Control apparatus, method of controlling apparatus and computer-readable recording medium

A method of controlling an apparatus having a memory unit for storing data sent out from a host, a first tape writing unit including a plurality of first tapes, a second tape writing unit including a plurality of second tapes, and a controller for controlling the first tape writing unit and the second tape writing unit, the method comprising:

• controlling the first tape writing unit and the second tape writing unit so that the first and second writing units write same data stored in the memory unit into one of the first tapes and one of the second tapes, respectively;
• obtaining progress information indicating a state of writing data into the one of the second tapes upon completely writing the data into one of the first tapes;
• and
• controlling the second tape writing unit to set a writing process priority of the one of the second tapes to be lower than a writing process priority of others of the second tapes and to continue to write the data in the memory unit into the one of the second tapes based on the progress information.

A non-transitory machine-readable storage medium that stores a computer program for controlling an apparatus connectable to a memory unit for storing data sent out from a host, to a process comprising:

• controlling a first tape writing unit including a plurality of first tapes and a second tape writing unit including a plurality of second tapes so that the first and second writing units write same data stored in the memory unit into one of the first tapes and one of the second tapes, respectively;
• obtaining progress information indicating a state of writing data into the one of the second tapes upon completely writing the data into the one of the first tapes;
• and
• controlling the second tape writing unit to set a writing process priority of the one of the second tapes to be lower than a writing process priority of others of the second tapes and to continue to write the data in the memory unit into the one of the second tapes based on the progress information.