Information processing system, primary storage device, and computer readable recording medium recorded thereon logical volume restoring program

A primary storage device interposed between a secondary storage device retaining a recording medium configuring a virtual logical volume and a data processing apparatus processing data recorded in the virtual logical volume of said secondary storage device, said primary storage device comprising:

• at least two current storage units configuring a logical volume in which data read out from the virtual logical volume of said secondary storage device in order that said data processing apparatus has an access to the data to process the same is recorded, and being in a mirroring relationship;
• at least two spare storage units which can be used in the mirroring relationship;
• and
• a restoring unit for, when said at least two current storage units concurrently fail, reading out data recorded in the logical volume of said current storage units from the virtual logical volume of said secondary storage device, recording the data on said at least two spare storage units, thereby restoring, on said at least two spare storage units, the logical volume of said at least two current storage units.

A computer readable recording medium recorded thereon a logical volume restoring program for making a computer realize a function of restoring a logical volume configured by at least two current storage units when said at least two current storage units concurrently fail in a primary storage device which is interposed between a secondary storage device retaining a recording medium configuring a virtual logical volume and a data processing apparatus processing data recorded in the virtual logical volume of said secondary storage device, configures the logical volume in which the data read out from the virtual logical volume of said secondary storage device in order that said data processing apparatus has an access to the data to process the same is recorded, and comprises said at least two current storage units being in a mirroring relationship and at least two spare storage units which can be used in the mirroring relationship;

• said computer readable recording medium making said computer function as a restoring unit for, when said at least two current storage units concurrently fail, reading out data recorded in the logical volume of said current storage units from the virtual logical volume of said secondary storage device, recording the data on said at least two spare storage units, thereby restoring, on said at least two spare storage units, the logical volume of said at least two current storage units.