Using the bridge volume and the internal snapshot copy of the data which is in the midst of transferring, method and its system which transfer the data with the primary storage and the secondary store

摘要

(57) Abstract The primary memory system, includes plural primary memory volume and one primary bridge volume, method and the system in order the secondary storage system, includes plural secondary storage volume and one secondary bridge volume, from the primary memory system to transfer the data to the secondary storage system are offered. Link is established with the above-mentioned primary bridge volume and the above-mentioned secondary bridge volume. Next, the data which is transferred to the secondary storage volume which corresponds from primary memory volume is copied on primary bridge volume by the pointer to the data of the above-mentioned primary memory volume, (internal snapshot copy). Next, the data which snapshot was copied from the above-mentioned primary bridge volume is transferred to the above-mentioned secondary bridge volume through the above-mentioned link. Next, as for the data, because the above-mentioned primary memory volume and the secondary storage volume which corresponds same period it can point, it is sent to the secondary storage volume which from the above-mentioned secondary bridge volume corresponds to the above-mentioned primary memory volume. With this process, using bridge volume, other than burden of data transfer, it is possible to process the burden of data same period, the host the necessity to compete in order to access primary memory volume is gone with that.