Ubuntu

Comment 12 for bug 93655

We handled the transition during an earlier upgrade cycle, and have always written UUID= form since then. If you don't have UUIDs in your fstab, it's likely that you removed them yourself. We preserve this for you, since it's your choice.

Gutsy's volumeid (113-0ubuntu15) package contains the migration script separately, you can run /usr/lib/udev/migrate-fstab-to-uuid.sh at any time.