Find a filesystem by label or UUID.
The findfs command locates a filesystem device based on its volume label or UUID. The findfs command searches all disks in the system to find a match. If a match is found, the device name is printed to standard output. The findfs command is part of the e2fsprogs project.
findfs (parameter)
LABEL=<label> or UUID=<uuid>: Query the filesystem by its volume label or UUID.
Find the device corresponding to a volume label:
findfs LABEL=/boot
/dev/hda1