Subject: Re: sharing disks on the same bus with multiple hosts
To: Rhialto <rhialto@azenomei.knuffel.net>
From: Manuel Bouyer <bouyer@antioche.eu.org>
List: tech-kern
Date: 04/09/2004 23:59:20
On Fri, Apr 09, 2004 at 11:32:54PM +0200, Rhialto wrote:
> On Fri 09 Apr 2004 at 13:56:41 -0700, Jason Thorpe wrote:
> > This requires some complex coordination.  For starters, we would need 
> > to support the SCSI RESERVE/RELEASE (older) and newer persistent 
> > reservation commands.  Then other software (like the file system) has 
> > to be taught how to use them.  That can be Very Hard for fairly simple, 
> > depending on the sharing model you want to employ.
> 
> Can't you simply limit each partition to one host each? Perhaps that was
> not really the question, but as far as I am aware that is the most that
> is currently going to work.

This would probably work.
For some time I shared a DLT library between a NetBSD and a Solaris box
(when migrating backup software). We needed to be carefull about not using
both backup system at the same time, but when we were carefull it worked
fine :)

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--