When the Cache updates that are submitted by CPU that data may not be written into the Main Memory Write Cache policy dependent on the policy of the two Write is Write-through and Write-back.
When Cache adjusted the data to be written by the CPU may not be written into the Main Memory Write policy based on the Cache is located 2 Write policy is Write-through and Write-back.
When the value Cache was written by CPU information that may not be written down in the Main Memory depending on the Write policy. Cache. Write policy is 2 is Write-through, and Write-back.