I too am plagued by ultra slow USB3 performance.
I have a 1 year old laptop with usb3 ports. I bought a usb3 flash drive. Several actually. All get the same problem - TOO SLOW.
During one install, I briefly saw some sort of error.
Said something 'called for 80 (something), falling back to default 64 (something)'.
I assume the 80 (something) is meant for USB 3.0 and the 64 (something) is meant for USB 2.0.
It can explain a LOT if this is the case.
If you blink for even an instant you can miss the error.
To recreate this, plug in a usb3 flash drive into the usb3 port.
Install Mint 13 (or 15) from a disk.
If you are lucky you might see the message. Don't blink!
I want to find out where that 64 (something) is in linux and edit it to force it to use the 80 (something).
I can start out around 60+ Mb/s and drop to as low as UNDER 1Mb/s when copying a movie to the flash drive.
Reads aren't that much better.
Also, I noticed that for some reason when copying large files to a flash drive it consumes massive amounts of memory. So much so that it drags the system down to the point that the mouse won't move sometimes.
The long delay after copying is a cache flush.
VERY annoying.
You cannot multitask and effectively get any kind of good speed when copying to a flash drive.
>small< files seem to work ok, but nothing appreciable.
I tried the same experiment on the wife's Win7 laptop. Hers FLIES!
Perhaps the developers can force the default to be the 80 (something) instead of the 64 (something)?
It might slow down USB2.0 stuff in favor of getting the speed ratings for USB3.
Flash drives are cheap now so those using 2.0 can simply buy a usb 3.0 drive.
Anyone know if there is a speed difference between the file systems on a flash drive?
ext2,3,4,xfs, etc vs fat, fat32, ExFat, NTFS ?
For me I am stuck using NTFS for all my compatibility needs
A suggestion for the developers - add ExFat compatibility in all future distros. Makes life easier.
I vaguely remember seeing something about microframes, but unsure.
Side note:
I tried Open SuSe and USB seems MUCH faster than Mint. Don't like SuSe. Just did it for and experiment.