Method and apparatus for enhanced data channel performance...

Details Method and apparatus for enhanced data channel performance... Method and apparatus for enhanced data channel performance...

2005-08-30

2005-08-30

Faber, Alan T. (Department: 2651)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

C360S046000

Reexamination Certificate

active

06937415

ABSTRACT:
A method and apparatus are provided for implementing enhanced data channel performance using a read sample buffer in a direct access storage device (DASD). Disk data is read and stored in the read sample buffer. When a data recovery procedure (DRP) starts, the stored disk read data in the read sample buffer is detected. Error correction code (ECC) checking of the detected sample buffer disk data is performed to identify correctly recovered data. Using the disk read data stored in the read sample buffer enables data recovery without identification of a sync word. Also using the disk read data stored in the read sample buffer enables data recovery with changed channel data detection settings to recover the data. The read sample buffer can be used for accumulating read disk data from more than one read operation so that at least some channel noise is averaged out.

REFERENCES:
patent: 5220569 (1993-06-01), Hartness
patent: 6130794 (2000-10-01), Christensen

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