>>> 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. > > Would that mean that there has to be a table stored somewhere which > provides this kind of mapping? In that case, as this table is required > at the boot time, even before the bootable harddisk is detected which > could have stored such a table persitently, is this table written > somewhere in the initramfs? I think UDEV manages persistent naming of devices for you. The mappings that you talk of are managed as udev rules. Reading more on udev might give you a better idea. I don't know the exact details so I'll point you to link I've planning to read for some time! :) http://reactivated.net/writing_udev_rules.html CMIIW. Regards, -mandeep > >> >>> -- >>> John >>> >> > > - > Shreyansh > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
