Bacula-users

Re: [Bacula-users] Volume Relabelling

2009-01-19 11:50:29
Subject: Re: [Bacula-users] Volume Relabelling
From: Alan Brown <ajb2 AT mssl.ucl.ac DOT uk>
To: Pasi Kärkkäinen <pasik AT iki DOT fi>
Date: Mon, 19 Jan 2009 16:47:47 +0000 (GMT)
On Mon, 12 Jan 2009, Pasi Kärkkäinen wrote:

> > Can a (disk) volume be automatically relabelled when it is recycled?
> >
>
> I don't think that's supported atm..
>
> I'd like to have that feature too. It shouldn't be too hard to implement..

A recycled volume is still only a candidate for being written on. Volumes
are labelled when they're moved from recycle to append.

The decision to not relabel tapes until the last possible moment is
deliberate.

This gives a last-possible-moment for recovering data off a tape which
have been wiped from the database, using the various bacula command line
utilities.

It also reduces excessive tape handling. Bear in mind that media like LTO
has a chip onboard and counts each load/unload cycle towards the end of
the tape's lifetime (162 cycles(*)) even if only the very beginning of the
tape has been read/written.

(Yes, this means the "lifetime warranty" on LTO media has different
real-world durations depending on the purposes the tapes are put to.
Other media has similar limitations)





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