Browse Prior Art Database

Diskette Data Recovery

IP.com Disclosure Number: IPCOM000051172D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 18K

Publishing Venue

IBM

Related People

Dix, GL: AUTHOR [+2]

Abstract

This technique enables recovery of customer data in the event that a sector identification (ID) field becomes defective on a diskette. Such data would otherwise be lost in those devices where, during normal processing, the ID field must be correctly read prior to reading the data. This technique utilizes any previous ID as a reference point, counts subsequent data fields, and then reads the desired data field without requiring its ID field to be readable.

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Diskette Data Recovery

This technique enables recovery of customer data in the event that a sector identification (ID) field becomes defective on a diskette. Such data would otherwise be lost in those devices where, during normal processing, the ID field must be correctly read prior to reading the data. This technique utilizes any previous ID as a reference point, counts subsequent data fields, and then reads the desired data field without requiring its ID field to be readable.

In the example shown in the figure, the second ID field has become defective. Recovery operation proceeds as follows: 1. The preceding ID (ID1) is readable and Is read to obtain a

2. The following data (DATA1) and ID field (ID2) are skipped.

3. The desired data field (DATA2) is read.

In the general case, any readable lD on a track may be specified and any number of data and ID fields may be skipped.

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