Moving Data Sets From Backup Volumes to Active Volumes
Original Publication Date: 1981-Dec-01
Included in the Prior Art Database: 2005-Feb-08
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.