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Date:      Sat, 2 Oct 1999 22:11:52 +0200
From:      Bernd Walter <ticso@cicely.de>
To:        Narvi <narvi@haldjas.folklore.ee>
Cc:        jin@george.lbl.gov, bmah@CA.Sandia.GOV, hackers@FreeBSD.ORG
Subject:   Re: SCSI disk naming problem
Message-ID:  <19991002221151.B92132@cicely8.cicely.de>
In-Reply-To: <Pine.BSF.3.96.991002131418.86170B-100000@haldjas.folklore.ee>; from Narvi on Sat, Oct 02, 1999 at 01:15:53PM %2B0300
References:  <199910011833.LAA20871@george.lbl.gov> <Pine.BSF.3.96.991002131418.86170B-100000@haldjas.folklore.ee>

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On Sat, Oct 02, 1999 at 01:15:53PM +0300, Narvi wrote:
> 
> On Fri, 1 Oct 1999 jin@george.lbl.gov wrote:
> 
> > bmah@CA.Sandia.GOV wrote:
> 
> [snip]
> 
> > > 
> > > That's an interesting argument on the part of a few people.  The
> > > commercial UNIX I first adminned had wired down, short names for disks
> > > (rz0, rz1, rz2, ... ).  This was very nice.
> > 
> > This one does not resolve the controller problem either as
> > narvi@haldjas.folklore.ee said.
> > 
> > So, I guess dac0t0, dac0t1, ...  dac3t4, will be good enough if we want
> > to be short, but anything shorter than this will be meaningless.
> > 
> 
> As long as you don't move a hard disk from one bus on the controller to
> the other 8-)

Yes something like dac0t0... is realy nice - but AFAIK it's not general enough
for fibre channel.

The main point is that I only see this problem with removeable disks and
other kind of SCSI-devices, which I usually wire down.
Most of my fixed disks are running with vinum.
vinum is able to handle if a drive has changed it's ID and/or name.
It's an important thing to have something like this if you want to be able
to hotplug a drive (or power up later). Sometimes it's getting another name
than it would have after reboot!

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



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