![]() Let's retire BlackMagic's Disk Mark and embrance Amorphous Disk. There's plenty of aspects that aren't covered, such as latency, burst performance, power consumed, and mixed random read/writes, but this is a massive step in the right direction for gauging SSD performance on macOS. Also, CrystalDiskMark measures IOPS (Input/Output Operations-per-second), which is similar but also a different measure of disk speed. Usually, an OS wouldn't have that deep of a queue, but the Q1T1 does mimic a singular request. CrystalDiskMark This is a freeware utility that is used to check hard disk performance. The default depth is pretty high for the test. To use this Speed tester to test hard drive speed, follow these simple steps: Download the app Run the up, select the drive and choose one of the three modes that you would like to use in order to speed test the hard drive. Click Start to begin testing the hard drive or SSD read and write speed with the hard disk/SSD speed test tool for Windows 10/8/7. CrystalDiskMark tests random reads and writes both as queued requests and single requests. When first run, Blackmagic Disk Speed Test writes a big block of data to the selected drive, testing the write speed, then reads it back and reports the results. Random Read and Write tests are as important, if not more so, as many SSDs can deliver fast maximum continuous read and writes but much less so for random small data blocks. This is useful but only measures one aspect of an SSD, and doesn't necessarily mimic accurately how most disk interactions occur. So why am I always complaining about BlackMagic Disk Speed TestīlackMagic's Disk Speed Test only tests one thing, continuous throughput. ![]() While it isn't a direct port, it's heavily inspired by the famed and loved Windows utility, CrystalDiskMark. The first commenter on FaceBook pointed out that we finally have a good disk benchmark utility AmorphousDiskMark. ![]() Awhile back, I made a video about USBc and the classic Mac Pro but lamented yet ago the terrible benchmarking on macOS. ![]()
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