[4904] in linux-scsi channel archive
Re: dual-attached disk
daemon@ATHENA.MIT.EDU (Andy Poling)
Thu Oct 15 14:30:27 1998
Date: Thu, 15 Oct 1998 00:09:12 -0400 (EDT)
From: Andy Poling <andy@globalauctions.com>
To: Robert Dobozy <robo@idata.sk>
cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <Pine.OSF.4.00.9810141628400.11321-100000@axp.idata.sk>
On Wed, 14 Oct 1998, Robert Dobozy wrote:
> > this. I don't have a lot of experience with using dual-hosted disks -
> > the SCSI specification does allow for "reservations" so that one host can
> > block others from using a device for some period of time, but I have no
> > idea whether this is usable in practice.
>
> 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...
-Andy
Global Auctions
http://www.globalauctions.com
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