Why the result differ from other benchmark software? Select test data (Random, 0Fill, 1Fill).Measure random 512KB, 4KB, 4KB (Queue Depth=32) reads/writes speed.Crystal Disk Mark puts up a decent performance and it serves its purpose very well. Currently, the program allows us to measure sequential and random read/write speeds. Random write speeds are usually half of random read speeds.CrystalDiskMark is designed to quickly test the performance of your hard drives. Typical read speeds (MegaBytes per Second): Diskmark uses thousands of 8 KB files to test this performance - this is the lowest performance you should expect from your disk. These speeds are what you would expect when working with complex programs that deal with a lot of files. Sequential write speeds on flash devices are usually much slower. This is the best performance you should expect from your disk. These speeds are what you would expect when copying/moving large files. Newer technologies such as UASP are coming out often that squeeze out every last ounce of performance out of your external storage devices. The single most important thing you should do is ensure you are using USB 3.0 or USB 3.1 devices. Your external hard disks and flash drives might have multiple factors affecting their performance which should be monitored closely. Using DiskMark you can see if the performance deteriorates due to age or due to bloatware on your system. Most newer MacBooks and iMacs come with solid state hard drives which are incredibly fast atleast when running normally. ![]() Why should I benchmark the performance of my disks?
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