[4915] in linux-scsi channel archive
Re: dual-attached disk
daemon@ATHENA.MIT.EDU (Matthew Jacob)
Fri Oct 16 09:53:10 1998
Date: Thu, 15 Oct 1998 15:59:23 -0700 (PDT)
From: Matthew Jacob <mjacob@feral.com>
Reply-To: mjacob@feral.com
To: Robert Dobozy <robo@idata.sk>
cc: Andy Poling <andy@globalauctions.com>, linux-scsi@vger.rutgers.edu
In-Reply-To: <Pine.OSF.4.00.9810151215450.17089-100000@axp.idata.sk>
You can also try 3rd party reservations.
On Thu, 15 Oct 1998, Robert Dobozy wrote:
>
> On Thu, 15 Oct 1998, Andy Poling wrote:
>
> > > Yes it can be. If you want to share disk, but not in parallel. One machine
> > > can reserve this disk and use it. Other machine will get reservation
> > > conflict when accessing this device. When first machine is finished, it
> > > must unreserve device.
> >
> > That could be a problem when the machine with the reservation is
> > down/crashed...
>
> No, you have to have some process which will detect other machine
> down/crash and than make BUS DEVICE RESET, which will release all
> reservations. What on of reasons, why scsi reset from time to time may
> appear. You have to ensure, that this process (call him bus arbiter - I'm
> not sure if it's correct in english) will run only one machine ....
>
>
> Robert
>
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