Image recording apparatus and image recording method for rapid mirroring restoration

1. An image recording apparatus comprising:

an image input which, in operation, receives first image data;

an image recorder which, in operation, records the first image data received via the image input, and second image data recorded in a first recording medium, in a second recording medium; and

a file system controller which, in operation,

sets writing start positions of the first image data and the second image data in the second recording medium;

controls cyclic recording of the first image data in the second recording medium from the writing start position in a first direction, and cyclic recording of the second image data in the second recording medium from the writing start position in a second direction opposite from the first direction;

and

controls ending recording of the second image data in the second direction in response to a recording position of the first image data meeting a recording position of the second image data in the second recording medium.

2. The image recording apparatus according to claim 1 ,

wherein the first recording medium and the second recording medium record image data in units of recording regions, and

wherein the file system controller, in operation,

controls recording of the first image data in recording regions of the second recording medium sequentially in the first direction, and recording of the second image data in recording regions of the second recording medium sequentially in the second direction, and

controls ending recording of the second image data in the second direction in response to the recording region in which the first image data is recorded coinciding with the recording region in which the second image data is recorded in the second recording medium.

3. The image recording apparatus according to claim 2 , wherein, in response to the recording region in which the first image data is recorded coinciding with the recording region in which the second image data is recorded in the second recording medium, the file system controller ends recording of the second image data after recording the second image data up to a terminal end of the coinciding recording region.

4. The image recording apparatus according to claim 1 , wherein the image input receives the first image data captured by a camera.

5. An image recording method implemented in an image recording apparatus comprising:

receiving first image data;

setting writing start positions of the received first image data, and second image data recorded in a first recording medium, in a second recording medium;

cyclically recording the first image data in the second recording medium from the writing start position in a first direction;

cyclically recording the second image data in the second recording medium from the writing start position in a second direction opposite from the first direction; and

ending recording of the second image data in the second direction in response to a recording position of the first image data meeting a recording position of the second image data in the second recording medium.

6. The imaging recording method according to claim 5 , comprising:

recording the first image data in recording regions of the second recording medium sequentially in the first direction;

recording the second image data in recording regions of the second recording medium sequentially in the second direction; and

ending recording of the second image data in the second direction in response to the recording region in which the first image data is recorded coinciding with the recording region in which the second image data is recorded in the second recording medium.

7. The imaging recording method according to claim 6 , comprising:

in response to the recording region in which the first image data is recorded coinciding with the recording region in which the second image data is recorded in the second recording medium, ending recording of the second image data after recording the second image data up to a terminal end of the coinciding recording region.

8. The imaging recording method according to claim 6 , comprising:

recording the second image data in each recording region in the first direction.

9. The imaging recording method according to claim 5 , comprising:

setting the writing start positions of the first image data and the second image data at the same position in the second recording medium.

10. The image recording apparatus according to claim 1 , wherein the file system controller sets the writing start positions of the first image data and the second image data at the same position in the second recording medium.

11. The image recording apparatus according to claim 1 , wherein the first and second recording media are selected from a group consisting of hard disk drives, solid state drives, and secure digital memory cards.

12. The image recording apparatus according to claim 1 , wherein the file system controller controls the cyclic recording of the first image data from a second terminal end of the second recording medium after recording the first image data up to a first terminal end of the second recording medium, and the cyclic recording of the second image data from the first terminal end of the second recording medium after recording the second image data up to the second terminal end of the second recording medium.

13. The image recording apparatus according to claim 2 , wherein the file system controller controls recording of the second image data in each recording region in the first direction.