Browse Prior Art Database

Data Recovery Upon the Occurrence of Errors in Data Exchange

IP.com Disclosure Number: IPCOM000041524D
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Yu, KM: AUTHOR [+3]

Abstract

In the present-day office information systems environment, the exchange of data between various word processing and data processing systems is routine. When carrying out such a data exchange, it is conventional to convert internal files to the various processors into exchange data sets. Errors can occur during such conversion. The present expedients ensure that whenever such errors occur whatever has been converted will be retained as usable. By way of example, suppose there was a conversion from an internal file to an exchange data set and an error occurred. What has to be determined is the number of records already converted and a restart number. Thus, if an error does occur with respect to anything on an exchange disk or diskette, no more data is recorded on this current disk and the task is terminated.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Data Recovery Upon the Occurrence of Errors in Data Exchange

In the present-day office information systems environment, the exchange of data between various word processing and data processing systems is routine. When carrying out such a data exchange, it is conventional to convert internal files to the various processors into exchange data sets. Errors can occur during such conversion. The present expedients ensure that whenever such errors occur whatever has been converted will be retained as usable. By way of example, suppose there was a conversion from an internal file to an exchange data set and an error occurred. What has to be determined is the number of records already converted and a restart number. Thus, if an error does occur with respect to anything on an exchange disk or diskette, no more data is recorded on this current disk and the task is terminated. Still, because of the available information, i.e., the restart number and the number of records converted, as well as the next exchange volume sequence number, the operator will still be able to use the data. When the operator wishes to continue the conversion, a new exchange disk or diskette is inserted and the restart number and the exchange volume number entered. Then, the conversion will resume. To summarize, if a permanent error occurs during conversion, such as a write error or disk full error, the operator will not lose what has been written into the disk or diskette.

1