[8529] in linux-scsi channel archive
Re: SCSI write errors with Onstream ADR50 drive
daemon@ATHENA.MIT.EDU (Ricky Beam)
Tue Apr 4 01:26:00 2000
Date: Tue, 4 Apr 2000 01:24:10 -0400 (EDT)
From: Ricky Beam <jfbeam@bluetopia.net>
To: Eric Lee Green <eric@estinc.com>
Cc: "Karl B. Hammar" <karl@kalle.csb.ki.se>, tom@cognality.com,
linux-scsi@vger.rutgers.edu
In-Reply-To: <38E913B8.6711029A@estinc.com>
Message-ID: <Pine.LNX.4.04.10004040117530.23096-100000@beaker>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
On Mon, 3 Apr 2000, Eric Lee Green wrote:
>He (Tom) says that he checked termination. However, that is not easy to check.
*grin* "The light's green!" Seriously, if it's LVD then I assume it's a
quality external terminator -- they are usually clamped to the end of the
cable.
>I would first suggest making sure that a) you have active termination, and b)
>you don't have passive termination enabled in one of the internal drives. This
Again, if it's LVD, then none of the drives will have terminators.
>sounds an aweful lot like a termination problem -- often an improperly
Or a cable problem or even a power supply problem! If you are running in
LVD mode, use a cable designed for it. Regular flat ribbon cable will
not carry a full speed (40MHz) LVD signal without distortion. That's
like running 100base-TX over phone wire.
Can you try dropping the bus to SE and/or reducing the speed of the tape
drive. (i.e. run the drive in async mode just to make sure it isn't the
drive.)
--Ricky
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