Patent ID: 8782357

Claim:
A method of accessing mirrored data after reversing a communication path between a first volume on a first storage device and a mirrored second volume on a second storage device, comprising: allowing access to the mirrored data prior to synchronizing the mirrored data between the first volume and the second volume; if an initial version of the mirrored data is provided on the first volume, accessing the mirrored data on the first volume; if the initial version of the mirrored data is provided on the second volume and the initial version of the mirrored data has been copied from the second volume to the first volume, accessing the mirrored data on the first volume; and if the initial version of the mirrored data is provided on the second volume and the initial version of the mirrored data has not been copied from the second volume to the first volume, accessing the mirrored data on the second volume prior to synchronizing the mirrored data between the first volume and the second volume.