• Date: January 7, 2022
• OS: macOS 10.9.5 or later
• License: Free

AmorphousDiskMark measures storage read/write performance in MB/s and IOPS.

• Sequential 1 MiB block read/write measurements with Queue Depth=1, 2, 4, 8, 16, 32, 64, 128, 256, 512, or 1024
• Sequential 1 MiB block read/write measurements
• Random sequence 4 KiB block read/write measurements with Queue Depth=1, 2, 4, 8, 16, 32, 64, 128, 256, 512, or 1024
• Random sequence 4 KiB block read/write measurements
• Read/write MB/s or IOPS scores in the main window
• Read/write MB/s and IOPS scores in tooltip
• Measurement data value: random or zero
• 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
• Measurement interval: 0 seconds, ..., 10 minutes

NOTE: Please do not repeat the read/write measurements unnecessarily. Repeating read/write measurements may shorten the lifespan of your storage device.

MB/s: megabytes per second: 1,000,000 bytes per second

IOPS: input/output operations per second

KiB: Kibibytes: 1,024 bytes

MiB: Mebibytes: 1,024 x 1,024 bytes: 1,048,576 bytes

GiB: Gibibytes: 1,024 x 1,024 x 1,024 bytes: 1,073,741,824 bytes

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Instructions:

• Choose the target volume from the volume selection popup button at the top right corner in the AmorphousDiskMark window.
• Click the “All” button.
• When the measurements are finished, press command - S to save a screenshot of the AmorphousDiskMark window.
• Write an Amazon review of your storage device, and attach the screenshot if you like.

A permission was given by the author of CrystalDiskMark to use the identical or similar user interface in this app. Blog by CrystalDiskMark author.