| 摘要 |
PURPOSE:To elevate a utilization efficiency of an auxiliary memory device medium by using a area for extension log-out as a basic log-out area according to necessity. CONSTITUTION:A flag 15 displays whether the extension log-out area corresponding to the extension logging index to which belongs the flag may be used as the basic log-out area. When informed that the basic log-out area 3a is full, a service processor executing the basic log-out checks the flag 15 for indices 11a-12a for the extension log-out. When the flag 1, that is, when the corresponding extension log-out area can be used as the basic log-out area, the corresponding index is produced and the log-out data are stored in the prescribed extension log-out area. |
