In Read mode device reads block of data and transfers it thorough interface to the host controller.The program tests blocks one by one from minimum to maximum. The program measures operation time for each block. In Verify mode device reads block of data into drive's internal buffer only and checks for consistency, there is no data transfer through an interface connector/cable.Verify test may work in unreliable way on USB/Flash devices.Verify test may have restrictions on Block Size with 256, 16384 or 65536 sectors because of Windows limitations. Author wasn't able to get stable test results with two or more simultaneous tests.
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