Storage control apparatus, storage apparatus, information processing system and processing method therefor

A storage apparatus comprising:

• a memory cell;
• a pre-processing-execution determining block configured to determine whether or not either one of an erase operation and a program operation is to be executed as pre-processing in a write operation to be carried out on a predetermined data area included in the memory cell to serve as a write-operation object;
• a pre-read processing block configured to read out pre-read data from the data area included in the memory cell to serve as a write-operation object prior to the write operation if a result of the determination indicates that the pre-processing is to be executed;
• and
• a bit operating block configured to carry out
• the pre-processing and one of the erase and program operations which is not the pre-processing as post-processing if a result of the determination indicates that the pre-processing is to be executed, and
• the post-processing without carrying out the pre-processing if a result of the determination indicates that the pre-processing is not to be executed.

An information processing system comprising:

• a memory cell;
• a pre-processing-execution determining block configured to determine whether or not either one of an erase operation and a program operation is to be executed as pre-processing in a write operation to be carried out on a predetermined data area included in the memory cell to serve as a write-operation object;
• a pre-read processing block configured to read out pre-read data from the data area included in the memory cell to serve as a write-operation object prior to the write operation if a result of the determination indicates that the pre-processing is to be executed;
• a bit operating block configured to carry out
• the pre-processing and one of the erase and program operations which is not the pre-processing as post-processing if a result of the determination indicates that the pre-processing is to be executed, and
• the post-processing without carrying out the pre-processing if a result of the determination indicates that the pre-processing is not to be executed;
• and
• a host computer configured to issue a read command or a write command to the memory cell.

A storage control method comprising:

• determining whether or not either one of an erase operation and a program operation is to be executed as pre-processing in a write operation to be carried out on a predetermined data area included in a memory cell to serve as a write-operation object;
• reading out pre-read data from the data area included in the memory cell to serve as a write-operation object prior to the write operation if a result of the determination indicates that the pre-processing is to be executed;
• and
• carrying out the pre-processing and one of the erase and program operations which is not the pre-processing as post-processing if a result of the determination indicates that the pre-processing is to be executed, and carrying out the post-processing without carrying out the pre-processing if a result of the determination indicates that the pre-processing is not to be executed.