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Date:      Sun, 12 Apr 1998 23:20:06 -0400 (EDT)
From:      Mike Jeays <jeays@statcan.ca>
To:        Satoh Junichi <junichi@astec.co.jp>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: ATAPI Zip drive
Message-ID:  <Pine.SOL.3.96.980412231711.26679A-100000@austral>
In-Reply-To: <199804130248.LAA01315@kamui.astec.co.jp>

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On Mon, 13 Apr 1998, Satoh Junichi wrote:

> > > When I attempt to mount either the CD-ROM or the ZIP drive, mount
> > > hangs, and I have to interrupt it with ctrl-C.  If I do this
> > > a second time, the system crashes.  (X stops.  Attempts to
> > > log on through another tty don't work - characters entered after
> > > the login prompt just get echoed to the screen.  It is big red
> > > switch time!)
> > 
> > Hmm...  I don't know why.
> 
> I tested some combination of ATAPI devices, CD-ROM, ZIP and LS-120, on
> an IDE channel. I found the kernel is down by combination of the 'accel'
> and the 'intr' devices. For example, MATSUSHITA x24 CD-ROM drive and
> IOMEGA ZIP drive:
> ===========================================================================
> wdc1: unit 0 (atapi): <MATSHITA CR-587/7S13>, removable, accel, dma, iordis
>                                                          ^^^^^
> wdc1: unit 1 (atapi): <IOMEGA  ZIP 100       ATAPI/23.D>, removable, intr, 
>                                                                      ^^^^
> ===========================================================================
> 
> Now, when one device supports the 'intr', the atapi driver also supports
> it. It's not correct. The driver should *NOT* support it when the other
> device doesn't support it.
> 
> I made a patch against the 2.2.6R atapi driver. After apply it, any
> combinations are acceptable.
> ---
> Junichi
> 

That's interesting; I think my two devices are 'accel' and 'intr'
respectively.  (The CD-ROM isn't plugged in right now, so I can't see
for certain.)  I will try the patch tomorrow, and report back.

Thanks for the help!




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