Re: devfs

Alan Cox (alan@lxorguk.ukuu.org.uk)
Sat, 8 Aug 1998 12:32:20 +0100 (BST)


> The actual fs has a UUID, as opposed to the partition in which it resides?
> If we take a partition table approach, then we aren't being biased towards
> ext2....

Not all file systems have "partitions" and there isnt a place for partitions
to hide UUID's easily. We can pull whatever serial is available for the fs
- you've just noted NTfs has a serial number

> One more question: How universally unique are the UUID's? If I copy the
> image of a fs from one system to another, what are the chances of a
> "clash?"

UUID is an internet rfc for statistically improbable name clashes. It tries
to factor in ethernet mac addresses, time, ip addresses and other uniqueness
enhancing values onto random numbers.

Alan

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