Dual controller system for dynamically allocating control of...

Details Dual controller system for dynamically allocating control of... Dual controller system for dynamically allocating control of...

2005-09-27

2005-09-27

Peikari, B. James (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Memory configuring

C711S112000, C711S004000, C711S005000, C710S008000, C718S105000

Reexamination Certificate

active

06950920

ABSTRACT:
A disk array system of the type that each controller has an independent and dedicated cache. The disk array system can change control of a desired volume between desired controllers without suspending the system. When volumes are taken over between controllers, a switch-source controller de-stages data of a subject volume on the data cache to a storage subject disk to maintain the disk content reflection (coherency). Even if each controller has an independent and dedicated cache, a desired volume can be taken over between desired controllers without suspending the system. Each controller has a configuration manager which stores the controller number of a switch-destination controller to allow automatic volume take-over and automatic control by the original controller.

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