is an area of temporary volatile storage (RAM) on the that has a faster access time than the disk drive media. If you use cache memory, you can increase overall I/O performance because of these reasons:
To measure the effectiveness of the cache, look at the hit percentage in the Performance Monitor. This value shows the percentage of data requests that are serviced by the cache and did not require a disk access.
Select Storage Subsystem >> Change >> Cache Settings to specify these values for all in the :
When the cache holds the specified start percentage of unwritten data, a flush is triggered. When the cache flushes down to the specified stop percentage, the flush is stopped. For example, you can specify that the controller start flushing the cache when the cache reaches 80 percent full. You also can specify that the controller stop flushing the cache when the cache reaches 16 percent full.
Select Logical Drive >> Change >> Cache Settings to enable or set these items: