# for i in /dev/sd? ; do echo $i ; hdparm -I $i | grep 'Serial Number' ; done /dev/sda Serial Number: S1D52--- /dev/sdb Serial Number: S1D5E--- /dev/sdc HDIO_DRIVE_CMD(identify) failed: Input/output error /dev/sdd Serial Number: S1D57--- /dev/sde Serial Number: S1D5E---