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Re: How to obtain UUID of drives (squeeze udev lacks vol_id)

On 20100321_181749, Ron Johnson wrote:
> On 2010-03-21 17:52, Tom H wrote:
> >>>>*You* should not need to set the UUID.  It should just magically be
> >>>>there.
> >>>>$ /sbin/blkid -t TYPE=swap
> >>>>/dev/sdb1: TYPE="swap" LABEL="swap1" \
> >>>>UUID="c69f59ff-b928-4232-b44c-8da0f12c52db"
> >
> >>>You can cnahe the UUID of any ext partition with
> >
> >>cnahe???
> >
> >It is Sunday and my first weekend off in a few weeks so my fingers are
> >on holiday...
> >
> >
> >>>tune2fs -U <uuid> /dev/...
> >
> >>But you're *not* supposed to *need* to,
> >
> >You do need to do so if you install a second/third/fourth...
> >distribution or version and mkswap changes the UUID of the swap
> I'd want *proof* (i.e., booting into different distros) that
> different mkswap invocations generate different UUIDs.

My reading of man mkswap is that if you don't use the -U option, the
program generates a new, random UUID. Debian will change it's own UUID
if you re-execute mkswap on the same partition, and all other distros
are likely to do the same.

> >partition (although I _think_ that you can use "mkswap -U <uuid>") and
> >you therefore have to boot without swap from your previous install(s).
> >
> Or... use a LABEL.

I don't see a way to apply a label to a swap partition. Where can I
find out about such?

Paul E Condon           

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