On Wed, Jul 25, 2007 at 01:45:06PM -0500, Dustin J. Mitchell wrote:
> On Wed, Jul 25, 2007 at 08:11:21PM +0200, Stefan G. Weichinger wrote:
> > Ralf Auer schrieb:
> > > Hi everybody,
> > > 
> > >   I'm trying to use two physical tape drives (HP Ultrium 960) with
> > > Amanda. According to the manual, I could use a tape changer (e.g.
> > > chg-multi) to get the job done, but that would write only to one disk at
> > > a time, right?
> > > 
> > > I do not want to split my backup in two different configurations, so
> > > maybe you know a way how to use both tapes simultaneously in one
> > > configuration? I am pretty sure, it can be done, because otherways the
> > > 'runtapes' option in amanda.conf would not make much sense, I think...
> > > 
> > > Unfortunately I did not find anything helpful about that issue in the
> > > manual or the mailing list.
> > > 
> > > At the moment I am using Amanda 2.4.5 on Ubuntu 5.10 & FC3 but I would
> > > not mind to upgrade if a newer Amanda version is needed for this feature.
> > 
> > RAIT:
> > 
> > http://www.amanda.org/docs/rait.html
> > http://wiki.zmanda.com/index.php/How_To:Set_Up_RAIT_(Redundant_Array_of_Independent_Tapes)
> 
> I should have mentioned RAIT, but note that with two tape drives RAIT
> will only do mirroring, not striping.
> 

Unless things have changed, I believe the third drive can be /dev/null.
It will serve as a non-existant parity drive.

-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
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