Re: UUID - autmatically entries?
On 20110521_113317, Paul E Condon wrote:
> On 20110521_184436, Hans-J. Ullrich wrote:
> > Hi all,
> >
> > during an update all devices were changed from /dev/sdX to its UUID.
> >
> > This included /etc/fstab and /etc/crypttab. Does somebody know, which package
> > did the changes? As I had to reinstall and used my old configurations (backup),
> > my UUIDs are now wrong. Of course, I can edit all files manually, but if a
> > script or a package does that automaticaly, it would be easier and avoid
> > errors (i.e. typos).
> >
> > Just another question: Can UUIDs be changed or must they stay forever? (I saw
>
> Yes, they can be changed. Use the -U option in either mkfs.ext3 to set
> a particular UUID while making the fs, or in tune2fs to overwrite an
> existing UUID with one that is more to your liking. If you maintain a
> small database of UUID values for your disks, you might be able to
> automate. Or look into establishing for yourself a policy of using
> LABEL on all your disk partitions.
>
> The install program seems to automatically rewrite UUIDs if you ask it
> to erase a partition. IMHO, the method for handling disk naming is
> still a work in progress. In the meantime, my particular kluge
> involves using labels. They are shorter to type and easier to remember.
>
> My understanding is that a UUID is just a string of hex characters of
> the defined length and with embedded hyphens at the defined internal
> locations. Generate a half a dozen and they are almost certainly all
> different, even if you are using a very bad random number generator.
> That they are all different is what makes them useful. The problem is
> highly over intellectualized.
>
Also, dumpe2fs allows you to verify that you have done your work to
your liking. ;0
--
Paul E Condon
pecondon@mesanetworks.net
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