| 摘要 |
PURPOSE:To enable to change the starting position of the following writing instruction to the position set before the issue of a command, by keeping a command ordering to transfer the information of the start sector position of the next writing command to a software from a rotary storage device. CONSTITUTION:Each sector includes an ID part 10 which specifies a sector, a BAD flag 12 which shows a defective sector, an ALT flag 13 which shows a replacing sector, a control field 14 including a pointer 15 which shows the starting point of the replacing sector, and data 11. The information is written following a certain number of sectors on the basis of a writing command. Then this information is checked, and a replacing sector is set for a defective sector. Then the information is written in succession to a certain number of new sectors after a replacing sector. This procedure is repeated. At the same time, a sector number is indicated for the writing start position which is led by the number of replacing sectors set to the sector to which the writing is first carried out and to a storage device. Then a writing command is delivered. |
