On Feb 27, 2014, at 4:09 PM, Lennart Poettering <lenn...@poettering.net> wrote:

> - uuids for btrfs subvols

btrfs subvol show <pathtosubvolume>

It will show the subvol uuid, and if it's a snapshot it will also show the 
parent uuid. If you mean partitiontypeGUID so we have some idea what the 
purpose of these subvolumes is, like the unique partitiontypeGUID for home? 
Could be useful. Certainly there could be some additional metadata for tracking 
the relationship between many subvolumes as well as purpose.

Possibly a snapshot family, that describes multiple subvolumes; and then use 
that information for a systemd mount job, it would make fstab mostly obsolete.

Chris Murphy

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