Is there a reason that Disk Speed Test will not test an SSD drive? It's rather strange, I have a mac mini with an SSD for the main drive and a secondary standard sata drive. When I run DST I get roughly 140 MB/s write and 165 MB/s read. I then select the SSD drive and it states that the drive is read only. I then test just the standard HHD and I get rough 65 MB/s for write and read. So, if the SSD can be tested what is being tested on the first run? It's can't be just the standard drive because that by itself is much slower.
Download Blackmagic Disk Speed Test for macOS 10.13.0 or later and enjoy it on your Mac. ‎Disk Speed Test is an easy to use tool to quickly measure and certify your disk performance for working with high quality video! Talk about the major differences between new and old version.
Blackmagic Disk Speed Test started as a free utility included with any of the Blackmagic Design video and audio products for multimedia capture, playback, and editing. The free app became popular with Mac enthusiasts as an easy way to check the performance of their system drives, fusion drives, and SSDs. Welcome to the Blackmagic Design support center. Here you will find the latest software updates, support notes, instruction manuals and all kinds of helpful information. If you need extra help, then please go to our community forum and connect with the incredible experience of the television industry. BlackMagic Disk Speed Test / Mac App TestOsx YosemiteFree Mac App Store.
thanks for the feedbackcurious