Browse Prior Art Database

Moving Data Sets From Backup Volumes to Active Volumes

IP.com Disclosure Number: IPCOM000048071D
Original Publication Date: 1981-Dec-01
Included in the Prior Art Database: 2005-Feb-08

Publishing Venue

IBM

Related People

Authors:
Bittihoffer, JR [+details]

Abstract

In peripheral storage, active volumes, such as direct access storage devices (DASDs) of high performance act as a front store. Backup volumes, i.e., lower performance volumes, such as magnetic tape and lower performance DASD, receive those data sets from the active volumes as backup. Occasionally, the data sets stored in the backup volumes have to be retrieved. To efficiently retrieve the backup volumes, sequence numbers are assigned to the data sets as they are lodged in the backup volumes. Recovery then is based upon of a magnetic tape will recover all data sets on that volume desired to be recovered at the particular time.