I have two external USB drives of the same make and model, and one of them is driving me slightly nuts by never being assigned a UUID (or, at least, it doesn't show up in
/dev/disk/by-uuid). What could cause that, and how can I fix it?
FWIW, ext2fs on Windows was never able to assign a drive letter to that disk automatically, and always complains that "GUID is 0" when I assign a drive letter to it manually (but after that it works fine).
The device block information seems to pinpoint the problem (thanks @dchirikov): Both partitions have the same UUID. How can I fix this?
$ sudo blkid /dev/sd[ab]* /dev/sda: PTUUID="0002866e" PTTYPE="dos" /dev/sda1: LABEL="Elements1" UUID="DACC0069CC0041ED" TYPE="ntfs" /dev/sdb: PTUUID="83529362" PTTYPE="dos" /dev/sdb1: LABEL="Elements2" UUID="DACC0069CC0041ED" TYPE="ntfs"