Re: not all volume types export UUIDs (was: /dev/disk/by-id

[Kay Sievers <kay.sievers@vrfy.org>]

On Thu, 2008-07-03 at 07:30 +0200, martin f krafft wrote:
> also sprach Kay Sievers <kay.sievers@vrfy.org> [2008.07.02.1806 +0200]:
> > All are only unique per namespace/bus, and should better not be
> > mixed.
> 
> Well, but that's my point I suppose. Why do we have to treat the
> same drive differently, whether it's on the ATA bus or the USB bus?
> 
> My reason for bringing this up was that I was trying to boot off
> a harddrive via USB and had to change all the links, rather than
> just watching the system boot off the same disk it has always booted
> from.

So, what id's/symlinks is the same disk showing for ATA and USB in your
case?

Only advanced USB bridges read the number from the actual disk, I have a
bunch of enclosures here, which show all different id's for the same
disk inserted. Also usb-storage needs to encode the target and lun
number in the id, for multi-slot devices, so I do not think that will
work.

Thanks,
Kay