Re: question about fstab in squeeze and uuid
On Sat, 13 Mar 2010 00:26:58 -0500 (EST), Paul E Condon wrote:
>
> A bit worrisome to me. UUID must be persistent during normal life of a
> device, so it can be used as an identifier.
It is important to distinguish between a device and a partition.
/dev/hda is a device. /dev/hda1 is a partition. Partitions
can be created, deleted, moved, resized, reformatted, etc. many
times during the life of its containing device. The UUID of a
partition is assigned when the partition is formatted, either with
mkfs or mkswap. It retains this value until it is formatted again,
at which time a new UUID is calculated. I don't know what the
algorithm is for computing a UUID for a hard disk partition.
Of course, reformatting a partition destroys all data on it; so in
that sense it starts a new life with a new identity.
--
.''`. Stephen Powell <zlinuxman@wowway.com>
: :' :
`. `'`
`-
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