On Wed, 4 Feb 2004 at 11:09am, tobias.bluhm AT philips DOT com wrote

> Joshua Baker-LePain:
> 
> >Your tape write speed would only get cut in half when going to software 
> >compression if the hardware compression had been getting 2:1, which it 
> >almost never does.  And gzip is better than just about any hardware 
> 
> So amtapetype reported a ~ 2x difference because of what - carefully 
> selected data?

amtapetype on a tape drive using hardware compression is rather 
unreliable.  It writes random data, which expands when hardware 
"compressed."  You should never run amtapetype on a drive with hardware 
compression enabled.

-- 
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University