The same problem here. External TOURO Mobile 1TB disconnects and
reconnects all the time. Dualbooting and using it in windows works fine.
[12450.661272] usb 4-2: USB disconnect, device number 12
[12451.049269] usb 4-2: new SuperSpeed USB device number 13 using xhci_hcd
[12451.065847] usb 4-2: New USB device found, idVendor=4971, idProduct=1020
[12451.065853] usb 4-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[12451.065857] usb 4-2: Product: Touro Mobile 3.0
[12451.065860] usb 4-2: Manufacturer: HGST
[12451.065863] usb 4-2: SerialNumber: 21001310120002202199
[12451.066573] usb-storage 4-2:1.0: USB Mass Storage device detected
[12451.066705] scsi19 : usb-storage 4-2:1.0
[12452.065847] scsi 19:0:0:0: Direct-Access HGST Touro Mobile 3.0 0
PQ: 0 ANSI: 6
[12452.066238] sd 19:0:0:0: Attached scsi generic sg3 type 0
[12452.066391] sd 19:0:0:0: [sdd] 1953525168 512-byte logical blocks: (1.00
TB/931 GiB)
[12452.03] sd 19:0:0:0: [sdd] Write Protect is off
[12452.07] sd 19:0:0:0: [sdd] Mode Sense: 43 00 00 00
[12452.066908] sd 19:0:0:0: [sdd] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[12452.868148] sdd: sdd1
[12452.869362] sd 19:0:0:0: [sdd] Attached SCSI disk
[12453.558732] usb 4-2: USB disconnect, device number 13
[12453.559817] sd 19:0:0:0: [sdd] Synchronizing SCSI cache
[12453.559851] sd 19:0:0:0: [sdd]
[12453.559854] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[12454.158937] usb 4-2: new SuperSpeed USB device number 14 using xhci_hcd
[12454.175483] usb 4-2: New USB device found, idVendor=4971, idProduct=1020
[12454.175489] usb 4-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[12454.175493] usb 4-2: Product: Touro Mobile 3.0
[12454.175496] usb 4-2: Manufacturer: HGST
[12454.175499] usb 4-2: SerialNumber: 21001310120002202199
[12454.176234] usb-storage 4-2:1.0: USB Mass Storage device detected
[12454.176415] scsi20 : usb-storage 4-2:1.0
[12455.175616] scsi 20:0:0:0: Direct-Access HGST Touro Mobile 3.0 0
PQ: 0 ANSI: 6
[12455.175999] sd 20:0:0:0: Attached scsi generic sg3 type 0
[12455.176174] sd 20:0:0:0: [sdd] 1953525168 512-byte logical blocks: (1.00
TB/931 GiB)
[12455.176438] sd 20:0:0:0: [sdd] Write Protect is off
[12455.176441] sd 20:0:0:0: [sdd] Mode Sense: 43 00 00 00
[12455.176700] sd 20:0:0:0: [sdd] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[12455.191702] sdd: sdd1
[12455.217808] sd 20:0:0:0: [sdd] Attached SCSI disk
[12456.896440] usb 4-2: USB disconnect, device number 14
[12456.897317] sd 20:0:0:0: [sdd] Synchronizing SCSI cache
[12456.897355] sd 20:0:0:0: [sdd]
[12456.897358] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[12457.136701] usb 4-2: new SuperSpeed USB device number 15 using xhci_hcd
[12457.153151] usb 4-2: New USB device found, idVendor=4971, idProduct=1020
[12457.153158] usb 4-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[12457.153161] usb 4-2: Product: Touro Mobile 3.0
[12457.153164] usb 4-2: Manufacturer: HGST
[12457.153167] usb 4-2: SerialNumber: 21001310120002202199
[12457.153976] usb-storage 4-2:1.0: USB Mass Storage device detected
[12457.154234] scsi21 : usb-storage 4-2:1.0
[12458.153225] scsi 21:0:0:0: Direct-Access HGST Touro Mobile 3.0 0
PQ: 0 ANSI: 6
[12458.153510] sd 21:0:0:0: Attached scsi generic sg3 type 0
[12458.153816] sd 21:0:0:0: [sdd] 1953525168 512-byte logical blocks: (1.00
TB/931 GiB)
[12458.154069] sd 21:0:0:0: [sdd] Write Protect is off
[12458.154074] sd 21:0:0:0: [sdd] Mode Sense: 43 00 00 00
[12458.154329] sd 21:0:0:0: [sdd] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[12458.171249] sdd: sdd1
[12458.172267] sd 21:0:0:0: [sdd] Attached SCSI disk
[12459.513747] usb 4-2: USB disconnect, device number 15
[12459.514370] sd 21:0:0:0: [sdd] Synchronizing SCSI cache
[12459.514428] sd 21:0:0:0: [sdd]
[12459.514431] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[12459.754117] usb 4-2: new SuperSpeed USB device number 16 using xhci_hcd
[12459.770665] usb 4-2: New USB device found, idVendor=4971, idProduct=1020
[12459.770671] usb 4-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[12459.770675] usb 4-2: Product: Touro Mobile 3.0
[12459.770678] usb 4-2: Manufacturer: HGST
[12459.770681] usb 4-2: SerialNumber: 21001310120002202199
[12459.771505] usb-storage 4-2:1.0: USB Mass Storage device detected
[12459.771640] scsi22 : usb-storage 4-2:1.0
[12460.770656] scsi 22:0:0:0: Direct-Access HGST Touro Mobile 3.0 0
PQ: 0 ANSI: 6
[12460.771003] sd 22:0:0:0: Attached scsi generic sg3 type 0
[12460.771236] sd 22:0:0:0: [sdd] 1953525168 512-byte logical blocks: (1.00
TB/931 GiB)
[12460.771509] sd 22:0:0:0: [sdd] Write Protect is off
[12460.771513] sd 22:0:0:0: [sdd] Mode Sense: 43 00 00 00
[12460.771753] sd 22:0:0:0: [sdd] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[12460.783805] sdd: sdd1
[12460.784735] sd 22:0:0:0: [sdd] Attached S