Date: Fri, 15 Apr 2005 12:10:25 -0300 From: Christian Robottom Reis <kiko@async.com.br> To: "Justin T. Gibbs" <gibbs@scsiguy.com> Cc: AIC7xxx Mailing List <aic7xxx@freebsd.org> Subject: Re: 2940A failing mt operations with Medium Error Message-ID: <20050415151025.GE11591@www.async.com.br> In-Reply-To: <41D76B9E487CACA46E899923@caspian.scsiguy.com> References: <20050415132335.GA11591@www.async.com.br> <41D76B9E487CACA46E899923@caspian.scsiguy.com>
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On Fri, Apr 15, 2005 at 08:34:38AM -0600, Justin T. Gibbs wrote: > > We're having a problem with our SDT-9000 DDS-3 tape drive, which is > > attached to a rather puny 2940A. We had it installed on a little Pentium > > MMX and it was working fine, but since moving it last week to a more > > modern machine, we've been getting error on all mt operations. The > > kernel complaint is below. This is what I'm running: > > > > scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.3.9 > > <Adaptec 2940A Ultra SCSI adapter> > > aic7860: Ultra Single Channel A, SCSI Id=7, 3/253 SCBs > > Vendor: SONY Model: SDT-9000 Rev: 0601 > > Type: Sequential-Access ANSI SCSI revision: 02 > > st: Version 20040102, bufsize 32768, max init. bufs 4, s/g segs 16 > > > > The messages below indicates a Medium Error/Cartidge fault, but no > > matter if I try with a new cartridge or old, the same error ensues. > > The timeout messages from the ahc driver indicate that the tape > drive is failing to complete a transaction that is in the disconnected > state. This often happens if the tape drive is stuck in a retry > loop trying desparately to either read or write data and thus > neglects to complete a transaction before the OS command timeout > fires. Interesting. Could it be a matter of us just waiting too little, or is something definitely wrong with the hardware? > You might try running a cleaning cartridge through your > drive. I have already -- a few times, actually. Every time I've tried with a new tape I've run a cleaning cartridge; hasn't seemed to make much of a difference. Take care, -- Christian Robottom Reis | http://async.com.br/~kiko/ | [+55 16] 3361 2331
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