Possible Effect: Access to disk shelf 1.21 via controller node01 might be lost with a failure of controller 0v port, a Consult the guide applicable to your IOM12 disk shelf to review cabling rules and...Possible Effect: Access to disk shelf 1.21 via controller node01 might be lost with a failure of controller 0v port, a Consult the guide applicable to your IOM12 disk shelf to review cabling rules and complete the SAS cabling worksheet for your system. Verify that controller node01 is cabled to IOM A at one end and IOM B at another end of stack 1. If disk shelf 1.21 is located between two disk shelves within stack 1, verify that IOM A and IOM B are properly cabled to their independent domains.