Improving Performance of Buffered DASD to which some References are Sequential
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
A buffered DASD (direct-access storage device) subsystem consists of direct-access storage devices, a controller, and a buffer memory. The buffer is managed by the controller, and used to store data in transit between the devices and a CPU. Typically, the buffer is managed by a least recently used (LRU) algorithm at the track level.