Memory device and storage apparatus

A storage apparatus comprising:

• a plurality of memory devices;
• and
• a storage controller that is coupled to the plurality of memory devices,
• the plurality of memory devices including:
• a plurality of non-volatile semiconductor memories;
• and
• a device controller that is coupled to the plurality of non-volatile semiconductor memories and the storage controller,
• each of the plurality of non-volatile semiconductor memories including a plurality of storage circuits and a plurality of control circuits,
• the plurality of storage circuits being coupled to the device controller via the plurality of control circuits, respectively,
• each of the plurality of storage circuits including a plurality of blocks;
• each block being a unit of erasure of data,
• each of the plurality of blocks including a plurality of pages,
• each page being a unit of read and write of data, and
• the device controller being configured to, when the device controller reads data stored in a specific page in the plurality of non-volatile semiconductor memories to detect an uncorrectable error (UE) of the data stored in the specific page, execute a diagnosis process including specifying a specific storage circuit that is a storage circuit including the specific page, reading data stored in a block in a part of the specific storage circuit, and specifying, on the basis of a result of reading the data stored in the block in the part, a failure region in the specific storage circuit.