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From: Don Lewis <Don.Lewis@tsc.tdk.com>
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Date: Mon, 18 Aug 1997 22:00:40 -0700
In-Reply-To: "Justin T. Gibbs" <gibbs@plutotech.com>
       "Re: Bus resets. Grrrr." (Aug 18,  9:59pm)
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To: "Justin T. Gibbs" <gibbs@plutotech.com>, Greg Lehey <grog@lemis.com>
Subject: Re: Bus resets. Grrrr.
Cc: freebsd-scsi@FreeBSD.ORG (FreeBSD SCSI Mailing List)
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On Aug 18,  9:59pm, "Justin T. Gibbs" wrote:
} Subject: Re: Bus resets. Grrrr.
} 
} So, what does a "timeout while idle" tell us?  Well, it means that either
} the timeout that the type driver (in this case the "st" driver) specified
} was too short
  [ deleted ]
} The
} first problem seems really common in the st driver especially when older
} media or a rewind operation is involved.  You can try bumping up the
} timeouts in sys/scsi/st.c to see if this solves your problem.

I had to increase the read/write timeout to 10 minutes from the default 2
minutes for a HP C1553 DAT using 90m tapes connected to a SunOS box.  If
the drive sees too many errors, it does a "head scrub" to try to dislodge
any dirt from the head.  This takes a really long time ...

			---  Truck