UUIDs on drives

[Derek Broughton]

Rashkae wrote:

> Derek Broughton wrote:
>> Smoot Carl-Mitchell wrote:
>> 
>>> On Thu, 2008-08-14 at 12:27 -0300, Derek Broughton wrote:
>>>
>>>> When you find some duplication, _then_ object.  I don't believe you're
>>>> ever
>>>> going to find any, even with a 4-byte vfat UUID.   2**128 is still a
>>>> very big number.
>>> A quick clarification here.  With a 4 byte number, there is a 1 in 2**32
>>> (about 1 in 4 billion) chance of duplicating a UUID.  It is not 1 chance
>>> in 2**128 which is for a 128 bit number.
>> 
>> oops. :-)
>> 
>> 2**32 is _still_ a very big number.  There are almost certainly not 4
>> billion vfat filesystems in the world today.
> 
> Every pre 2000 computer, every digital camera, every flash memory card.
>  Probably most any embeded device that needs some quick and dirty
> filesystem. There might not be 4 billion, but duplicate ID's are almost
> a certainty.

Yeah, but I'm prepared to bet Brian never finds one (that he hasn't manually
written) :-)
-- 
derek