AmorphousDiskMark for macOS - measures storage read/write performance

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AmorphousDiskMark 4.0

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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.

MB/s score image

IOPS score image

volume selection popup button menu item tooltip

MB/s and IOPS measurement result tooltip

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AmorphousDiskMark 3.0 (C) 2016-2020 Katsura Shareware
                    Katsura Shareware : https://katsurashareware.com/
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* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1,000 bytes, KiB = 1,024 bytes
* MB = 1,000,000 bytes, MiB = 1,048,576 bytes

  Sequential Read 1MiB (QD=   8) :   832.04 MB/s [    793.5 IOPS]
 Sequential Write 1MiB (QD=   8) :   773.81 MB/s [    738.0 IOPS]
     Sequential Read 1MiB (QD=1) :   667.96 MB/s [    637.0 IOPS]
    Sequential Write 1MiB (QD=1) :   576.30 MB/s [    549.6 IOPS]
      Random Read 4KiB (QD=  64) :   524.28 MB/s [ 127998.7 IOPS]
     Random Write 4KiB (QD=  64) :   192.25 MB/s [  46935.0 IOPS]
         Random Read 4KiB (QD=1) :    31.70 MB/s [   7738.3 IOPS]
        Random Write 4KiB (QD=1) :   200.17 MB/s [  48868.8 IOPS]

    Test : 1 GiB (x5) [Interval=5 sec]
  Volume : Macintosh HD: 37% used (21/58 GiB)
  Device : APPLE SSD SM0512F
     CPU : Intel Core i7-4870HQ
    Date : 2020-09-21T02:34:50Z
      OS : macOS 10.15.6 19G2021

You can also copy/paste the measurements as plain text.