Translations:Removable media/5/en
From Gentoo Wiki
In many cases storage devices are identified by their device file, e.g. /dev/sd*. Alternatively their UUID (Universally Unique Identifier) (/dev/disk/by-uuid/*) or label (/dev/disk/by-label/*) can be used. In comparison to device files UUIDs and labels are persistent and will never change because of asynchronous detection. The UUID is generated automatically during filesystem creation. The label can be specified at filesystem creation or changed afterwards.