Summary: "Properly" testing the speed of a Fusion Drive is very, very hard, and you won't find any benchmarking software that can do it. On the main panel, users can view their drive information in one place, including the speed, temperature, errors, and other health estimates. The software tool helps monitor SSD health, notifying of firmware updates and predicting the time the drive fails. But both are totally meaningless because they don't test real usage. With CrystalDiskInfo, users can quickly test SSD speed. Other speed test software manages to use the hard drive and nothing else and gives a lot slower results. With your numbers, it's clear that the speed test never even touches the hard drive.
With a benchmark that runs forever, it can't do that so it looks slower than in real life. It also does work when you are not actually using your computer, so it can _seem_ to run fast while you are using the drive heavily, and then does a lot more work behind your back when you have your cup of coffee. Fusion Drive tries to do as much work as possible with the SSD drive while using the hard drive as a cheap place to store tons of data that you rarely use.Īs a result, a Fusion Drive is fast when the SSD drive is used, and slow when you access data that has ended up on the hard drive because it was rarely used.
You have a combination of 128 GB SSD and one TB hard drive. Very important to realise that your Fusion Drive isn't designed to get high benchmark scores, but to work fast in real life usage.
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