| 摘要 |
PROBLEM TO BE SOLVED: To suppress time required for storage from being over a prolonged period when object data and backup data for this object data are stored.SOLUTION: A plurality of pieces of main data MD are created by dividing user data UD into every 512B (step 20) when a writing request occurs for the user data UD (step 10). The plurality of pieces of main data MD are copied and a plurality of pieces of backup data BD are created (step 40) when a writing object for the user data UD is in a first partition P1 in an HDD3 (Yes in step 30). The main data MD obtained in the step 20 and the backup data BD obtained in the step 40 are rearranged, write data WD is created (step 50) for writing to HDD3 and outputted to HDD3 (step 60). |
