Error recovery data storage system and method with two position

Details Error recovery data storage system and method with two position Error recovery data storage system and method with two position

1993-05-19

1994-10-04

Hajec, Donald

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360 7713, G11B 509, G11B 5584

Patent

active

053531701

ABSTRACT:
A direct access storage device (DASD) system uses a read/write head having a wide transducer write element and a narrow magneto-resistive read element. In order to avoid mistakenly reading a incompletely erased old data field, the system uses a verification procedure. Data are read at two positions along the data track which are separated by a radial distance D. This distance D is selected to be greater than the width of any incompletely erased data record. If the data read at the two read positions are equal, then the data are deemed to be correct and are sent to a host system.

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