On 15.06.2015 18:13, John Hodrien wrote: > On Mon, 15 Jun 2015, jd1008 wrote: > >> Thanx for the update >> but what about non-gpt and non lvm partitions? >> What is used as inp >> nut to create a universally unique id? >> >> (Actually, for an id to be universally unique, one would almost >> nee knowledge of all existing id's. >> So, I do not have much credence in this universal uniqueness. > > Sufficiently random gets you there, since you're not connecting billions of > filesystems to a single system. If you really want to generate them by > hand, > feel free, as mkfs.ext4 lets you specify the filesystem UUID. Or if you are in the situation of the original poster and made a copy using dd use tune2fs -L and -U to modify label and uuid of the copy. Regards, Dennis