On Tue, May 06, 2008 at 10:30:55AM +1000, Nigel Allen wrote:
> Hi All
> 
> I'm experiencing an odd problem with a USB DAT drive that keeps running 
> out of space. Apologies for the length of the post.
> 
> The drive is supposed to be 36 / 72 GB.

It is 36 GB.  Maybe minus a bit for marketing lies<<<<exaggeration.

But you are compressing the data with bzip2 then
telling the hardware to try to compress it further.
The hardware compressor actually expands already
compressed data by 5-15%.  Thus your tape can only
hold about 31 GB of this type of processed data.

And guess what?

> >NOTES:
> >  planner: Forcing full dump of 
> >  mail.XXXXXXXX.com.au:mapper/VolGroup00-LogVol00 as directed.
> >  taper: tape DailySet1-18 kb 31022240 fm 2 writing file: No space left on 
                              ^^^^^^^^^^^

Amanda runs out of tape at about 31 GB.


> Any idea where I can start would be appreciated (apart from "bigger 
> tape" or "less data").

See, you knew the solution all on your own.

-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
 JG Computing
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