Patent ID: 7882316

Claim:
A system for shared data mirroring, the system comprising: a network comprising at least one host and a plurality of storage devices; at least one backup component; a data mirror comprising at least one primary volume and at least one secondary volume, wherein the at least one backup component is configured to provide a gateway to the at least one secondary volume; and a processing node on the network, the processing node configured to record block address information, the processing node comprising: a response module configured to receive a tracking command in response to a backup component not being online and respond with status; an extraction module configured to extract block address information from the tracking command in response to the backup component not being online, wherein the block address information comprises time and date information; a log module configured to record the block address information on a tracking log and transfer log and transfer the block address information to a location on the network tracking log in response to the backup component not being online; and the response module further configured to extract block addresses from the tracking log, organize a block address list from the extracted block addresses, read blocks of the block address list from the at least one primary volume, and write the memory blocks to the at least one secondary volume when the backup component comes online.