Data storage device, reconstruction controlling device, reconstruction controlling method, and storage medium

A data storage device having a data processing section for reading and writing a plurality of processing units obtained by dividing one piece of processing data in parallel with each other between the data processing unit and a plurality of storage media, and a data processing unit for reading and writing redundant data used in restoring the processing data, said data storage device comprising:

• an input-output state determining unit for determining whether a command process involved in one of input and output of processing data from and to an outside of the device is being performed or waiting to be performed;
• a reconstruction request determining unit for determining whether there is a request for a process of reconstructing stored data which process accompanies replacement of a faulty part;
• and
• a reconstruction process performing unit for giving an instruction to execute a reconstruction command when said input-output state determining unit determines that the command process involved in one of input and output of processing data from and to the outside of the device is not being performed nor waiting to be performed, and when said reconstruction request determining unit determines that there is a request for the process of reconstructing stored data which process accompanies replacement of a faulty part.

A reconstruction controlling device for controlling an operation of reconstructing stored data in a data storage device having a redundant storage area for processing data, said reconstruction controlling device comprising:

• an input-output state determining unit for determining whether a command process involved in one of input and output of processing data from and to an outside of the device is being performed or waiting to be performed;
• a reconstruction request determining unit for determining whether there is a request for a process of reconstructing stored data which process accompanies replacement of a faulty part;
• and
• a reconstruction process performing unit for giving an instruction to execute a reconstruction command when said input-output state determining unit determines that the command process involved in one of input and output of processing data from and to the outside of the device is not being performed nor waiting to be performed, and when said reconstruction request determining unit determines that there is a request for the process of reconstructing stored data which process accompanies replacement of a faulty part.

A reconstruction controlling method for controlling an operation of reconstructing stored data in a data storage device having a redundant storage area for processing data, said reconstruction controlling method comprising:

• a step of determining whether a command process involved in one of input and output of processing data from and to an outside of the device is being performed or waiting to be performed;
• a step of determining whether there is a request for a process of reconstructing stored data which process accompanies replacement of a faulty part;
• and
• a step of giving an instruction to execute a reconstruction command when it is determined that the command process involved in one of input and output of processing data from and to the outside of the device is not being performed nor waiting to be performed, and when it is determined that there is a request for the process of reconstructing stored data which process accompanies replacement of a faulty part.

A storage medium on which a program is recorded, said program making a computer for controlling a processing operation of a data storage device having a redundant storage area for processing data perform:

• a step of determining whether a command process involved in one of input and output of processing data from and to an outside of the device is being performed or waiting to be performed;
• a step of determining whether there is a request for a process of reconstructing stored data which process accompanies replacement of a faulty part;
• and
• a step of giving an instruction to execute a reconstruction command when it is determined that the command process involved in one of input and output of processing data from and to the outside of the device is not being performed nor waiting to be performed, and when it is determined that there is a request for the process of reconstructing stored data which process accompanies replacement of a faulty part.