On Mon, Dec 17, 2012 at 04:10:50PM -0800, David Li wrote: > Hi, I wonder if the dm-crypt partition UUID (shown in blkid -p <dev>) can > be used to uniquely associate it with the set of keys the partition will > need. Are there any cases that the UUID would change during the partition's > lifetime? The UUID is actually a filesystem attribute, not a partition attribute. That said, for purpose of an UUID, LUKS is regarded as a filesystem, which is IMO the correct way to view it, but not a perfect one. So, yes, the UUID will change if you do a luksFormat (aptly named if LUKS is regarded as a filesystem), but it will not change otherwise. As a luksFormat invalidates all keys, that should do for your purpose. Arno -- Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@xxxxxxxxxxx GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718 ---- One of the painful things about our time is that those who feel certainty are stupid, and those with any imagination and understanding are filled with doubt and indecision. -- Bertrand Russell _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
