Title:
OPTIMAL READER/WRITER OFFSETS AND WRITE FAULT THRESHOLDS IN A DISC DRIVE
Document Type and Number:
WIPO Patent Application WO2000049606
Kind Code:
A3
Abstract:
A method for optimizing data transfer performance (200) in a disc drive (100) through selection of optimal reader/writer offsets (280, 300) and write fault thresholds (284, 286, 302, 304). During a reader/writer offset calibration operation (222), an initial offset (294) for a selected track (174, 270) is determined as the radial distance between read and write elements (224, 226) of a head (118) as the head is positioned adjacent the selected track. A write threshold analysis (258) selects asymmetric write fault thresholds (296, 298) on opposing sides of the center of the selected track in relation to the ability of the read element to successfully recover data written to the track. The initial offset is adjusted (278) by an adjustment value determined in relation to the asymmetry of the write fault thresholds, and final write fault thresholds are selected (282) to be symmetric about the center of the selected track.
Inventors:
ABDELNOUR GHASSAN M
Application Number:
PCT/US2000/004479
Publication Date:
December 14, 2000
Filing Date:
February 22, 2000
Export Citation:
Assignee:
SEAGATE TECHNOLOGY (US)
International Classes:
G11B5/012; G11B5/55; G11B5/596; G11B19/04; G11B21/10; G11B27/36; G11B5/39; G11B5/48; G11B20/10; (IPC1-7): G11B5/596; G11B19/04; G11B21/10
Foreign References:
| US5790333A | 1998-08-04 | |||
| EP0929067A1 | 1999-07-14 |
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