Hello, I own a WD Blue 1TB hard drive that I use in combination with an Icy Box IB-273StU3-B enclosure in order to plug it to my laptop using USB. It worked fine with all the Linux versions I tried, up until 5.4.17. Using Linux 5.3 --------------- Everything works as expected when I plug the drive, and I can mount the partitions: # dmesg -T [Sun Mar 22 23:48:39 2020] usb 2-2: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd [Sun Mar 22 23:48:39 2020] usb 2-2: New USB device found, idVendor=357d, idProduct=7788, bcdDevice= 1.14 [Sun Mar 22 23:48:39 2020] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Sun Mar 22 23:48:39 2020] usb 2-2: Product: USB to ATA/ATAPI Bridge [Sun Mar 22 23:48:39 2020] usb 2-2: Manufacturer: JMicron [Sun Mar 22 23:48:39 2020] usb 2-2: SerialNumber: 74D7851513309E5 [Sun Mar 22 23:48:39 2020] usbcore: registered new interface driver usb-storage [Sun Mar 22 23:48:39 2020] scsi host6: uas [Sun Mar 22 23:48:39 2020] usbcore: registered new interface driver uas [Sun Mar 22 23:48:39 2020] scsi 6:0:0:0: Direct-Access WDC WD10 JPVT-00A1YT0 0114 PQ: 0 ANSI: 6 [Sun Mar 22 23:48:39 2020] sd 6:0:0:0: Attached scsi generic sg1 type 0 [Sun Mar 22 23:48:39 2020] sd 6:0:0:0: [sdb] Spinning up disk... [Sun Mar 22 23:48:40 2020] ..ready [Sun Mar 22 23:48:41 2020] sd 6:0:0:0: [sdb] 1953525168 512-byte logical blocks: (1.00 TB/932 GiB) [Sun Mar 22 23:48:41 2020] sd 6:0:0:0: [sdb] 4096-byte physical blocks [Sun Mar 22 23:48:41 2020] sd 6:0:0:0: [sdb] Write Protect is off [Sun Mar 22 23:48:41 2020] sd 6:0:0:0: [sdb] Mode Sense: 53 00 10 08 [Sun Mar 22 23:48:41 2020] sd 6:0:0:0: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FUA [Sun Mar 22 23:48:41 2020] sd 6:0:0:0: [sdb] Optimal transfer size 33553920 bytes not a multiple of physical block size (4096 bytes) [Sun Mar 22 23:48:41 2020] sdb: sdb1 [Sun Mar 22 23:48:41 2020] sd 6:0:0:0: [sdb] Attached SCSI disk Using Linux 5.4 --------------- # uname -a Linux Susan 5.4.0-4-amd64 #1 SMP Debian 5.4.19-1 (2020-02-13) x86_64 GNU/Linux # mkdir /tmp/mnt # mount /dev/sdb1 /tmp/mnt mount: /tmp/mnt: can't read superblock on /dev/sdb1. # fsck -y /dev/sdb1 fsck from util-linux 2.34 e2fsck 1.45.6 (20-Mar-2020) /dev/sdb1: clean, 2951657/61054976 files, 115035523/244190208 blocks # dmesg -T [Mon Mar 23 18:43:06 2020] usb 3-2: new SuperSpeed Gen 1 USB device number 8 using xhci_hcd [Mon Mar 23 18:43:06 2020] usb 3-2: New USB device found, idVendor=357d, idProduct=7788, bcdDevice= 1.14 [Mon Mar 23 18:43:06 2020] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Mon Mar 23 18:43:06 2020] usb 3-2: Product: USB to ATA/ATAPI Bridge [Mon Mar 23 18:43:06 2020] usb 3-2: Manufacturer: JMicron [Mon Mar 23 18:43:06 2020] usb 3-2: SerialNumber: 74D7851513309E5 [Mon Mar 23 18:43:06 2020] usb 3-2: UAS is blacklisted for this device, using usb-storage instead [Mon Mar 23 18:43:06 2020] usb-storage 3-2:1.0: USB Mass Storage device detected [Mon Mar 23 18:43:06 2020] usb-storage 3-2:1.0: Quirks match for vid 357d pid 7788: 4800000 [Mon Mar 23 18:43:06 2020] scsi host6: usb-storage 3-2:1.0 [Mon Mar 23 18:43:07 2020] scsi 6:0:0:0: Direct-Access WDC WD10 JPVT-00A1YT0 0114 PQ: 0 ANSI: 6 [Mon Mar 23 18:43:07 2020] sd 6:0:0:0: Attached scsi generic sg1 type 0 [Mon Mar 23 18:43:07 2020] sd 6:0:0:0: [sdb] Spinning up disk... [Mon Mar 23 18:43:08 2020] ..ready [Mon Mar 23 18:43:09 2020] sd 6:0:0:0: [sdb] 1953525168 512-byte logical blocks: (1.00 TB/932 GiB) [Mon Mar 23 18:43:09 2020] sd 6:0:0:0: [sdb] Write Protect is off [Mon Mar 23 18:43:09 2020] sd 6:0:0:0: [sdb] Mode Sense: 47 00 10 08 [Mon Mar 23 18:43:09 2020] sd 6:0:0:0: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FUA [Mon Mar 23 18:43:09 2020] sdb: sdb1 [Mon Mar 23 18:43:09 2020] sd 6:0:0:0: [sdb] Attached SCSI disk [Mon Mar 23 18:43:30 2020] sd 6:0:0:0: [sdb] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Mon Mar 23 18:43:30 2020] sd 6:0:0:0: [sdb] tag#0 Sense Key : Illegal Request [current] [Mon Mar 23 18:43:30 2020] sd 6:0:0:0: [sdb] tag#0 Add. Sense: Invalid field in cdb [Mon Mar 23 18:43:30 2020] sd 6:0:0:0: [sdb] tag#0 CDB: Write(10) 2a 08 00 00 08 00 00 00 08 00 [Mon Mar 23 18:43:30 2020] blk_update_request: critical target error, dev sdb, sector 2048 op 0x1:(WRITE) flags 0x20800 phys_seg 1 prio class 0 [Mon Mar 23 18:43:30 2020] Buffer I/O error on dev sdb1, logical block 0, lost sync page write [Mon Mar 23 18:43:30 2020] EXT4-fs (sdb1): I/O error while writing superblock [Mon Mar 23 18:43:30 2020] EXT4-fs (sdb1): mount failed # lsusb Bus 003 Device 008: ID 357d:7788 Sharkoon QuickPort XT Other considerations -------------------- This enclosure works as expected with another drive: I tried with an old Fujitsu 250GB drive and was able to mount the partitions. The WD drive works with a similar enclosure: the Icy Box IB-268U3-B enclosure. It has the exact same vendor id and product id (357d:7788) but a different bcdDevice (2.03). Looking at the dmesg logs I pasted above, I see that the main difference is the driver used: - uas in Linux 5.3; - usb-storage in Linux 5.4, since uas is blacklisted. I believe the uas driver was blacklisted because of an old bug[1] in Fedora. In Linux, the commit that disabled uas is bc3bdb12bbb3492067c8719011576370e959a2e6. I do not really mind not being able to use uas, however I would like to be able to mount my partitions using usb-storage. Regards, Cyril Roelandt [1] https://bugzilla.redhat.com/show_bug.cgi?id=1260207