Hallo, George,
Du meintest am 09.05.13:
>> Ah, do you mean btrfs raid? For example:
>>
>> mkfs.btrfs --data raid1 --label FOO /dev/sdd1 /dev/sdd2
>>
>> then the LABEL and UUID is really duplicate.
[...]
> It would be nice if btrfs would just lock all of these partitions out
> and represent them collectively to the broader system as /dev/mntX or
> whatever.
Perhaps you shouldn't use only "blkid" - sometimes I've seen strange
answers (or no answer). I haven't yet found the system behind this
behaviour.
file -s /dev/sdd1
(p.e.) is more reliable.
But for mounting and unmounting I haven't seen any problem:
mount LABEL=FOO /path/to/mountpoint
umount LABEL=FOO
has always worked as expected; for existing devices and mountpoints and
also for nonexisting devices and mountpoints.
By the way: my system doesn't use "udev"; working/addressing with LABEL
works fine also without "udev".
And by another way:
blkid
tells every btrfs disk/partition which is part of the btrfs cluster (in
my installations: all 3 disks) - they have the same UUID but different
UUID_SUBs. No real problem.
Viele Gruesse!
Helmut
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