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Re: udev device naming policy concerns

On Sat, Apr 03, 2004 at 12:00:48AM +0200, Goswin von Brederlow wrote:
> Won't work for cdroms, partition formats without UUID,
> filesystems without label .... but lets ignore those for a moment.

(1)  Removeable medias have their own problem since what's important is
generally not *which* CD-ROM player/drive, but *which* CD-ROM has been
inserted, regardless of which drive the CD-ROM happened to be inserted

(2) ISO 9660 and do have label support.  Mount doesn't support it yet,
but there are patches that convert it to use the blkid library, and it
woudln't be that hard to add label support for CD-ROM's.  This would
actually be far more useful, since we could now mount the CD-ROM in a
different location based on the contents of the CD-ROM, rather than
based on the CD-ROM's SCSI id or position in the SCSI chain, both of
which are equally wrong, although simpler.

(3) Most filesystems have UUID's and/or Labels at this point.  

> If you use this argument you should be in support of using LABEL= or
> UUID= when creating the fstab in the Debian-Installer, right?

Correct, I would be in favor of doing this, since it correctly solves
the problem even if the SCSI id of the device changes.  This will
become even more important if people are using devices that are based
on Firewire or USB, where the SCSI id is even more subject to change,
and therefore just as useless as "/dev/sda".  You really should be
mounting based on filesystem UUID or Label.

					- Ted

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