Patent ID: 8028202

Claim:
A data management device to access a plurality of memories, the data management device comprising: a receiver to receive warning messages from the plurality of memories; a risk unit to determine a risk of failure associated with each memory of the plurality of memories on the basis of the received warning messages; a selection unit to select a first memory from the plurality of memories based on the determined risk of failure associated with each memory of the plurality of memories; a replication destination unit to determine an entire amount of free capacity of each of the plurality of memories is smaller than a specified amount of free capacity, and a risk associated with each of the plurality of memories; and a transmitting unit to transmit a delete instruction to a second memory of the plurality of memories to delete data corresponding to a replicated spare data, the replicated spare data is a second copy of a master data, the master data or a first copy of the master data is saved in another memory of the plurality of memories respectively; a replication instruction to the first memory to store in the second memory.