[4880] in linux-scsi channel archive
Re: dual-attached disk
daemon@ATHENA.MIT.EDU (Barry Treahy)
Wed Oct 14 04:26:32 1998
Date: Tue, 13 Oct 1998 15:59:46 -0700
From: Barry Treahy <treahy@mmaz.com>
To: "George E. Lass" <George.Lass@osc.com>
CC: thoth@purplefrog.com, linux-scsi@vger.rutgers.edu
Ditto. If Linux or the 2940's can't deal with this, does anyone know of any GNU
software that will mirror paritions between systems to keep a backup system hot and
current?
Barry
George E. Lass wrote:
> thoth@purplefrog.com wrote:
> >
> > Does Linux support dual-attached SCSI drives? We have an application where
> > we'd like to take some disk and use it from one machine, and if that machine
> > fails, mount the disks on the other, and resume serving data. In the Sun
> > world, you just run a SCSI chain out of one machine and into another. Can
> > Linux do this?
> >
> > --
> > Bob Forsman thoth@gainesville.fl.us
> > http://www.gainesville.fl.us/~thoth/
> >
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> > the body of a message to majordomo@vger.rutgers.edu
>
> I've tried this with the 2.0.30 kernel (RedHat 4.2) and the AHA-2940U
> host
> adapters and it doesn't work very well.
>
> It seems like if the system that does *not* have the drive mounted is
> reset, it will get into some sort of "reset war" on the SCSI bus with
> the other system. This happend before control is ever passed to the
> boot loader. (must be something in the AHA-2940 BIOS).
>
> But don't let that stop you! If you do manage to get it to work please
> let me know your configuration.
>
> George Lass
>
> george.lass@osc.com
>
> P.S. For now I'm doing dual writes from my applications to my backup
> server via NFS over a dedicated 100mb ethernet link
>
> G
> --
> ... Unix IS a user friendly O/S ...
> (It's just picky about its friends)
>
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