Re: Confused about UUID mounting and mirrors

["michael@kmaclub.com" <michael@kmaclub.com>]

David Greaves wrote:
> michael@kmaclub.com wrote:
>> UUID=8e651838-38c1-4783-8bde-4174ec484d52 /     ext3    defaults  1 1
>> UUID=aaeca70c-f0fe-470c-b631-87248648d275 /export xfs defaults,nobarrier
>> 1 2
>> UUID=6e22c5b0-2874-4826-a871-ed733f8da643 swap swap    defaults   0 0
>> UUID=323cd094-4cbe-4c3b-9096-366c05465e7c /export/services xfs defaults 1 2
>>
>> so it is referring to the UUID of the filesystem and not necessarily the
>> device.  Some are single partitions, some md devices, and some sit on
>> top of LVM.
> 
> What does :
>   mdadm --detail /dev/md0 | grep UUID
> show?
> 
> I think it will give you the UUID of the md device, not the fs on the md device
> (which as you have seen is also the UUID of the fs visible on the md components)


That does return a UUID, but it is a slightly different format

mdadm --detail /dev/md0 | grep UUID
            UUID : 3531a48d:1180bdf3:bfcd9e76:5b7e5957

versus something like:

6e22c5b0-2874-4826-a871-ed733f8da643

I tried adding it to /etc/fstab as well as just using mount -U <uuid> 
and both fail complaining that:

mount -U 3531a48d:1180bdf3:bfcd9e76:5b7e5957 /mnt
mount: no such partition found

I tried replacing the : with - to match the format in /etc/fstab with no 
success.

mount -U 3531a48d-1180bdf3-bfcd9e76-5b7e5957 /mnt
mount: no such partition found


I also tried formatting it the same in terms of the - location

mount -U  3531a48d-1180-bdf3-bfcd-9e765b7e5957 /mnt
mount: no such partition found


Is anyone mounting a mirrored /boot using UUID's?

Michael