获取磁盘的WWN
ls -l /dev/disk/by-id/
[…]
lrwxrwxrwx 1 root root 9 Jul 4 22:00 wwn-0x5002e10000000000 -> ../../sr0
lrwxrwxrwx 1 root root 9 Jul 4 22:00 wwn-0x500277a4100c4e21 -> ../../sda
lrwxrwxrwx 1 root root 10 Jul 4 22:00 wwn-0x500277a4100c4e21-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Jul 4 22:00 wwn-0x500277a4100c4e21-part2 -> ../../sda2
lrwxrwxrwx 1 root root 10 Jul 4 22:00 wwn-0x500277a4100c4e21-part3 -> ../../sda3
实例：