![]() A small gap (for the transfer of the videos suite from the primary drive to the RAM drive) is followed by three sets for the next data set. The first three sets of writes and reads correspond to the photos suite. The graphs below show the speeds observed during our real-world DAS suite processing. For supported drives, we also recorded the internal temperature of the drive during the process. In order to identify whether the drive under test suffers from this problem, we instrumented our robocopy DAS benchmark suite to record the flash drive's read and write transfer rates while the robocopy process took place in the background. This aspect is an important one, as the last thing that users want to see when copying over, say, 100 GB of data to the external, is the transfer rate going to USB 2.0 speeds. Aspects that may influence this include thermal throttling and firmware caps on access rates to avoid overheating or other similar scenarios. An interesting aspect of these types of DAS units is performance consistency.
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