When I launch gnome-disks after clean boot on freshly installed Ubuntu MATE 16.04.1 and select Benchmark Disk with writing enabled, I'm getting Error unmounting filesystem error. Is this a normal behavior? Do I have to kill some default system processes manually in order to run write benchmark?

I tested this on i386 laptop and Raspberry Pi 3 with the same result.


Note: Tested on 14.04 and 16.04

This is normal. You can't unmount a filesystem that is in use. On top of that the gnome-disks write benchmark is destructive and even warns you to backup before using it as shown below:


Due to this you only want to write benchmark disks that don't have important data on them as it will be overwritten. I always boot from live media to benchmark disks with gnome-disks

For a safer benchmarking method see my answer using fio to a similar question here.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.