Interestingly I'm seen at my site that a large partition, which might
fit on a tape, can be not-the-first on a tape and hit EOT while being
written, it will then dump to a second volume (if jukebox == 1).

You can have a similar cascading failure if you try to put another
DLE on the end of the second tape volume, rolling onto the third.

You can have a senario where the single DLE would have fit properly
on the 1st tape volume had the large interviening DLE not put put
to tape before it.

taper ordering is a critical thing sometimes.

On Wed, Aug 01, 2007 at 08:55:59PM +0200, Ralf Auer wrote:
> Hi Jon,
> 
> > Not sure I know what part you feel is not true.  You hypothesised
> > a situation where normally every day's dump fit on one tape.  Then
> > on one particular day a single DLE grew enough to cause the day's
> > run to require 3 tapes.  That would only happen if that one DLE
> > were now larger than a single tape (even for an incremental as the
> > scenario is constructed).  With runtapes == 1, amanda would not
> > even start the dump of that DLE.
> 
> Maybe I am completely wrong, but I thought, if the big dump is
> distributed over several partitions, each one with a single entry in the
> disklist and each partition size smaller than the tape capacity, the
> backup should work.
> For instance, my type capacity is 400GB, the specific client has three
> partitions of 350GB each and each partition has its own entry in the
> disklist. So I assumed, that one partition backup would go to the first
> tape, anther one to the second and the third one onto the last tape.
> Since 'tape spawning' is not necessary in this case, I thought that the
> backup would be run by Amanda. But, as I said, I am not sure about that
> and probably you're right...
> 
> 
> 
>       Ralf
---
   Brian R Cuttler                 brian.cuttler AT wadsworth DOT org
   Computer Systems Support        (v) 518 486-1697
   Wadsworth Center                (f) 518 473-6384
   NYS Department of Health        Help Desk 518 473-0773



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