| 摘要 |
To provide an information recording apparatus capable of continuing appropriate update processing in the case where data updating processing is stopped on one processing apparatus due to a power failure or memory failure, etc. by using un-updated data stored in duplicate in the other processing apparatus. There is provided an information recording apparatus including a plurality of controlling units for recording data received from a host device on an information recording medium, each of which has memory, characterized in that the data is temporarily stored in memory of one controlling unit and at the same time is stored in duplicate in memory of another controlling unit and, when data recording processing carried out by the one controlling unit is stopped, the recording processing is continued by the other controlling unit by using the duplicated data, and a point at which the data updating processing in the one control apparatus becomes irreversible is notified from the control apparatus to the control apparatus having the duplicated data.
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