UUIDs on drives

[Verde Denim]

On Fri, Aug 15, 2008 at 6:03 PM, Karl Larsen <k5di at zianet.com> wrote:

> ghe wrote:
> > Rashkae wrote:
> >
> >
> >> The boot drive is always Drive 0, whichever drive on your Mobo you
> >> decide to boot from.  I strongly suggest you always make the drive where
> >> your /boot/grub is located the boot drive.  Anything else will now
> >> likely lead to tears.
> >>
> >
> > (This is long, but hopefully the end.)
> >
> > Look. I think we're all saying pretty much the same thing, but, as
> > someone has said, we're looking at the situation from different points
> > of view and different layers of software/firmware.
> > UUIDs are yet another layer of software designed to maintain
> > consistency, but they refer only to filesystems, not hardware devices.
> >
>        Snip
>
>
>    Actually the UUID defines a partition or swap partition.
> > So some things are still at the mercy of the (sometimes not very
> > merciful and often easily bewildered) ROM code.
> >
> > The idea of running all block I/O through one piece of code is a great
> > idea, but the operations have to be split out for the protocols of the
> > different controllers, so there's not much to gain, I claim, by labeling
> > all block devices with the same code.
> >       Snip
> >
>    Just so you know, it is easy to to get the UUID for a partition. It
> looks like:
>
> sudo vol_id /dev/hda2 and it will print out this:
>
> karl at karl-desktop:~$ sudo vol_id /dev/hda2
> [sudo] password for karl:
> ID_FS_USAGE=other
> ID_FS_TYPE=swap
> ID_FS_VERSION=2
> ID_FS_UUID=4d7c4159-d00c-4069-bfb6-f9a6e153c723
> ID_FS_UUID_ENC=4d7c4159-d00c-4069-bfb6-f9a6e153c723
> ID_FS_LABEL=
> ID_FS_LABEL_ENC=
> ID_FS_LABEL_SAFE=
> karl at karl-desktop:~$
>
>    For some reason it prints out the word twice.
>
> But this you can do for any defined partition and it works.
>
> Karl


Karl
If you're referring to
ID_FS_UUID=4d7c4159-d00c-4069-bfb6-f9a6e153c723
ID_FS_UUID_ENC=4d7c4159-d00c-4069-bfb6-f9a6e153c723

As printing twice, it isn't. The first is the UUID for the filesystem, the
second item (I believe) refers to an encrypted file system. I think they're
the same because there isn't an encrypted file system here.

Jack


>
> --
>
>        Karl F. Larsen, AKA K5DI
>        Linux User
>        #450462   http://counter.li.org.
>   PGP 4208 4D6E 595F 22B9 FF1C  ECB6 4A3C 2C54 FE23 53A7
>
>
> --
> ubuntu-users mailing list
> ubuntu-users at lists.ubuntu.com
> Modify settings or unsubscribe at:
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-users/attachments/20080815/31fa9c85/attachment.html>