Roger Tim Hayes

US Patent:

6557141, Apr 29, 2003

Filed:

Dec 1, 1999

Appl. No.:

09/452519

Inventors:

Richard A. Gill - Arvada CO
Roger D. Hayes - Denver CO

Assignee:

Storage Technology Corporation - Louisville CO

International Classification:

G11C 2900

US Classification:

714771, 714719, 369 531

Abstract:

Write on the fly certification of magnetic media includes detecting the start of a defect. A sequence of defect matrices is written over the defect with a write element in a read-after-write head. Each defect matrix in the sequence is read with a read element in the read-after-write head. A check is made to determine if an error exists in the data read from each defect matrix. The defect is determined to extend through each defect matrix if an error exists in the read data.

US Patent:

6937412, Aug 30, 2005

Filed:

Jul 26, 2002

Appl. No.:

10/206317

Inventors:

Richard Allen Gill - Arvada CO, US
Roger D. Hayes - Denver CO, US
Keith Gary Boyer - Broomfield CO, US

Assignee:

Storage Technology Corporation - Louisville CO

International Classification:

G11B005/09

US Classification:

360 48

Abstract:

A method, apparatus, and computer instructions for writing data to a magnetic media. A first frequency is written on a first track on the magnetic media on a first track width. A second frequency is written on the first track in which a combination of the first frequency and the second frequency encodes a bit of data on the first track. An erase pattern is created on a second track on the magnetic media, the second track being adjacent to the first track in which the bit of data on the first track is readable by a tape drive system having a second track width wider than the track width of the first track.

US Patent:

6947241, Sep 20, 2005

Filed:

Aug 7, 2002

Appl. No.:

10/213945

Inventors:

Richard Allen Gill - Arvada CO, US
Roger D. Hayes - Denver CO, US
Keith Gary Boyer - Broomfield CO, US

Assignee:

Storage Technology Corporation - Louisville CO

International Classification:

G11B019/02

US Classification:

360 722

Abstract:

An asynchronous method for locating individual blocks of data in a tape drive, without having to read the blocks of data is provided. The invention comprises placing an ID mark adjacent to the data blocks and inter-block gaps on the tape. The ID mark contains a small amount of information about the next respective data block on the tape. The ID mark is encoded such that the same detection mechanism that detects the inter-block gap can also retrieve the ID mark information, without having to process the entire block of data associated with a particular ID mark. The ID mark is symmetrical such that it can be detected and decoded in the forward and backward direction, allowing the tape drive to find a desired block of data by searching either forward or backward, even when the magnetic tape uses a unidirectional data format.

US Patent:

7633700, Dec 15, 2009

Filed:

Jun 16, 2006

Appl. No.:

11/454496

Inventors:

Richard A. Gill - Arvada CO, US
Roger D. Hayes - Denver CO, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

G11B 19/02

US Classification:

360 721, 360 48

Abstract:

A method for contiguously appending data onto media in a tape drive system is disclosed. In one embodiment, the method includes reading existing data recorded on a media, determining an append point on the media, and contiguously appending new data on the media starting at the append point such that any end pad is eliminated and no intermediate pads are resulted. Other embodiments are also disclosed.

US Patent:

7633701, Dec 15, 2009

Filed:

Jun 16, 2006

Appl. No.:

11/454497

Inventors:

Richard A. Gill - Arvada CO, US
James Wolf - Tucson AZ, US
Randy Allen Fout - Lyons CO, US
Roger D. Hayes - Denver CO, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

G11B 15/18

US Classification:

360 721, 360 48, 711 4

Abstract:

A method for increasing recording format reliability in a tape drive system is disclosed. In one embodiment, the method includes identifying a default media information region (MIR) on a media, wherein the default MIR includes MIR information divided into segments, reading the MIR information, rotating the MIR information into a first rotation MIR information by rotating the segments by one segment; and writing the first rotation MIR information into a first MIR on the media. Other embodiments are also disclosed.