> 
> On Monday 23 March 2009 12:29:04 James Harper wrote:
> > I tried the following:
> > 1. Full Backup (to disk)
> > 2. Incremental Backup (to disk)
> > 3. Incremental Backup (to disk)
> > 4. VirtualFull Backup (to tape)
> > 5. Incremental Backup (to disk)
> > 6. VirtualFull Backup (***)
> >
> > That last VirtualFull seems to want the tape media used in (4) as a
> > source instead of the disk volume used in (1), but obviously that is
> not
> > going to work and I get the following:
> 
> Yes, clearly it wants the tape media (4).  That is the last Full
> backup, and
> the Incremental (5) was done relative to it.
> 
> You haven't given enough information to really analyse what is going
> on, but I
> can guess. For example, I don't know what Volumes were used at each
> stage.
> 
> On your Incremental (5) it looks like you have specified the input
> storage to be Disk when it is in fact tape.

No. All the Incrementals definitely went to disk.

> 
> If you want to do multiple Virtual Backups, I don't think it is going
> to work
> by mixing media.  This probably should be documented but is not.  I
> believe
> that it will work much better if you keep everything on the same Media
> Type.
> Or you will need to run subsequent Virtual Full specifying Tape as the
> input
> device.
> 
> Possibly there is a problem with doing multiple Virtual Full backups.
> One of
> the conditions for successful Virtual backups is that the input Pool
> and
> output Pool (read and write) must be different.  We have a test case
in
> the
> regression scripts called virtual-backup2-test, which does multiple
> Virtual
> Full backups.  It accomplishes it by moving the Volume the Full was
> written
> on to a different Pool.  This permits keeping the input and output
> pools
> different.

Shouldn't the virtual full backup only consider 'source' backups in the
original pool though?

All my incremental and full backups are in a pool called 'Disk'. The
behaviour I was expecting was that the last VirtualFull would use data
from 1, 2, 3, and 5.

James


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