On Wednesday 08 January 2014 17:47:03 Jon LaBadie did opine:

> On Wed, Jan 08, 2014 at 02:11:15PM -0500, Gene Heskett wrote:
> > On Wednesday 08 January 2014 13:13:43 Brian Cuttler did opine:
> ...
> 
> > > Also - Isn't there another level of tape header that needs to be
> > > cleared? Isn't re-writing the tape with compression off a little
> > > bit of a trick? If you don't clear that other level of header, then
> > > the compression is determined by the header info and not by the
> > > device type selected when you write the tape?
> > 
> > This has been true for me Brian.  What I have found that works to shut
> > it off for good:
> > 
> > rewind the tape
> > dd the 1st 32k block to a scratch file
> > rewind the tape.
> > execute the hardware compression off command _for_ _your_ drive.
> > dd that scratch file back to the tape.
> 
> Untested as I haven't experienced the problem, but I feel the
> procedure could be rewind, hw compression off, dd any significant
> amount of data, probably from /dev/random, would work as well.
> I.e. just get some uncompressed data first on the tape.
> 
> Jon

My way kept the tape recognizable as an amanda tape. You could put it right 
back into the rotation. Only reason really.

Cheers, Gene
-- 
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