Patent ID: 9021223
Filing Date: 2015-04-28
Classification: G06F

Abstract:
1. A master intelligent storage element (ISE) and a redundant ISE each individually connectable in communication with a host device via a computer network connection, the master ISE executing data path algorithms stored in a computer memory and configured so that the master ISE, in response to receiving an access command from the host device for a logical unit (LUN) that is controlled by the master ISE, establishes a peer-to-peer communication connection with the redundant ISE via the network that exists independently of the redundant ISE network connection with the host device, the peer-to-peer communication connection used to perform data transfers between the master ISE and the redundant ISE that are predefined by the data path algorithms to maintain data coherency between the master ISE and the redundant ISE by ensuring that the master ISE marks transferred data as being dirty before the redundant ISE marks the transferred data as being dirty during the data transfers.