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US 2003/0158980 A1Published application
Disk subsystem with cross-call function
AssigneeHitachi, Ltd.
InventorMakio Mizuno
Life of this patent
Estimating the term…
Abstract
Transmission/reception of each request is carried out through one and the same port. When requests are concentrated on one port, the port has to process all the requests. The processing load on the port increases correspondingly. A table in which request processing and its control information are recorded and a table in which ports that can be requested are recorded are prepared in a shared area inside a disk subsystem. Processing is requested with reference to those tables. The load on the port on which requests are concentrated is distributed, and the throughput to request sources is improved.
Claims15
A disk subsystem comprising:
- a disk unit;
- a disk access controller for controlling said disk unit;
- and
- a channel controller for making communication with a host computer;
- wherein said channel controller has a plurality of I/O ports passed by signals for making communication with said host computer;
- wherein said I/O ports have control processors for controlling said signals passing said I/O ports, respectively;
- and
- wherein said channel controller chooses, among said plurality of I/O ports, an I/O port through which a reply to said host computer is to be transmitted.
5 more elements
Dependencies are inferred from the claim text.