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Date:	Sun, 05 Nov 2006 15:06:39 +0100
From:	Arjan van de Ven <arjan@...radead.org>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
Cc:	andrew@...rond.org, linux-kernel@...r.kernel.org
Subject: Re: Scsi cdrom naming confusion; sr or scd?

On Sun, 2006-11-05 at 12:33 +0100, Jan Engelhardt wrote:
> > "The prefix /dev/sr (instead of /dev/scd) has been deprecated"
> >
> >but booting 2.6.18.2 from a scsi CD only works if I pass the kernel
> >parameter root=/dev/sr0 and fails with root=/dev/scd0
> >
> >I guess the kernel ought to be taught about the scd* names aswell?
> 
> brw-r-----  1 root disk 11, 0 Mar 19  2005 /dev/scd0
> brw-r-----  1 root disk 11, 0 Mar 19  2005 /dev/sr0
> 
> Plus I see sr0 being far more commonly used than scd0.
> So I guess the doc is wrong.


and this is why it's wrong to make naming policy a kernel thing!
Userspace is the right place to do this (and there I suspect the name
will end up being /dev/cdrom)...... the kernel really shouldn't care at
all what the name is.
(I know for root= it currently has to if you don't have an initrd but..
well... that's sort of a nasty interface anyway; what if you have a usb
cdrom drive connected for example.. suddenly all your names changed)

-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com
Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org

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