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4.5GB DISKs
  

    VPD typical example:

  pdisk0            20-58-P           4GB SSA F Physical Disk Drive

                Manufacturer................IBMSSA
                Machine Type and Model......DFHCC4C
                Part Number.................27H1698
                ROS Level and ID............9190
                Serial Number...............6816957D
                EC Level....................488651
                Device Specific.(Z2)........RAMSC091
                Device Specific.(Z3)........99F7898
                Device Specific.(Z4)........97245