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 -- Jon H. LaBadie j...@jgcomp.com 11226 South Shore Rd. (703) 787-0688 (H) Reston, VA 20190 (609) 477-8330 (C)
