Scalable disk array controller inter-connection network

Details Scalable disk array controller inter-connection network Scalable disk array controller inter-connection network

2006-02-14

2006-02-14

Anderson, Matthew D. (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S113000, C710S038000

Reexamination Certificate

active

07000070

ABSTRACT:
Disclosed herewith is a scalable disk array controller inter-connection network to be employed for a disk array system in which a plurality of disk array controllers connected to each another are expected to be operated as one disk array controller. The inter-connection network enables such disk array controllers to be added/removed without service interruption while the system reliability is kept as is. Each of the plurality of disk array controllers comprises a channel IF unit; a disk IF unit; a cache memory unit; a shared memory unit; means for connecting the channel IF unit/disk IF unit and the cache memory unit; and means for connecting the channel IF unit/disk IF unit and the shared memory unit. The inter-connection network comprises a plurality of switches to be increased in a scalable manner. Each of the switches is inter-connected with other switches with use of a redundant path having a separated physical route. In addition, each of the switches has an output destination table used to set redundant paths and switches between paths after the inter-connection network is modified due to the addition/removal of the above switches. The disk array controller becomes cost-scalable because the disk array controller units can be added/removed to/from the system as required without service interruption while the system reliability is kept as is.

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Manfred Liebhart et al., “A Study of an SCI Switch Fabric”, Proceedings of the 5thInternational Workshop of Modeling, Analysis and Simulation of Computer and Telecommunications Systems, 1997 IEEE, pp. 162-169.

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