Date: Fri, 10 Aug 2001 21:31:00 -0400 From: Mike Tancsa <mike@sentex.net> To: kc5vdj@yahoo.com, mjacob@feral.com Cc: scsi@freebsd.org Subject: Re: SCSI timeout problems going from May23 to July13 kernel Message-ID: <5.1.0.14.0.20010810212917.03450108@192.168.0.12> In-Reply-To: <3B7477E3.81FC089C@yahoo.com> References: <20010716092359.F96667-100000@wonky.feral.com>
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At 07:10 PM 8/10/2001 -0500, Jim Bryant wrote:
>Matt, has any progress been made on EOT/EOM detection yet? I haven't
>tested this recently.
Hi,
I posted a follow up to this. The issue in the end was the tape drive not
reliably detecting the density of a blank DDS3 tape in a DDS4 drive when
switching tapes back and forth. I think its more of an issue with the
hardware than the driver per se.
---Mike
>Matthew Jacob wrote:
> >
> > Timeouts were lengthened, not shortened recently. This looks like it
> timed out
> > on the test read in samount...... that's a four (4) minute timeout.
> >
> > The tape driver is very broken in a lot of ways.
> >
> > Use the scsi_sa.c that's on my web page on freebsd.org
> >
> > (http://people.freebsd.org/~mjacob/scsi_sa.c)
> >
> > with a CAMDEBUG kernel that has camcontrol -Ic N:0:0 (you'll have to supply
> > the N for the ordinal bus number the tape is on) and ship me the output.
> >
> > -matt
> >
> > On Mon, 16 Jul 2001, Justin T. Gibbs wrote:
> >
> > > >Jul 16 09:31:20 backup2 /kernel: (sa0:ahc0:0:0:0): SCB 0x9 - timed out
> > > >while idle, SEQADDR == 0x8
> > >
> > > ...
> > >
> > > >Jul 16 09:31:20 backup2 /kernel: (sa0:ahc0:0:0:0): Queuing a BDR SCB
> > > >Jul 16 09:31:20 backup2 /kernel: (sa0:ahc0:0:0:0): Bus Device Reset
> Message
> > > >Sent
> > > >Jul 16 09:31:20 backup2 /kernel: (sa0:ahc0:0:0:0): no longer in timeout,
> > > >status = 34b
> > > >Jul 16 09:31:20 backup2 /kernel: ahc0: Bus Device Reset on A:0. 1
> SCBs aborted
> > > >Jul 16 09:31:21 backup2 /kernel: (sa0:ahc0:0:0:0): unable to rewind
> after
> > > >test read
> > >
> > > I wonder if the timeouts are now too short for your tape drive? Matt
> > > may have more ideas.
>
>jim
>--
>ET has one helluva sense of humor!
>He's always anal-probing right-wing schizos!
>
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--------------------------------------------------------------------
Mike Tancsa, tel +1 519 651 3400
Network Administration, mike@sentex.net
Sentex Communications www.sentex.net
Cambridge, Ontario Canada www.sentex.net/mike
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