Yeah that's a good point...at some point a disk controller id could have
it's exact number re-assigned...however I like my odds ;-)

> On Fri, 20 Nov 2009 12:12:37 -0800 (PST)
> [email protected] wrote:
>
>> The serial and model number of the hard disk controller chip can also
>> work
>> for unique ID if you need it.  It's guaranteed to be unique under
>> SATA/ATA
>> spec (or it doesn't comply with the standard).
>
> Guess what - they are not always unique. Almost but not quite. In many
> ways it doesn't matter. A 128 bit random number UUID generated when you
> install the software on the Linux end is going to be statistically
> adequate for the foreseeable lifetime of the planet and likewise the odds
> of hitting a pair of identically numbered devices is remote.
>
> Alan
>

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