Patent ID: 6931567

Claim:
A storage system with redundant components comprising: a plurality of disk devices; a first controller having a first current port connected to a first host and a first standby port connected to a second host, said first controller connected to said disk devices for data exchange between said first host and said disk devices via said first current port; a second controller having a second current port connected to said second host and a second standby port connected to said first host, said second controller connected to said disk devices for data exchange between said second host and said disk devices via said second current port, said second controller having stored therein port configuration information representative of said first current port; and a plurality of communication lines between said first controller and said second controller, said first controller configured to detect an error condition therein and in response to detecting said error condition, to communicate an error indication to said second controller, said second controller configured to detect receipt of said error indication and in response to receiving said error indication to configure said second standby port for data exchange between said first host and said disk devices based on said port configuration information.