WD_Black SN770M 2TB SSD Review

The ATTO Disk Benchmark performance measurement tool is compatible with Microsoft Windows. Measure your storage system performance with various transfer sizes and test lengths for reads and writes. Several options are available to customize your performance measurement including queue depth, overlapped I/O and even a comparison mode with the option to run continuously. Use ATTO Disk Benchmark to test any manufacturer's RAID controllers, storage controllers, host adapters, hard drives and SSD drives and notice that ATTO products will consistently provide the highest level of performance to your storage.

We are using version 4.0 for our NVMe disk tests.

WD rates the Sequential performance of the drive as up to 5,150MB/s and 4,850MB/s for read/writes respectively. With the ATTO benchmark, we couldn't quite hit the official maximums with test results of  4,830MB/s for reads and 4,520MB/s for writes.

The 2TB WD_Black SN770M's read performance starts to level off at the 256KB mark at 4,840MB/s and continues in the same manner till the end of the test. Write performance starts levelling off at 128KB (4,510MB/s) and carries on at more or less the same speed until the 8MB mark when it dips to 4,370MB/s. Incidentally, although the graph doesn't show it after the 8MB mark the drive recovers back up to 4,520MB/s and carries on around this speed until the end of the test run at 64MB I/O.

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