Control system for disk cache

Abstract

Abstract PURPOSE:To improve processing efficiency by bringing a disk cache device which stores and holds properly data in a magnetic disk device and the magnetic disk device under the efficient control of plural magnetic disk controllers. CONSTITUTION:When a request for data transfer is sent from a host device 1 to, for example, a magnetic disk controller 2a, the magnetic disk controller 2a outputs a connection request to a control adapter 4 so as to select, for example, a magnetic disk device 5a on which desired data is present; when this device 5a is not used by a magnetic disk controller 2b, the control adapter 4 holds the connection between the devices 2a and 5a. Then when either of the magnetic disk controllers 2a and 23b selects a magnetic disk device and the other selects the same magnetic disk device during a read of the desired data from the disk cache device 3, the other magnetic disk controller is allowed to read data other than data being read out of said disk cache device 3.

Inventors

• 👤 Kazuhisa Seki
• 👤 和久 関

Bibliographic Details