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Date:      Fri, 1 Feb 2002 22:11:41 +0100
From:      Wilko Bulte <wkb@freebie.xs4all.nl>
To:        Doug White <dwhite@resnet.uoregon.edu>
Cc:        Jesper Skriver <jesper@FreeBSD.ORG>, stable@FreeBSD.ORG
Subject:   Re: mount the same filesystem read-only on multiple boxes, and read-write on one ?
Message-ID:  <20020201221141.B9318@freebie.xs4all.nl>
In-Reply-To: <20020201122950.C9956-100000@resnet.uoregon.edu>; from dwhite@resnet.uoregon.edu on Fri, Feb 01, 2002 at 12:30:35PM -0800
References:  <20020201195701.F21826@FreeBSD.org> <20020201122950.C9956-100000@resnet.uoregon.edu>

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On Fri, Feb 01, 2002 at 12:30:35PM -0800, Doug White wrote:
> On Fri, 1 Feb 2002, Jesper Skriver wrote:
> 
> > I was wondering if it would be possible to mount the same filesystem
> > (over fiberchannel) read-only on multiple boxes, while at the same time
> > it would be mounted read-write on a single box which write updates to
> > the files.
> 
> I think some work would be needed to disable caching for the RO
> filesystem.  It couldn't cache anything since it could change out from
> under it ...
> 
> Also, most SANs don't let you export a volume to multiple systems.

That is not an attribute of the SAN but of the array controller.

I can 'export' a LUN on our CPQ HSG80 controllers to lots of servers
at the same time. Need to be able to do that for example for Tru64
Truclusters.

W/

-- 
|   / o / /_  _   		email: 	wilko@FreeBSD.org
|/|/ / / /(  (_)  Bulte		Arnhem, the Netherlands

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