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Date: Tue, 15 May 2001 14:36:07 -0700 (PDT)
From: Linus Torvalds <torvalds@transmeta.com>
To: Alex Bligh - linux-kernel <linux-kernel@alex.org.uk>
cc: Jonathan Lundell <jlundell@pobox.com>,
        Jeff Garzik <jgarzik@mandrakesoft.com>,
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        Alan Cox <alan@lxorguk.ukuu.org.uk>,
        Neil Brown <neilb@cse.unsw.edu.au>,
        "H. Peter Anvin" <hpa@transmeta.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        viro@math.psu.edu
Subject: Re: LANANA: To Pending Device Number Registrants
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On Tue, 15 May 2001, Alex Bligh - linux-kernel wrote:
> 
> Q: Let us assume you have dynamic numbering disk0..N as you suggest,
>    and you have some s/w RAID of SCSI disks. A disk fails, and is (hot)
>    removed. Life continues. You reboot the machine. Disks are now numbered
>    disk0..(N-1). If the RAID config specifies using disk0..N thusly,

If you have a raid config like that, then you're screwed _whatever_ you
do.

Look into using UUID's, which fix this properly.

And note, btw, how I think the md autorun stuff do all of this the RIGHT
way. Where RIGHT very much includes not using positional information etc.

		Linus