| 摘要 |
PURPOSE:To shorten the time required for recovery of a trouble of an access controller by providing the 1st and 2nd lock information memory means to an information processor and an access controller respectively. CONSTITUTION:When a controller 4 has a trouble, the state information corresponding to the commands delivered to the controller 4 from hosts 1 and 2 are all lost. When the trouble of the controller 4 is recovered, the lock information blocks registered on control table parts 103 and 203 of both hosts are checked by the recovery tasks 104 and 204 of the hosts 1 and 2. Then the block of a file where the discriminating information shows a state under locking is selected. A lock request command to be given to the selected block is delivered to the controller 4. The macroprocessing parts 102 and 202 deliver again the lock request commands or lock releast commands to complete the recovery processing. |
