Preservation of Volume Integrity
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
In current data processing systems (Fig. 1) data is transferred betwee direct-access storage devices (DASDs) 10 and main storage facilities 12 in central host processing subsystems 14 via 1/0 channels 16 and I/0 control units 18. In the host system the data may be processed by one or more central processing units 20. The supervisory programs which control the host system may be adapted to maintain record logs of the integrity of volumes stored on the DASDs, e.g., to insure that I/0 data transfer requests are directed to appropriate volumes and to authorized or appropriate areas on such volumes.