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Date:      Sat, 1 Apr 2000 00:01:36 +0400 (MSD)
From:      vova@express.ru
To:        Bernd Walter <ticso@cicely.de>
Cc:        freebsd-fs@FreeBSD.ORG
Subject:   Re: SCSI bus
Message-ID:  <Pine.BSF.4.21.0003312359580.14919-100000@lanturn.kmost.express.ru>
In-Reply-To: <20000331215756.A19890@cicely8.cicely.de>

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On Fri, 31 Mar 2000, Bernd Walter wrote:

> >  I have question about two SCSI controllers on one SCSI bus,
> > 
> > I want to run following configuration: one FreeBSD with SCSI controler,
> > with mounted disks in read/write mode, and another FreeBSD with SCSI
> > controller on the same bus with mounted disks in read-only mode.
> > 
> > So can two controllers correctly handle SCSI bus with FreeBSD drivers ?
> > (I mean aic78* controllers)
> 
> I don't expect this to work because the readonly side can't know when the
> incore informations outdates.

Yes, it can be a problem, but may be this may be solved by disabling any
cache on read-only side (or setting expire time in one sec) ?

> The two controller side shouldn't be the problem - but I can't say for shure
> as I don't know the CAM system much and havn't tried.

> -- 
> B.Walter                  COSMO-Project              http://www.cosmo-project.de
> ticso@cicely.de             Usergroup                info@cosmo-project.de 

--
TSB Russian Express, Moscow
Vladimir B. Grebenschikov, vova@express.ru



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