| 摘要 |
PURPOSE:To access data in a faulty drive by providing a circuit which writes data, which should be written in the faulty drive,-in an alternative drive and writes data in normal drives on a board at the time when data write to the alternative drive is possible after substitution with the alternative drive of the faulty drive. CONSTITUTION:If a fault occurs in any drive mounted on a drive board 5A, the faulty drive is not separated from the drive board 5A left connected to a mother board, but the drive board 5A is separated from the mother board with normal drives mounted. After the faulty drive is substituted with a normal alternative drive, the drive board 5A is connected to the mother board again. A logical group 9 is the fault recovery unit, and drives in the logical group 9 hold an error correction data group which consists or m-1 data ana generated parity data. |
