Storage control system

Abstract

Abstract PURPOSE:To increase the substantial storage capacity of a computer system without increasing the capacity of a main storage device, by executing a data transfer between an extended storage device and an external storage device through a specific area of the main storage device, so that a dead capacity of the extended storage device always exceeds a prescribed quantity. CONSTITUTION:When a frame 6a of an extended storage device 6 has been allocated in order to transfer the contents of a frame 2a of a main storage device 2, in case a dead frame quantity of the extended storage device 6 is below a prescribed quantity, plural frames are selected under a prescribed algorithm from in the frame of the extended storage device 6. Subsequently, its contents are transferred to a specific area 2b of the main storage device, which has been secured in advance, and thereafter, the contents of this area are written and saved in an external storage device 5. As a result, the frame of the extended storage device 6, whose contents have been saved can be utilized again as a dead frame. In this way, the substantial storage capacity of this kind of computer system is increased without increasing the storage capacity of the main storage device 2.

Inventors

• 👤 Katsushi Asami
• 👤 可津志 浅見

Bibliographic Details