Control device, disk array device, and control method

A disk array device having a storage unit which stores data, the disk array device comprising:

• first and second devices for processing data which is transferred from a higher level device and is input to the storage unit or output from the storage unit;
• a transfer unit for transferring data to the first or second device by using a path that can switch a transferring destination of data to the first or second device;
• a judgment unit for judging whether processing the data by firmware controlling the first device is completed, the data transferred to the first device by the transfer unit;
• a switching control unit for switching the transferring destination of data to the second device in the transfer unit when the judgment unit judges that processing of the data is completed;
• and
• an update unit for updating the firmware controlling the first device after the switching control unit switches the transferring destination of data to the second device in the transfer unit.

A control method for updating firmware, the method comprising:

• transferring data to a first device or a second device by using a path that can switch a transferring destination of data to the first or second device;
• judging whether processing the data by the firmware controlling the first device is completed;
• switching the transferring destination of data to the second device when it is judged that processing of the data is completed;
• and
• updating the firmware controlling the first device after the transferring destination of data is switched to the second device.

A control method comprising:

• transferring data to a device by using a path that can switch a transferring destination of data;
• judging with a microprocessor whether processing the data by firmware controlling the device is completed;
• and
• updating the firmware controlling the device after a transferring destination of data is switched to another device.