Abstract: In a method of creating a device unique encryption key, a processor transmits, to an execution-only memory device, a request for creating a unique encryption key for a specific device and an identifier of the specific device; the execution-only memory device executes an execution-only routine stored therein to create a unique encryption key; and the execution-only memory device outputs the created unique encryption key to the processor as the unique encryption key of the specific device, wherein a controller of the execution-only memory device obtains a unique key stored in an internal memory without external access, and processes a key calculation algorithm based on the identifier of the specific device received from the processor and the unique key to create the unique encryption key.

Abstract: An improved disk drive spindle hub assembly for a hard disk drive includes a spindle hub, a stack of information storage disks is journaled about the spindle hub in a spaced-apart, vertically aligned relation, annular spacers are positioned between adjacent ones of the information storage disks in order to space the disks apart in the vertically aligned relation of the spindle hub, a disk clamp configured to concentrically clamp the stack of information storage disks in axial alignment with the spindle hub, and a dummy disk formed an arrangement of a metal plate, a damping portion and a polyester film disposed between the disk clamp and the storage disk in order to absorb spurious vibrations and minimize stress concentrations and disk distortion when the storage disks are mounted for rotation within the hard disk drive.