CrystalDiskMark is a useful benchmark to measure theoretical performance levels of hard drives and SSD’s. We are using V3.0.3.

The Phison PS5007-E7 controller has a marked preference for highly compressible data as can be seen by the two benchmark result screens. Sequential read/writes and 4K/512K data reads at shallow depths get a healthy kick up in performance when the drive is tested with the highly compressible data test of CrystalDiskMark.
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