The second interesting comparison is between the My Passport and the LaCie Porsche Design Mobile Drive. HDD-Based Direct-Attached Storage Benchmarks - CrystalDiskMark While the 1 MB sequential access traces show the 7200 RPM drive in better light, the use of a bridge chip supporting UASP helps the 5400 RPM My Book pull ahead by a huge margin in the high queue-depth sequential access trace. The first interesting comparison in the table below is between the My Book with the 5400 RPM HelioSeal drive and the G-Technology G-Drive with Thunderbolt over USB 3.0 that employs a 7200 RPM HelioSeal drive. The plain '4K' ones are similar to the '4K Q32T1' except that only a single queue and single thread are used. The plain 'Seq' traces use a 1MiB block size. The 'Seq Q32T1' sequential traces use 128K block size with a queue depth of 32 from a single thread, while the '4K Q32T1' ones do random 4K accesses with the same queue and thread configurations. Internally, CrystalDiskMark uses the Microsoft DiskSpd storage testing tool. Two of the traces are sequential accesses, while two are 4K rando accesses. Real-world performance testing is done with our custom test suite involving robocopy bencharks and PCMark 8's storage bench.ĬrystalDiskMark uses four different access traces for reads and writes over a configurable region size.
CrystalDiskMark is used for a quick performance overview. Our evaluation routine for hard-drive based direct-attached storage devices borrows heavily from the testing methodology for flash-based direct-attached storage devices.
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