it should be
> > impossible to eject the tape while it is mounted (and open) by Bacula.
>
> I have AlwaysOpen = yes but I ejected the tape by pressing the eject button
> on the tape drive.
>
> Thanks for the answer, I've learned a lesson.

Unfortunately, you aren't the first person to whom this has happened.

Bacula version 2.0+ will lock the door on your tape drive, while Bacula is 
using the drive, providing your tape drive/OS permit it.

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