/dev/disk/:
total 0
drwxr-xr-x 2 root root 80 Jan 15 10:06 by-id
drwxr-xr-x 2 root root 80 Jan 15 10:11 by-label
drwxr-xr-x 2 root root 80 Jan 15 10:11 by-uuid

/dev/disk/by-id:
total 0
lrwxrwxrwx 1 root root 9 Jan 15 10:11 ata-QEMU_DVD-ROM_QM00003 -> ../../sr0
lrwxrwxrwx 1 root root 9 Jan 15 10:11 ata-QEMU_HARDDISK_QM00001 -> ../../sda

/dev/disk/by-label:
total 0
lrwxrwxrwx 1 root root 9 Jan 15 10:11 ALT\x20Linux\x20live-builder\x2fx86_64 -> ../../sr0
lrwxrwxrwx 1 root root 9 Jan 15 10:11 alt-live-storage -> ../../sda

/dev/disk/by-uuid:
total 0
lrwxrwxrwx 1 root root 9 Jan 15 10:11 2015-01-14-11-45-39-00 -> ../../sr0
lrwxrwxrwx 1 root root 9 Jan 15 10:11 3cf60354-842a-41f4-997f-6002c1f07e2c -> ../../sda