[    0.000000] Linux version 3.12.0-4-generic (buildd@allspice) (gcc version 4.8.2 (Ubuntu/Linaro 4.8.2-5ubuntu3) ) #10-Ubuntu SMP Thu Nov 21 22:07:26 UTC 2013 (Ubuntu 3.12.0-4.10-generic 3.12.1)
...
[  190.025661] usb 3-2: new SuperSpeed USB device number 2 using xhci_hcd
[  190.041993] usb 3-2: New USB device found, idVendor=1058, idProduct=0740
[  190.042002] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[  190.042006] usb 3-2: Product: My Passport 0740
[  190.042011] usb 3-2: Manufacturer: Western Digital
[  190.042015] usb 3-2: SerialNumber: 575847314139315836343531
[  190.043053] usb-storage 3-2:1.0: USB Mass Storage device detected
[  190.043203] scsi7 : usb-storage 3-2:1.0
[  191.209252] usb 3-2: USB disconnect, device number 2
[  211.746925] scsi 7:0:0:0: Device offlined - not ready after error recovery
[  211.987207] usb 3-2: new SuperSpeed USB device number 3 using xhci_hcd
[  212.003490] usb 3-2: New USB device found, idVendor=1058, idProduct=0740
[  212.003498] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[  212.003503] usb 3-2: Product: My Passport 0740
[  212.003507] usb 3-2: Manufacturer: Western Digital
[  212.003511] usb 3-2: SerialNumber: 575847314139315836343531
[  212.004672] usb-storage 3-2:1.0: USB Mass Storage device detected
[  212.004887] scsi8 : usb-storage 3-2:1.0
[  213.170760] usb 3-2: USB disconnect, device number 3
[  233.756448] scsi 8:0:0:0: Device offlined - not ready after error recovery
[  233.996735] usb 3-2: new SuperSpeed USB device number 4 using xhci_hcd
[  234.012980] usb 3-2: New USB device found, idVendor=1058, idProduct=0740
[  234.012988] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[  234.012993] usb 3-2: Product: My Passport 0740
[  234.012998] usb 3-2: Manufacturer: Western Digital
[  234.013002] usb 3-2: SerialNumber: 575847314139315836343531
[  234.014082] usb-storage 3-2:1.0: USB Mass Storage device detected
[  234.014297] scsi9 : usb-storage 3-2:1.0
[  235.180186] usb 3-2: USB disconnect, device number 4
[  255.765983] scsi 9:0:0:0: Device offlined - not ready after error recovery
[  256.006037] usb 3-2: new SuperSpeed USB device number 5 using xhci_hcd
[  256.022469] usb 3-2: New USB device found, idVendor=1058, idProduct=0740
[  256.022478] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[  256.022483] usb 3-2: Product: My Passport 0740
[  256.022487] usb 3-2: Manufacturer: Western Digital
[  256.022491] usb 3-2: SerialNumber: 575847314139315836343531
[  256.023445] usb-storage 3-2:1.0: USB Mass Storage device detected
[  256.023658] scsi10 : usb-storage 3-2:1.0
[  257.189620] usb 3-2: USB disconnect, device number 5
[  277.775509] scsi 10:0:0:0: Device offlined - not ready after error recovery
[  278.015785] usb 3-2: new SuperSpeed USB device number 6 using xhci_hcd
[  278.032024] usb 3-2: New USB device found, idVendor=1058, idProduct=0740
[  278.032033] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[  278.032038] usb 3-2: Product: My Passport 0740
[  278.032043] usb 3-2: Manufacturer: Western Digital
[  278.032047] usb 3-2: SerialNumber: 575847314139315836343531
[  278.033183] usb-storage 3-2:1.0: USB Mass Storage device detected
[  278.033405] scsi11 : usb-storage 3-2:1.0
[  279.199187] usb 3-2: USB disconnect, device number 6
[  281.312224] EXT4-fs (sda4): mounted filesystem with ordered data mode. Opts: (null)
[  299.785036] scsi 11:0:0:0: Device offlined - not ready after error recovery
[  300.025073] usb 3-2: new SuperSpeed USB device number 7 using xhci_hcd
[  300.041523] usb 3-2: New USB device found, idVendor=1058, idProduct=0740
[  300.041526] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[  300.041527] usb 3-2: Product: My Passport 0740
[  300.041529] usb 3-2: Manufacturer: Western Digital
[  300.041530] usb 3-2: SerialNumber: 575847314139315836343531
[  300.042386] usb-storage 3-2:1.0: USB Mass Storage device detected
[  300.042473] scsi12 : usb-storage 3-2:1.0
[  301.208705] usb 3-2: USB disconnect, device number 7
[  321.730603] scsi 12:0:0:0: Device offlined - not ready after error recovery
[  321.970863] usb 3-2: new SuperSpeed USB device number 8 using xhci_hcd
[  321.987144] usb 3-2: New USB device found, idVendor=1058, idProduct=0740
[  321.987152] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[  321.987157] usb 3-2: Product: My Passport 0740
[  321.987161] usb 3-2: Manufacturer: Western Digital
[  321.987165] usb 3-2: SerialNumber: 575847314139315836343531
[  321.988333] usb-storage 3-2:1.0: USB Mass Storage device detected
[  321.988583] scsi13 : usb-storage 3-2:1.0
[  323.154410] usb 3-2: USB disconnect, device number 8
[  343.740117] scsi 13:0:0:0: Device offlined - not ready after error recovery
[  343.980387] usb 3-2: new SuperSpeed USB device number 9 using xhci_hcd
[  343.996643] usb 3-2: New USB device found, idVendor=1058, idProduct=0740
[  343.996652] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[  343.996657] usb 3-2: Product: My Passport 0740
[  343.996661] usb 3-2: Manufacturer: Western Digital
[  343.996666] usb 3-2: SerialNumber: 575847314139315836343531
[  343.997720] usb-storage 3-2:1.0: USB Mass Storage device detected
[  343.997934] scsi14 : usb-storage 3-2:1.0
[  345.163966] usb 3-2: USB disconnect, device number 9
[  365.685712] scsi 14:0:0:0: Device offlined - not ready after error recovery
[  365.925935] usb 3-2: new SuperSpeed USB device number 10 using xhci_hcd
[  365.942218] usb 3-2: New USB device found, idVendor=1058, idProduct=0740
[  365.942226] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[  365.942232] usb 3-2: Product: My Passport 0740
[  365.942236] usb 3-2: Manufacturer: Western Digital
[  365.942240] usb 3-2: SerialNumber: 575847314139315836343531
[  365.943318] usb-storage 3-2:1.0: USB Mass Storage device detected
[  365.943538] scsi15 : usb-storage 3-2:1.0
[  367.109517] usb 3-2: USB disconnect, device number 10
[  387.695233] scsi 15:0:0:0: Device offlined - not ready after error recovery