Re: Confused about UUID mounting and mirrors

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

Michael Tokarev wrote:
> michael@kmaclub.com wrote:
> []
>> Using the filesystem ID doesn't work either because /dev/sda, 
>> /dev/sdb, and /dev/md0 all have the same UUID since it is a mirror.  
>> How do you tell the system to mount /dev/md0 and not the individual 
>> drives which is what it is trying to do now.
> 
> The tools/library that looks up filesystem UUIDs/labels are smarter than
> that.  Or are supposed to be smarter.  That it - the tools are able to
> recognize and skip components of a raid array, since raid superblock is
> present on the device - which is not present on the array itself.


Well, the tools just might be smarter than me.

I tried boot via UUID again tonight using the filesystem UUID and it is 
working.  I haven't messed with the udev rules or changed anything I can 
think of to account for the change in behaviour.  I have also rebooted a 
number of times and it seems to work every time.

Good news it is fixed and I appreciate all the suggestions from 
everyone.  I have learned a lot about linux software raid ( and LVM ) in 
the course of this little project.  Bad news I don't know why it is fixed.

Thanks everyone!

Michael