Identifying a Hard Disk Using hdparm in linux

# hdparm -I /dev/sd?|grep -E "Number|/dev"
/dev/sda:
        Model Number:       HDS722516VLSA80                         
        Serial Number:      VN6D3ECDD7RG1D
/dev/sdb:
        Model Number:       WDC WD740GD-00FLA1                      
        Serial Number:      WD-WMAKE1690676
/dev/sdc:
        Model Number:       HDS722525VLSA80                         
        Serial Number:      VN6J3ECFEALJRD
/dev/sdd:
        Model Number:       HDS722525VLSA80                         
        Serial Number:      VN6J3ECFEBSR1D

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Gurudatta N.R