ERROR CODE HANDLING IN A STORAGE SUBSYSTEM

Disclosed is a computer implemented method and apparatus for making ownership changes to a storage subsystem. The host sends the first ownership change command to the storage subsystem then determines whether the storage subsystem responded with an error message. Upon responding to a determination that the storage subsystem responded with the error message, the host determines whether the storage subsystem indicated an error associated with an ownership change. In response to a determination that the storage subsystem indicated an error associated with an ownership change, the host sends a discover ownership message to the storage subsystem. Upon receiving a list of logical unit number associations from the storage subsystem, the host responds to receiving a list of logical unit number associations. The host performs a second ownership command to determine whether the list of logical unit number associations matches an ownership defined in the ownership change command. The host responds to a determination that the list of logical unit number associations matches an ownership defined in the ownership change command by aborting ownership changes.