Method and apparatus for transferring data and making on-the-fly

Details Method and apparatus for transferring data and making on-the-fly Method and apparatus for transferring data and making on-the-fly

1995-01-27

1997-12-02

Psitos, A.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

G11B 509

Patent

active

056942621

ABSTRACT:
A method and apparatus for transferring data in a disc apparatus are disclosed which perform on-the-fly correction. The disc apparatus includes a disc drive for transferring read data to a disc controller after a head has read the data from a storage disc. This disc controller transfers the data from the disc drive to a host device. The data transferring method reads data recorded on the storage disc in a CKD format in which one block is composed of a plurality of subblocks each having an error correction code. Errors in the data are detected by use of an error detection code on a subblock-unit; and after correcting the data of the error-detected subblock, the corrected data on the subblock-unit are transferred with the data of at least the previous subblock, at a speed higher than a reading speed. The data transferring apparatus includes a read circuit for reading data recorded in a CKD format on the storage disc, in which one block is composed of a plurality of subblocks each having an error correction code. An error detection circuit detects an error in the read data by use of the error detection code on the subblock-unit; and a transfer circuit corrects the data of the error-detected subblock, and transfers the corrected data on the subblock-unit and, at the same time, transfers the data of at least the subblock positioned previous to the disc controller at the speed higher than the reading speed.

REFERENCES:
JP reference No. 4-326687, English Abstract, "Recording and Reproducing Device" Mar. 31, 1993, Muto.

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