DiskSpd is a free and open-source[2] command-line tool for storage benchmarking on Microsoft Windows that generates a variety of requests against computer files, partitions or storage devices and presents collected statistics as text in the command-line interface or as an XML file.

[3][4][1] The command supports physical and virtual storage including hard disk drive (HDD), solid state devices (SSD), and solid state hybrid drives (SSHD).

[5] It provides control over the testing methods, duration, threads, queues, IO and processor affinity, and reporting.

[6] In 2024, the command was updated to handle modern workloads and hardware like NVMe.

[9] Benchmark two drives (C: and E:) using a 100 MB test file, and run the test for a duration of 60 seconds (the default is 10).