Re: where did my ata drives go?

From: Florian Kulzer <florian.kulzer+debian@xxxxxxx>
Date: Sat, 11 Sep 2010 17:21:44 +0200

On Fri, Sep 10, 2010 at 13:13:50 -0400, Stephen Powell wrote:

On Fri, 10 Sep 2010 12:47:33 -0400 (EDT), Rick Pasotto wrote:

On Fri, Sep 10, 2010 at 12:18:07PM -0400, Stephen Powell wrote:

What happens if, after the system has booted,
you issue a manual mount command as root, using the new device
name?

mount -t ext3 /dev/sdc1 /hd0

That works perfectly.

[...]

then try

umount /hd0
mount -t ext3 UUID=03c23684-dea8-458d-b04b-0ae8a056cb0d /hd0

mount: special device UUID=03c23684-dea8-458d-b04b-0ae8a056cb0d does not exist

then try

umount /hd0
mount -t ext3 LABEL=hdb1 /hd0

mount: special device LABEL=hdb1 does not exist

[...]

OK, this looks like a udev problem of some sort. The udev aliases
are not being created. I'm not sure why yet.

My guess would be that blkid does not read the UUID and label of the
partition correctly. AFAIK, udev relies on blkid to obtain the
information that is necessary to populate the /dev/disk/by-label/ and
/dev/disk/by-uuid/ directories. Here is an example of how it should
work:

$ /sbin/blkid /dev/sda5
/dev/sda5: LABEL="root" UUID="d0100d2c-69e9-4a37-bf17-9af5ff151032" TYPE="ext3"

Rick, if "/sbin/blkid /dev/sdc1" fails report anything on your system
then show us the output of:

BLKID_DEBUG=0xffff /sbin/blkid /dev/sdc1

--
Regards, |
Florian |

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Follow-Ups:
- Re: where did my ata drives go?
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References:
- Re: where did my ata drives go?
  - From: Rick Pasotto
- Re: where did my ata drives go?
  - From: Stephen Powell

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