On Tue, Dec 21, 2010 at 8:43 PM, John Mahoney <jmahoney@xxxxxxxx> wrote: >>> b. Also, who generates these UUID - is it a disk property (like, ROM >>> signature or stuff?), or this is some udev magic? >>> >> >> IMHO, this is fixed for every device during manufacturing. >> > > I believe the UUID is created per partition/file system and are > created when creating the file system for a partition. If anyone even > had their drive changed from /dev/hda to /dev/sda due to linux > changing how they labeled ide drives they will know why people use > UUID instead of the device name . Also, it is not guaranteed that > they drives will always come up in the same order between kernel > releases(This is my personal opinion). > I think you are correct, it is assigned when a file system is created. It is a tunable parameter which can be chnaged using tune2fs -U command. A new UUID can be generated using command uuidgen. > -- > John > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
