BUT: if I first connect a USB3 hub to the USB-A socket, and connect the disk to the hub, then I can use it: 23:04:32 susi kernel: usb 4-2: new SuperSpeed USB device number 7 using xhci_hcd 23:04:32 susi kernel: usb 4-2: New USB device found, idVendor=2109, idProduct=0812, bcdDevice= b.e1 23:04:32 susi kernel: usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 23:04:32 susi kernel: usb 4-2: Product: USB3.0 Hub 23:04:32 susi kernel: usb 4-2: Manufacturer: VIA Labs, Inc. 23:04:32 susi kernel: hub 4-2:1.0: USB hub found 23:04:32 susi kernel: hub 4-2:1.0: 4 ports detected 23:04:32 susi kernel: usb 3-2: new high-speed USB device number 4 using xhci_hcd 23:04:32 susi kernel: usb 3-2: New USB device found, idVendor=2109, idProduct=2812, bcdDevice= b.e0 23:04:32 susi kernel: usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 23:04:32 susi kernel: usb 3-2: Product: USB2.0 Hub 23:04:32 susi kernel: usb 3-2: Manufacturer: VIA Labs, Inc. 23:04:32 susi kernel: hub 3-2:1.0: USB hub found 23:04:32 susi kernel: hub 3-2:1.0: 4 ports detected 23:04:33 susi kernel: usb 4-2.3: new SuperSpeed USB device number 8 using xhci_hcd 23:04:33 susi kernel: usb 4-2.3: New USB device found, idVendor=0bda, idProduct=8153, bcdDevice=30.00 23:04:33 susi kernel: usb 4-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=6 23:04:33 susi kernel: usb 4-2.3: Product: USB 10/100/1000 LAN 23:04:33 susi kernel: usb 4-2.3: Manufacturer: Realtek 23:04:33 susi kernel: usb 4-2.3: SerialNumber: 000002000000 23:04:34 susi kernel: usb 4-2.3: reset SuperSpeed USB device number 8 using xhci_hcd 23:04:34 susi upowerd[1707]: treating change event as add on /sys/devices/pci0000:00/0000:00:08.1/0000:04:00.4/usb4/4-2 23:04:34 susi upowerd[1707]: treating change event as add on /sys/devices/pci0000:00/0000:00:08.1/0000:04:00.4/usb3/3-2 23:04:34 susi upowerd[1707]: treating change event as add on /sys/devices/pci0000:00/0000:00:08.1/0000:04:00.4/usb4/4-2/4-2.3 23:04:34 susi upowerd[1707]: treating change event as add on /sys/devices/pci0000:00/0000:00:08.1/0000:04:00.4/usb4/4-2/4-2.3 23:04:34 susi upowerd[1707]: treating change event as add on /sys/devices/pci0000:00/0000:00:08.1/0000:04:00.4/usb4/4-2/4-2.3 23:04:34 susi upowerd[1707]: treating change event as add on /sys/devices/pci0000:00/0000:00:08.1/0000:04:00.4/usb4/4-2/4-2.3 23:04:34 susi upowerd[1707]: treating change event as add on /sys/devices/pci0000:00/0000:00:08.1/0000:04:00.4/usb4/4-2/4-2.3 23:04:41 susi kernel: usb 4-2.2: new SuperSpeed USB device number 9 using xhci_hcd 23:04:41 susi kernel: usb 4-2.2: New USB device found, idVendor=174c, idProduct=55aa, bcdDevice= 1.00 23:04:41 susi kernel: usb 4-2.2: New USB device strings: Mfr=2, Product=3, SerialNumber=1 23:04:41 susi kernel: usb 4-2.2: Product: ASM105x 23:04:41 susi kernel: usb 4-2.2: Manufacturer: ASMT 23:04:41 susi kernel: usb 4-2.2: SerialNumber: ACDFD0000000000007B4 23:04:41 susi kernel: scsi host0: uas 23:04:41 susi kernel: scsi 0:0:0:0: Direct-Access ASMT 2115 0 PQ: 0 ANSI: 6 23:04:41 susi kernel: sd 0:0:0:0: Attached scsi generic sg0 type 0 23:04:41 susi kernel: sd 0:0:0:0: [sda] 937721856 512-byte logical blocks: (480 GB/447 GiB) 23:04:41 susi kernel: sd 0:0:0:0: [sda] Write Protect is off 23:04:41 susi kernel: sd 0:0:0:0: [sda] Mode Sense: 43 00 00 00 23:04:41 susi kernel: sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA 23:04:41 susi kernel: sd 0:0:0:0: [sda] Optimal transfer size 33553920 bytes 23:04:41 susi kernel: sda: sda1 23:04:41 susi kernel: sd 0:0:0:0: [sda] Attached SCSI disk micha@susi:~> sudo fdisk -l /dev/sda Disk /dev/sda: 447.14 GiB, 480113590272 bytes, 937721856 sectors Disk model: 2115 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 33553920 bytes Disklabel type: dos Disk identifier: 0x2606303b Device Boot Start End Sectors Size Id Type /dev/sda1 2048 937721855 937719808 447.1G 83 Linux :~> mount |grep sda /dev/sda1 on /mnt type xfs (rw,relatime,attr2,inode64,logbufs=8,logbsize=32k,noquota) :~> sudo dd if=/dev/sda of=/dev/null status=progress 2323831808 bytes (2.3 GB, 2.2 GiB) copied, 10 s, 232 MB/s^C 4651175+0 records in 4651174+0 records out 2381401088 bytes (2.4 GB, 2.2 GiB) copied, 10.2518 s, 232 MB/s