Blackmagic Disk Speed Test

Developer: Blackmagic Design Inc

Current Version: 3.1

Last Updated: 9 months ago

Download Size: 17.2 MB - Download


Disk Speed Test is an easy to use tool to quickly measure and certify your disk performance for working with high quality video! Simply click the start button and Disk Speed Test will write test your disk using large blocks of data, and then display the result. Disk Speed Test will continue to test writes and reads from your disk so you can evaluate both performance and readability over time.


Release Notes:

Improve support for faster disks.


Most Helpful Reviews

Version 2.2.2
Review by NothingToGain

For all those having the “Read Only” issue... - This excellent product works precisely as advertised. If, like BBurr55, you think it doesn’t function because you get a message saying your drive is "read only” and you need to pick a drive with Read/Write privileges, you might be forgiven for thinking that’s nonsense because, "I’ve been reading and writing to them both before and after the test.” You might be forgiven for thinking that, but you’d still be wrong. Mac example: Though you can read and write to your external drives, that’s because the computer knows you as Administrator (or “system"). Open the Finder and go to the external drive you want to test. If you have right-click enabled on your mouse, do that or go FIle>Get Info or Command+I . When the Info window opens you’ll see at the bottom that under Sharing & Permissions “system" and “wheel" are set to Read & Write, but “everyone" is set to Read only. This is by default to keep hackers and malware from writing to your drive. It sees the App, Blackmagic Disk Speed Test, as “everyone” To run the test click the lock in the lower right-hand corner of the Info Window and enter your password to unlock. Change “everyone" to Read & Write and then close the window. You can now run the speed test. You should change the settings back when finished for security. Great App, but judging by the complaints you might want to warn about this in advance. Thanks!

Found helpful by 35 out of 39 people
Version 2.2
Review by ronjamin

DOES NOT FIT WINDOW ON MACBOOK AIR 11in - The program uses non-standard windowing which makes it impossible to view the whole window on a MacBook Air 11in. Useless.

Found helpful by 38 out of 51 people

More Reviews for Current Version

Version 3.1
Review by SAP995

Doesn’t even open - The app will not even open.

Found helpful by 8 out of 9 people
Version 3.1
Review by fedecape

May 17 update is broken - Does not open.

Found helpful by 6 out of 6 people
Version 3.1
Review by Vsg24

Doesn’t start - It just doesn’t work on the latest macOS.

Found helpful by 5 out of 6 people
Version 3.1
Review by

Nice FREE Utility - I use this often and appreciate it. The update (3.1) seems to provide much more stable speed readings than the 2.x version I've been using (where the guage is all over the map). One issue I have is that it seems to have issues with NTFS formatted drives. I'm using Paragon's NTFS for Mac, and BMDST writes to it well (430 to my SSD) but on the read test it often (though not always) fails with "Error reading the test file". Aside from this niche case it's an awesome tool.

Found helpful by 5 out of 5 people
Version 3.1
Review by rebelsqk

Works well! An is free... - I had no problems of any type installing an using on two hard drives. Both running Sierra. It quickly told me how much faster a new SSD drive was over my old drive. That is really all I wanted to know today. Yes an SSD is a lot faster. 5 times faster using a PCI adapter card an 2.5 times faster plugged into a drive bay. 2010 Mac pro.

Found helpful by 4 out of 4 people