AmorphousDiskMark measures storage read/write performance in MB/s and IOPS. 
<ul> 
	<li>Sequential 1 MiB block read/write measurements with Queue Depth=1, 2, 4, 8, 16, 32, 64, 128, 256, 512, or 1024</li> 
	<li>Random sequence 4 KiB block read/write measurements with Queue</li> 
	<li>Depth=1, 2, 4, 8, 16, 32, 64, 128, 256, 512, or 1024</li> 
	<li>Sequential 1 MiB block read/write measurements</li> 
	<li>Random sequence 4 KiB block read/write measurements</li> 
	<li>Read/write MB/s or IOPS scores in the main window</li> 
	<li>Read/write MB/s and IOPS scores in the tooltip</li> 
	<li>Measurement data value: random or zero</li> 
	<li>Measurement size: 16 MiB, 32 MiB, 64 MiB, 128 MiB, 256 MiB, 512 MiB, 1 GiB, 2 GiB, 4 GiB, 8 GiB, 16 GiB, 32 GiB, or 64 GiB</li> 
	<li>Measurement interval: 0 seconds, ..., 10 minutes</li> 
	<li>Measurement duration limit: none, 5 seconds, ..., 1 minute.</li> 
</ul> 

A permission was given by the author of CrystalDiskMark to use an identical or similar user interface in this app.

Katsura Shareware

Absolutely Free

AmorphousDiskMark

Measures storage read/write performance in MB/s and IOPS.

amorphousdiskmark

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AmorphousDiskMark: 1.2.3