Re: [patch] search for partition using GPT GUID

[Isaac Dupree <ml@isaac.cedarswampstudios.org>]

On 03/11/10 09:43, KESHAV P.R. wrote:
> GPT GUID is one of the best FILESYSTEM-INDEPENDENT way of uniquely
> identifying a partition.

I am not sure if Linux supports gpt-uuids (I didn't find any hints of it 
via google!), but this sounds like it could be great news for Linux 
encrypted swap -- the current enc-swap recommendations destroy the 
partition contents on every boot, with a new random encryption-key and 
new `mkswap` inside it, so you have to refer to it like /dev/sda5.  And 
then "/dev/sda5" partition gets destroyed on every boot, so the failure 
mode for wrong-partition is even worse than normal.  But with a UUID 
stored outside the partition, it would be more possible to uniquely 
identify that partition.  (Or a different encrypted-swap format, but no 
one seems interested in doing that :-( )

> Maybe even the GPT Disk GUID can be used to reference a
> GPT disk (instead of confusion over whether it is (hd1) or (hd2) and
> so on.

oh, interesting, that could perhaps be nice for something

-Isaac