I own several notebooks (dell xps, xiaomi), some are dual boot and some are linux (ubuntu, latest kernel) only.
Each has m2 ssd drive or two, all drives are fast (970 samsung, 870 samsung, crucial p310, YMTC PC300-1TB-D) and can write at least at 2 Gb/s.
What I noticed is that independently of brand, capacity, hardware copy speed in ubuntu never goes above 1.5 Gb/s which is significantly less than drive's maximum performance.
On windows all drives can copy twice as fast. For example crucial p310 can easily achieve copy speed of 4-4.5Gb/s and I never get close to that in ubuntu.
KDiskMark shows numbers close to advertised by manufacturer but gnome files is unable to copy at that speed.
I tested barrier=0, tried ntfs with big_writes, nothing helps to go above 1.5gb/s.
So my question is what can be done?
