Dynamic magnetic information storage or retrieval – Checking record characteristics or modifying recording...
Reexamination Certificate
2005-10-18
2005-10-18
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Checking record characteristics or modifying recording...
Reexamination Certificate
active
06956707
ABSTRACT:
A slider having leading and trailing edges is configured to fly on an airbearing adjacent a data storage disk rotating from the leading edge to the trailing edge. Read and write heads are mounted on the slider proximate the trailing edge. An auxiliary thermal sensor is mounted on the slider, but preferably nearer the leading edge. Forward placement of the sensor allows it to sense mechanical defects before they reach the heads, thereby permitting a write inhibit operation, for example. The sensor may also be used to detect airbearing modulation. Appropriate action may be taken when unacceptable airbearing modulation is detected, such as notifying the user and/or scrubbing the slider. The sensor is preferably wider than the heads. This allows, for example, an in-situ glide test to be performed faster using the sensor. An arm electronics module is preferably configured to permit concurrent operation of the sensor and heads.
REFERENCES:
patent: 4669011 (1987-05-01), Lemke
patent: 5721457 (1998-02-01), Sri-Jayantha et al.
patent: 5739972 (1998-04-01), Smith et al.
patent: 5751510 (1998-05-01), Smith et al.
patent: 5838514 (1998-11-01), Smith et al.
patent: 5872676 (1999-02-01), Smith et al.
patent: 6011666 (2000-01-01), Wakamatsu
patent: 6018428 (2000-01-01), Okamura
patent: 6049439 (2000-04-01), Ono et al.
patent: 6084753 (2000-07-01), Gillis et al.
patent: 6084754 (2000-07-01), Smith et al.
patent: 6088176 (2000-07-01), Smith et al.
patent: 6216242 (2001-04-01), Schaenzer
patent: 6452735 (2002-09-01), Egan et al.
U.S. Appl. No. 09/772,654, “Method and Apparatus for Positioning a Transducer Using a Phase Difference in Surface Profile Variations on a Storage Medium”, Hal H. Ottesen et al., filed Jan. 29, 2001.
U.S. Appl. No. 09/811,287, “Method and Apparatus for Estimating the Flyheight of an Airbearing Slider in a Storage Device”, James H. Brannon et al., filed Mar. 16, 2001.
U.S. Appl. No. 09/811,015, “Method and Apparatus for Estimating the Flyheight of an Airbearing Slider in a Storage Device Using Variable Spindle Velocity”, Hal H. Ottesen et al., filed Mar. 16, 2001.
U.S. Appl. No. 09/722,670, “Storage Disk Having Surface Profile Variations Patterned to Reduce Slider Airbearing Modulation”, Hal H. Ottesen et al., filed Jan. 29, 2001.
Ottesen Hal Hjalmar
Smith Molly
Sri-Jayantha Sri M.
Crawford & Maunu PLLC
Hitachi Global Storage Technologies - Netherlands B.V.
Hudspeth David
Rodriguez Glenda P.
LandOfFree
Method for look-ahead thermal sensing in a data storage device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for look-ahead thermal sensing in a data storage device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for look-ahead thermal sensing in a data storage device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3455385