Mike Fleetwood authored Jun 22, 2015 and Curtis Gedak committed Jul 01, 2015

Run "hdparm -I /dev/DISK" to get the hard drive serial number of
every device which has one and display it in the Device Information.
The displayed value can either be the actual serial number, "none" or
blank.  "none" means the device doesn't have a hard drive serial number,
such as for Linux software RAID arrays, BIOS fake RAID arrays or USB
flash drives.  Blank means something went wrong getting the serial
number.  Either it couldn't be found in the hdparm output or the hdparm
command wasn't installed.

Example real hard drive:
    # hdparm -I /dev/sda
    ...
    ATA device, with non-removable media
            Model Number:       SAMSUNG HM500JI
            Serial Number:      S1WFJDSZ123732
    ...

Example Linux software RAID array:
    # hdparm -I /dev/md127

    /dev/md127:
     HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device

On my desktop with 4 internal hard drives 2 Linux software RAID arrays
on those hard drives, 2 USB flash drives and 1 USB hard drive attached,
running hdparm 9 times added 0.07 seconds to the device refresh time.

Bug 751251 - Show serial number in device information