31
William R Akin Jr, Arun Balakrishnan, Stephen P Williams, Christopher M Carpenter: Suspension with biaxially shielded conductor trace array. Quantum Corporation, David B Harrison, Debra A Chun, August 18, 1998: US05796552 (76 worldwide citation)

A head suspension has an integrated multi-layer trace conductor array for supporting and electrically interconnecting a read/write head to electronic circuitry in a disk drive. The trace conductor array includes an integrally formed electrical shield which may be grounded or ungrounded and formed to ...


32
Thomas Bolt: Media library with failover capability. Quantum Corporation, Michael Zarrabian, April 20, 2004: US06725394 (76 worldwide citation)

A process/method for controlling a digital data storage unit including a multiplicity of storage media slots for receiving media storage units, a plurality of media storage units loaded in some of the storage media slots, a plurality of data storage drives each having a unique drive address, a loade ...


33
Parminder Gill, Clifford M Gold, James A Henson: Time allocation shared memory arbitration for disk drive controller. Quantum Corporation, Michael Zarrubian, January 23, 2001: US06178486 (75 worldwide citation)

A method and apparatus for arbitrating requests for access to a single buffer memory embedded within a disk drive in which a disk data channel is assigned a highest priority for buffer access within a queue. An arbitration cycle progressively services access requests pending within the queue, beginn ...


34
William G Moon, Ronald R Moon, Bruce R Peterson, Donald C Westwood: Rotating rigid disk data storage device. Quantum Corporation, David B Harrison, May 7, 1985: US04516177 (75 worldwide citation)

An improved rotating disk data storage device is achieved in a combination of an optical encoder to detect data track crossings, a servo sector surface on one of a plurality of rotating data storage disks with the surface being filled with a pattern of alternating bursts which are read for relative ...


35
Richard M Ehrlich, David B Jeppson: Digital multi-rate notch filter for sampled servo digital control system. Quantum Corporation, David B Harrison, June 28, 1994: US05325247 (72 worldwide citation)

A digital servo control loop for a disk drive head position actuator implements a multi-rate notch filter in order to eliminate actuator resonances at frequencies above the sampling rate Nyquist frequency. The control loop includes circuitry responsive to the periodic digital position values sampled ...


36
Hung C Nguyen, Brian N Kuo: Data encoding and decoding within PRML class IV sampling data detection channel of disk drive. Quantum Corporation, David B Harrison, November 9, 1993: US05260703 (71 worldwide citation)

A serializer/deserializer encoder-decoder for a disk drive achieves increased storage capacity through the use of partial response maximum likelihood class IV (PRML-IV) coding. Reduction of hardware requirements is realized by the integration of similar read and write mode functions into common circ ...


37
Ewaryst Z Polch, Carl D Williams, Jackie Cordova: Hydrodynamic bearing having inverted surface tension seals. Quantum Corporation, David B Harrison, William J Kubida, July 9, 1996: US05533811 (70 worldwide citation)

An improved hydrodynamic bearing comprising a longitudinally extending sleeve and an elongated shaft with the shaft being disposed within the sleeve for rotation relative thereto. A first thrust plate is coupled to one end of the shaft and a second thrust plate is coupled to the opposite end. A lubr ...


38
John Edward Maroney: Computer architecture for automated storage library. Quantum Corporation, David B Harrison, Brown Martin Haller & McClain, July 20, 1999: US05925119 (69 worldwide citation)

A computer architecture for an automated data storage library including a high-speed local bus with support for expansion slots and the ability to transfer data blocks in parallel. The high-speed local bus preferably adheres to industry standards for computers, thus providing the ability in a librar ...


39
Neville K Lee, Kwan Y Tan: Double-sided optical media for a disk storage device. Quantum Corporation, David B Harrison, November 28, 1995: US05470627 (68 worldwide citation)

A double-sided optical storage disk comprises a single substrate having a microstructure formed on each side surface thereof. The microstructure is in the form of grooves or pits arranged in a spiral or concentric circles. Formed on each side surface of the substrate are a reflective layer, and a tr ...


40
Kevin D Fisher, Jim Fitzpatrick, Xiaodong Che: Synchronous detection of concurrent servo bursts for fine head position in disk drive. Quantum Corporation, David B Harrison, Debra A Chun, November 19, 1996: US05576906 (68 worldwide citation)

Synchronous detection of fine position servo burst information with a data transducer having an electrical width not less than about two-thirds a width of a data track within a partial response maximum likelihood (PRML) data channel is disclosed. The servo burst information is recorded on a storage ...