>>>>> On Sat, 3 Feb 2007 22:01:00 -0800, Tauren Mills said:
> 
> I'm not having file size issues of 17GB on disk.  I'm talking about
> the data written to tape is about 17GB or 18GB.  It seems like the
> tape drive isn't compressing the data.  But if it isn't, why would it
> not get closer to 20GB?  Or is there some sort of 2-3GB overhead
> incurred in the backup process?

It sounds like you are writing incompressible data (maybe already compressed?)
with the tape drive set to compress.  DAT compression always expands the data
by >10% in these cases :-(

__Martin

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