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TR RoboBench — Real-world transfers
RoboBench trades synthetic tests for real-world transfers with a range of file types. Developed by our in-house coder, Bruno "morphine" Ferreira, this benchmark relies on the multi-threaded robocopy command build into Windows. We copy files to and from a wicked-fast RAM disk to measure read and write performance. We also cut the RAM disk out of the loop for a copy test that transfers the files to a different location on the SSD.

Robocopy uses eight threads by default, and we've also run it with a single thread. Our results are split between two file sets, whose vital statistics are detailed below. The compressibility percentage is based on the size of the file set after it's been crunched by 7-Zip.

  Number of files Average file size Total size Compressibility
Media 618 6.4MB 3.94GB 1.35%
Work 35,184 33.0KB 1.16GB 76.24%

The "media" set is made up of movie files, MP3s, and high-resolution images. There are only a few hundred files in total, and the data set isn't amenable to compression. The "work" set comprises loads of productivity-type files, including documents, spreadsheets, and web-optimized images. It also includes a stack of programming-related files, including the files for the Visual Studio test on the next page. The average file size is measured in kilobytes rather than megabytes, and the files are mostly compressible.

RoboBench's write and copy tests run after the drives have been put into a simulated used state with 30 minutes of 4KB random writes. The pre-conditioning process is scripted, as is the rest of the test, ensuring that drives have the same amount of time to recover.

Read speeds are up first. Click the buttons below the graphs to switch between one and eight threads.

The results here are much closer together than in the synthetics. The differences are especially small in the eight-thread test. Nonetheless, the Arc 100 manages to come out on top yet again.

Write speeds are a similarly close call. The Fury is a little slower in the eight-thread media test, but it stays right on track with the others in the work tests.

The copy results resemble the write results. The Fury lags behind in the media test but barely trails otherwise.