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Date:      Fri, 9 Jan 1998 17:47:22 +1030
From:      Greg Lehey <grog@lemis.com>
To:        Steven Ames <steve@news.cioe.com>
Cc:        wilko@yedi.iaf.nl, freebsd-questions@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG
Subject:   Re: SCSI/Tape problem?
Message-ID:  <19980109174722.63760@lemis.com>
In-Reply-To: <199801090157.UAA00259@news.cioe.com>; from Steven Ames on Thu, Jan 08, 1998 at 08:57:03PM -0500
References:  <199801090157.UAA00259@news.cioe.com>

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On Thu, Jan 08, 1998 at 08:57:03PM -0500, Steven Ames wrote:
>>> I'm encountering a problem that I just can't seem to solve.
>>> I have a FreeBSD system that I've been using to backup my
>>> network for quite a while. It is using an Adaptec 2940 card
>>> and an Exabyte 8205 tape backup. I'm using 'amanda' to do
>>> the backups onto 160M tapes. Alrighty...
>>>
>>> A while back the system started to lock up during the backup
>>> process. Also the command 'mt erase' would never terminate.
>>
>> You might run into some timeout situation. I have an (admittedly
>> somewhat older) 8200 drive and it takes ages to do an erase.
>>
>> Why not omit the 'mt erase' altogether? The drive will erase your
>> tape anyhow when you start writing to it from BOT.
>
> Hrm... I was unclear. The 'mt erase' is obviously only a
> symptom. The backup process still causes my machine to lockup...

FWIW, I have an 8505XL on a 2940UW (also an Archive DDS changer).  I
don't have any trouble with them.  Admittedly, I'm a diehard tar user,
but I can't imagine that's the problem.

Are you 100% sure your termination is OK?  I've found the 2940 to be
very particular.  For example, I *could not* get it to work with
specific combinations of disks, though I'm sure that there is nothing
wrong with the disks.  I now have two 2940s in my machine, with some
disks on each, and it works fine like that.

Greg



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