Storage control device and storage control method

A storage control method for controlling a plurality of solid state drives including a first solid state drive, the storage control method comprising:

• detecting, by a processor, a wear state of each of the plurality of solid state drives;
• separating, by the processor, a solid state drive of the plurality of solid state drives having a wear value, which represents a wear state, exceeding a first threshold;
• and
• when the wear value of the first solid state drive exceeds a second threshold less than the first threshold, enlarging, by the processor, a difference in the wear value between the first solid state drive and another of the plurality of solid state drives by reducing a spare area of the first solid state drive, the spare area being used for replacing a defective block, and
• determining, by the processor, that that the wear value of the first solid state drive reaches the first threshold, when the reduced spare area of the first solid state drive has been exhausted by an increase in a number of defective blocks.

A storage control device that controls a plurality of solid state drives including a first solid state drive, the storage control device comprising:

• a memory;
• and
• a processor coupled to the memory and configured to
• detect a wear value representing a wear state of each of the plurality of solid state drives,
• when the wear value of the first solid state drive exceeds a second threshold less than a first threshold, enlarge a difference in the wear value between the first solid state drive and another of the plurality of solid state drives by reducing a spare area of the first solid state drive, the spare area being used for replacing a defective block,
• determine that the wear value of the first solid state drive reaches the first threshold, when the reduced spare area of the first solid state drive has been exhausted by an increase in a number of defective blocks, and
• separate the first solid state drive.