Deb
> On Jan 8, 2014, at 4:57 PM, "Gene Heskett" <[email protected]> wrote: > > 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 I do what Jon has mentioned. Therefore, I do it when I'm about to overwrite a tape anyway, or when I'm labeling a new tape. Yes, brand new tapes self identify as "HW compression on" even straight ought of their package. For me anyway. And after I DD 3000 blocks or so of random from /dev/random they identify as having HW compression off. So I do the process. It makes me feel better, anyway! Deb Baddorf > > My way kept the tape recognizable as an amanda tape. You could put it right > back into the rotation. Only reason really. > > Cheers, Gene > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Genes Web page <http://geneslinuxbox.net:6309/gene> > > Barker's Proof: > Proofreading is more effective after publication. > A pen in the hand of this president is far more > dangerous than 200 million guns in the hands of > law-abiding citizens.
