Same problem with kernel 3.2.20 (wheezy):
Jun 15 03:10:29 asterisk kernel: [ 148.000243] usb 4-2: new SuperSpeed
USB device number 2 using xhci_hcd
Jun 15 03:10:29 asterisk kernel: [ 148.018527] xhci_hcd 0000:02:00.0:
WARN: short transfer on control ep
Jun 15 03:10:29 asterisk kernel: [ 148.018899] xhci_hcd 0000:02:00.0:
WARN: short transfer on control ep
Jun 15 03:10:29 asterisk kernel: [ 148.019274] xhci_hcd 0000:02:00.0:
WARN: short transfer on control ep
Jun 15 03:10:29 asterisk kernel: [ 148.019649] xhci_hcd 0000:02:00.0:
WARN: short transfer on control ep
Jun 15 03:10:29 asterisk kernel: [ 148.019781] usb 4-2: New USB device
found, idVendor=0480, idProduct=a006
Jun 15 03:10:29 asterisk kernel: [ 148.019785] usb 4-2: New USB device
strings: Mfr=1, Product=2, SerialNumber=3
Jun 15 03:10:29 asterisk kernel: [ 148.019788] usb 4-2: Product:
External USB 3.0
Jun 15 03:10:29 asterisk kernel: [ 148.019790] usb 4-2: Manufacturer:
Toshiba
Jun 15 03:10:29 asterisk kernel: [ 148.019792] usb 4-2: SerialNumber:
2012041641639
Jun 15 03:10:29 asterisk kernel: [ 148.091846] usbcore: registered new
interface driver uas
Jun 15 03:10:29 asterisk kernel: [ 148.103688] Initializing USB Mass
Storage driver...
Jun 15 03:10:29 asterisk kernel: [ 148.103840] scsi6 : usb-storage 4-2:1.0
Jun 15 03:10:29 asterisk kernel: [ 148.103949] usbcore: registered new
interface driver usb-storage
Jun 15 03:10:29 asterisk kernel: [ 148.103951] USB Mass Storage support
registered.
Jun 15 03:10:34 asterisk kernel: [ 152.801159] scsi 6:0:0:0:
Direct-Access TOSHIBA External USB 3.0 0001 PQ: 0 ANSI: 6
Jun 15 03:10:34 asterisk kernel: [ 152.803508] sd 6:0:0:0: [sdc]
1953525168 512-byte logical blocks: (1.00 TB/931 GiB)
Jun 15 03:10:34 asterisk kernel: [ 152.803618] xhci_hcd 0000:02:00.0:
WARN: Stalled endpoint
Jun 15 03:10:34 asterisk kernel: [ 152.804394] sd 6:0:0:0: [sdc] Write
Protect is off
Jun 15 03:10:34 asterisk kernel: [ 152.804689] xhci_hcd 0000:02:00.0:
WARN: Stalled endpoint
Jun 15 03:10:34 asterisk kernel: [ 152.805361] sd 6:0:0:0: [sdc] Write
cache: disabled, read cache: enabled, doesn't support DPO or FUA
Jun 15 03:10:34 asterisk kernel: [ 152.806236] xhci_hcd 0000:02:00.0:
WARN: Stalled endpoint
Jun 15 03:10:34 asterisk kernel: [ 152.806851] xhci_hcd 0000:02:00.0:
WARN: Stalled endpoint
Jun 15 03:10:34 asterisk kernel: [ 152.831555] sdc: sdc1
Jun 15 03:10:34 asterisk kernel: [ 152.834210] xhci_hcd 0000:02:00.0:
WARN: Stalled endpoint
Jun 15 03:10:34 asterisk kernel: [ 152.834836] xhci_hcd 0000:02:00.0:
WARN: Stalled endpoint
Jun 15 03:10:34 asterisk kernel: [ 152.835345] sd 6:0:0:0: [sdc]
Attached SCSI disk
Jun 15 03:10:34 asterisk kernel: [ 152.848695] xhci_hcd 0000:02:00.0:
WARN: Stalled endpoint
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