AmorphousDiskMark vs DiskMark

AmorphousDiskMark is a free, open-source macOS utility for measuring storage read and write performance. It reports scores in megabytes per second or IOPS, with both units available in result tooltips. Sequential measurements use 1 MiB blocks, while random measurements use 4 KiB blocks; either type can run at queue depths from 1 through 1024. You can select random or zero test data, choose test sizes from 16 MiB to 64 GiB, and set intervals from 0 seconds to 10 minutes. Results can be copied as plain text, and the app can save a screenshot of its window. The product page lists macOS 10.9.5 or later, and the App Store describes it as Mac-only. The maker says an internet connection is unnecessary after downloading. The GitHub repository identifies an MIT license. The listed plan is free. Repeating read/write measurements may shorten storage-device lifespan.

DiskMark is a Windows utility for benchmarking disks and hard drives. It lets users set advanced test options to assess drive performance and typical operating performance. The software is open source under the MIT License, and the maker says source code is available on GitHub and with version-specific releases. Its listed stable release is version 1.0.0.8, released on 2018-02-23; the release notes mention terminology changes and updated documentation. The release history runs from version 1.0.0.0 through 1.0.0.8. The latest listed release offers separate 32-bit and 64-bit Windows executables: DiskMark32.exe at 586.42 KB and DiskMark64.exe at 608.11 KB. The plan is free. The maker's site provides a Support section with a Contact link.