Clustered array controller for global redundancy in a san

An apparatus comprising:

• means for connecting a first one or more of a plurality of host devices to a first one or more of a plurality of storage arrays, said first array module comprising a primary controller and a secondary controller;
• and
• means for connecting a second one or more of said plurality of host devices to a second one or more of said plurality of storage arrays, said second array module comprising a primary controller and a secondary controller, wherein control of access to said storage arrays is transferred to said secondary controller of said first array module during a failure of said primary controller of said first array module.

A method of implementing a clustered array controller for global redundancy, comprising the steps of:

• connecting a first one or more of a plurality of host devices to a first one or more of a plurality of storage arrays, said first array module comprising a primary controller and a secondary controller;
• and
• connecting a second one or more of said plurality of host devices to a second one or more of said plurality of storage arrays, said second array module comprising a primary controller and a secondary controller, wherein control of access to said storage arrays is transferred to said secondary controller of said first array module during a failure of said primary controller of said first array module.