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Seagate Assigned Four Patents

In situ sensor based contact detection, offset correction values on HDD, delayed disk drive preamplifier write turn on, encryption

In situ sensor based contact detection
Seagate Technology LLC, Cupertino, CA, has been assigned a patent (8,837,076) developed by nine co-inventors for “in situ sensor based contact detection.”

The co-inventors are CheeWee Cheng, Subhash Guddati, ShengYuan Lin, Andy Chou, SweeChuan Samuel Gan, Singapore, Stefan Ionescu, Burnsville, MN, Scott Ryun, Victoria, MN, Richard Martin, Longmont, CO, and Jesse Speckhard, Douglas, MA.

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Apparatus and method for positional sensing and control. In accordance with some embodiments, a transducer is positioned adjacent a recording medium. The transducer includes a write element, a read element, a heater and a thermally responsive sensor. Power is applied to the heater to establish a selected fly height of the transducer relative to the medium. A contact event between the transducer and the medium is detected responsive to an accumulated plural count of pulses in a bias signal obtained from the thermally responsive sensor.”

The patent application was filed on March 15, 2013 (13/844,643).

Offset correction values on a data storage media
Seagate Technology, Cupertino, CA, has been assigned a patent (8,848,310) developed by Bruce Douglas Buch, Westborough, MA, for “offset correction values on a data storage media.

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A memory system includes a storage medium having tracks arranged on the storage medium. The tracks include data track portions configured to store data. The tracks have a data track width and offset correction portions having a width that is greater than the data track width of the associated data track. Each offset correction portion stores one or both of positional offset correction values and timing offset correction values. The positional offset correction values are configured to correct for errors that occur in cross track positioning relative to the medium and the timing offset correction values are configured to correct for errors that occur in down track timing relative to the medium.”

The patent application was filed on Jan. 4, 2013 (13/734,036).

Delayed disk drive preamplifier write turn on
Seagate Technology, Cupertino, CA, has been assigned a patent (8,837,073) developed by Dale Thomas Riley, Longmont, CO, and Matthew Ian Robinson, Loveland, CO, for a “delayed disk drive preamplifier write turn on.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Approaches described in this disclosure are generally directed to methods and devices for delaying a write turn-on of a memory device. A write control signal from a memory controller to a preamplifier of a storage device is asserted. A warm-up interval of write drivers of the preamplifier is initiated, the warm-up interval having a duration of predetermined length. Data is transmitted to the write drivers during the warm-up interval.

The patent application was filed on March 21, 2012 (13/426,320).

Data transcription in storage device
Seagate Technology, Cupertino, CA, has been assigned a patent (8,832,458) developed by Laszlo Hars, Cranberry Township, PA, and Robert H. Thibadeau, Pittsburgh, PA, for “data transcription in a storage device.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A method of protecting information in a storage device is provided. The method includes receiving, in the storage device, encrypted data via a host computer in which the storage device is employed. The encrypted data is then decrypted, and re-encrypted, in the storage device, either before storage or just before data is transferred back to the host computer. The decryption and re-encryption (transcription) is performed substantially independently of the host computer. In addition, a storage device, readable by a computer system, for implementing the above method for protecting information is provided.

The patent application was filed on March 22, 2005 (11/085,923).

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