我有两个 Transcend USB 驱动器外壳。购买时（2019 年），它们一直运行良好，里面有不同的磁盘（HDD、SSD）。但在某些时候，可能是在系统更新后，它们完全停止工作，甚至没有安装。我目前在 Dell XPS 9570 上使用 Kubuntu 20.04。驱动器在消息：
[111851.908755] usb 2-1: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[111851.957345] usb 2-1: New USB device found, idVendor=8564, idProduct=7000, bcdDevice=80.00
[111851.957351] usb 2-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[111851.957355] usb 2-1: Product: StoreJet Transcend
[111851.957358] usb 2-1: Manufacturer: StoreJet Transcend
[111851.957360] usb 2-1: SerialNumber: WL1J5AXN
[111852.008854] usbcore: registered new interface driver usb-storage
[112321.441847] usb 2-1: USB disconnect, device number 2
[112351.943134] usb 2-2: new SuperSpeed Gen 1 USB device number 3 using xhci_hcd
[112351.991510] usb 2-2: New USB device found, idVendor=8564, idProduct=7000, bcdDevice=80.00
[112351.991516] usb 2-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[112351.991519] usb 2-2: Product: StoreJet Transcend
[112351.991522] usb 2-2: Manufacturer: StoreJet Transcend
[112351.991525] usb 2-2: SerialNumber: WL1J5AXN
以及系统盘：
Bus 002 Device 003: ID 8564:7000 Transcend Information, Inc. StoreJet Transcend
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 27c6:5395 Shenzhen Goodix Technology Co.,Ltd. Fingerprint Reader
Bus 001 Device 002: ID 0cf3:e301 Qualcomm Atheros Communications
Bus 001 Device 004: ID 0c45:671d Microdia Integrated_Webcam_HD
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
但不是在磁盘管理：
Disk /dev/nvme0n1: 465,78 GiB, 500107862016 bytes, 976773168 sectors
Disk model: Samsung SSD 970 EVO Plus 500GB
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: E856D149-62E7-4FB3-ABA9-69D13C8600A2
Device Start End Sectors Size Type
/dev/nvme0n1p1 2048 1050623 1048576 512M EFI System
/dev/nvme0n1p2 1050624 976773119 975722496 465,3G Linux filesystem
GPT PMBR size mismatch (1953525151 != 1953525167) will be corrected by write.
The backup GPT table is not on the end of the device. This problem will be corrected by write.
Disk /dev/sda: 931,53 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: Samsung SSD 860
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 0825A324-D2CE-4466-8664-65C9CF9A13B7
Device Start End Sectors Size Type
/dev/sda1 2048 1953519615 1953517568 931,5G Linux filesystem
上面的输出显示了我的两个内部 SSD，但没有显示 Transcend 外壳中的外部 HDD。为了清楚起见，省略了“循环”设备。
我尝试了其他地方建议的所有可能的解决方案，但没有任何帮助......
编辑1
sudo ls -l /dev/sdb
ls: cannot access '/dev/sdb': No such file or directory
编辑2
根据@sudodus 的建议，我尝试从全新的 Kubuntu 20.04 live USB 驱动器启动，外部驱动器实际上在那里可见！除了从头开始安装所有内容外，我仍然没有找到任何方法让它在我的主系统上运行