Therun-sequential-suite command measures read and write performance across a range of transfer sizes.
Running DiskTester run-sequential-suite
Using DiskTester.app, choose. Suitable defaults are chosen. You can exercise more control using the command line.
The summary output can be graphed using the supplied spreadsheet (see below). Copy and paste the summary output into the spreadsheet template.
Graph the results using the supplied spreadsheet.
The graph below is for the OWC Mercury Extreme SSD. These results are exceptional for a single drive of any kind.
The command line allows greater control. Please use disktester help run-sequential-suite for details on the available options.
run-sequential-suite [--iterations|-i <count>] "1" [--starting-xfer|-s <size[K|M|G|T]>] "32K" [--ending-xfer|-e <size[K|M|G|T]>] "256M" [--test-size|-t <size[K|M|G|T]|max>] "2G" [--test-area|-a <start|middle|end|xx%>] "start" <volume-name>
Various command line possibilities. The iteratations and test size can be used to reduce test time, so long as results are consistent.
disktester run-sequential-suite Scratch
disktester run-sequential-suite --iterations 3 Scratch
To fill a drive with a random stream (torture test for some solid state drives):
disktester run-sequential-suite --iterations 5 --test-size 4G Scratch
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