Hi I’m having problems getting usb 3.1 device to work.
System Opensuse 13.2 x64 Gigabyte 970 A-UD3 AMD3+ with on board usb 3.0 + generic usb 3.0 add-on card in pcie x1 slot and Vantec usb 3.1 add-on card in pcie x4 slot compatible with linux kernel 3.6 and up. AMD processes FX8120 8 core 16 gig’s DDR 3 ram video Radon R7-240 with 4 gig’s of ram. OS is on Kingston 128 gig sata 3 ssd Btrfs Home is on WD 1TB sata 3 HD XFS. I have upgraded to Kernel 4.1.1
I have two external HD’s one is Seagate expiation disk usb 3.0 3TB sata 3 the other is a Vantec usb 3.1 4TB sata 3.
I have been testing write speeds with a 55gig vdi file the Seagate usb 3.0 drive writes at 32 Mib/s consistently on usb 3.0 port both on board and add-on card and writes at 105 MiB/s on usb 3.1 card.
The Vantec usb 3.1 drive writes at 26 MiB/s on the usb 3.0 ports and writes at the same 105 MiB/s on the 3.1 ports but stalls out for 10 to 15 seconds at a time making overall write time 1 to 2 minutes slower than the Seagate drive. The reason I upgraded the kernel is on the 3.16 kernel the Vantec was causing system freezes and some times kernel panics witch so far have not happened on 4.1.1