When you plug in a USB flash drive or other removable drive and specify you want to use it as a ReadyBoost device, Windows runs a quick performance test to see whether the drive meets the minimum standards If it fails, you’re greeted with a message that says “This device does not have the performance characteristics for use in speeding up your system.”
If you think the test is in error, click Test Again to get a second hearing If the drive fails several tests, look up the performance results for yourself Open Event Viewer (Eventvwr.msc) and click the Applications And Services Logs category in the console tree on the left Under this heading, click Microsoft, Windows, and ReadyBoost; under this heading, select Operational The log entries here include performance test results for both successful and unsuccessful attempts.
To be used as a ReadyBoost device, your fl ash drive has to pass several tests, including available free space, write performance, and random read performance If any of these tests fail, the drive is rejected.
