Hi, coming from https://lore.kernel.org/all/20200818041324.GA3173@Susan/ as I understand UAS was working for JMicron JMS567 in the past, then was disabled in the kernel, now using usb-storage. Why? The hardware should support UAS and does so on Windows. Before 5.4 it was working with UAS on Linux as well. I purchased a 5-bay USB enclosure "ORICO DS500U3" but UAS is not working: 4-5 152d:0567 00 1IF [USB 3.00, 5000 Mbps, 8mA] (JMicron External USB 3.0 20170331000C3) |__ Port 5: Dev 8, If 0, Class=Mass Storage, Driver=usb-storage, 5000M Aug 28 18:47:09 [kernel] usb 4-5: new SuperSpeed USB device number 8 using xhci_hcd Aug 28 18:47:09 [kernel] usb 4-5: New USB device found, idVendor=152d, idProduct=0567, bcdDevice=52.03 Aug 28 18:47:09 [kernel] usb 4-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Aug 28 18:47:09 [kernel] usb 4-5: Product: External USB 3.0 Aug 28 18:47:09 [kernel] usb 4-5: Manufacturer: JMicron Aug 28 18:47:09 [kernel] usb 4-5: SerialNumber: 20170220000C3 Aug 28 18:47:09 [kernel] usb-storage 4-5:1.0: USB Mass Storage device detected Aug 28 18:47:09 [kernel] usb-storage 4-5:1.0: Quirks match for vid 152d pid 0567: 5000000 Aug 28 18:47:09 [kernel] scsi host8: usb-storage 4-5:1.0 Aug 28 18:47:09 [mtp-probe] checking bus 4, device 8: "/sys/devices/pci0000:00/0000:00:14.0/usb4/4-5" Aug 28 18:47:09 [mtp-probe] bus: 4, device: 8 was not an MTP device With a mdraid raid0 and 5x1TB discs I get only about 72MiB/s to the raid0 which is really slow. UAS could do more. Is there any chance UAS could get fixed for that device in the future? At least is seems to have worked someday with older kernels? Best regards, Massimo
