Date: Sun, 25 Jan 2004 11:47:32 -0800 (PST) From: Doug White <dwhite@gumbysoft.com> To: Roberto Nunnari <roberto.nunnari@supsi.ch> Cc: freebsd-current@freebsd.org Subject: Re: problem with scsi device Message-ID: <20040125114516.Y81485@carver.gumbysoft.com> In-Reply-To: <40128AD4.9020401@supsi.ch> References: <400EC37A.6000505@supsi.ch> <20040123120622.C61090@carver.gumbysoft.com> <40128AD4.9020401@supsi.ch>
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On Sat, 24 Jan 2004, Roberto Nunnari wrote: > Thanks for your reply. I was convinced that it was a hardware problem, too.. > ..so I installed another OS on that same machine.. just to > make sure it was a hardware problem.. big surprise! it worked > without a problem.. ..went back to FreeBSD and the problem > is again there.. > > Do you believe that even after that it could still be a hardware > problem? or a mix of hardware bug and software bug? May it be that > FreeBSD software uses some buggy hardware features that the other > OS just don't use? Thats entirely possible, or some other SCSI command triggers a firmware bug that makes the drive spaz out. We went around for 6+ months with SpetraLogic and Sony on a firmware problem on the AIT-2 drives that ADSM triggered. It pretty much came down to getting a SCSI recorder to see what the offending transactions were, getting that sent off to Sony, and Sony issuing a fix. By the time it got fixed, the company was in the process of being acquired, and that whole backup setup got repurposed. :) You might check if there is a firmware update for your drive. > > Doug White wrote: > > On Wed, 21 Jan 2004, Roberto Nunnari wrote: > > > > > >><ARCHIVE Python 06408-XXX 9050> Removable Sequential Access SCSI-3 device > > > > > >>it seams that if I use a new tape, then I can dump on it.. > >>but if I try to overwrite the tape, it starts behaving funny. > >>also.. anytime I try to write to a non new tape, it will > >>make errors and turn on the dirt led. > >>The result is that it's not possible to make any reliable > >>dump/restore on it. > >> > >>the tape drive is less than 1 year old and the tapes are > >>of good quality. > > > > > > My experience with this on DLT tapes is that this is caused by a damaged > > head assembly or something is seriously out of alignment. In other words, > > its not something you can fix. If it is less than a year old, then it > > should still be under warranty. I suggest you take advantage of that. > > > > > -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org
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