XIGMATEK secure III, usb 3.0

[  249.332710] usb 4-3: new SuperSpeed USB device number 5 using xhci_hcd
[  249.349266] usb 4-3: New USB device found, idVendor=174c, idProduct=55aa
[  249.349273] usb 4-3: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[  249.349276] usb 4-3: Product: ASMT1051
[  249.349279] usb 4-3: Manufacturer: asmedia
[  249.349281] usb 4-3: SerialNumber: 12345678A02E
[  249.349705] usb-storage 4-3:1.0: USB Mass Storage device detected
[  249.349875] usb-storage 4-3:1.0: Quirks match for vid 174c pid 55aa: 400000
[  249.349948] scsi9 : usb-storage 4-3:1.0
[  250.349417] scsi 9:0:0:0: Direct-Access     ASMT     2105             0    PQ: 0 ANSI: 6
[  250.350216] sd 9:0:0:0: Attached scsi generic sg5 type 0
[  250.351426] sd 9:0:0:0: [sde] 976773168 512-byte logical blocks: (500 GB/465 GiB)
[  250.351668] sd 9:0:0:0: [sde] Write Protect is off
[  250.351673] sd 9:0:0:0: [sde] Mode Sense: 43 00 00 00
[  250.351897] sd 9:0:0:0: [sde] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[  250.398727]  sde: sde1 sde2 < sde5 >
[  250.400395] sd 9:0:0:0: [sde] Attached SCSI disk

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TEST

USB 2.0:

charles-chang@jessie431:~$ time -p bash -c "cp sd/test11 sd/test; sudo umount sd"
real 52.59
user 0.04
sys 3.22
charles-chang@jessie431:~$ sudo mount /dev/sde1 sd 
charles-chang@jessie431:~$ rm sd/test
charles-chang@jessie431:~$ time -p bash -c "cp sd/test11 sd/test; sudo umount sd"
real 53.93
user 0.02
sys 3.22
charles-chang@jessie431:~$ sudo mount /dev/sde1 sd 
charles-chang@jessie431:~$ rm sd/test
charles-chang@jessie431:~$ time -p bash -c "cp sd/test11 sd/test; sudo umount sd"
real 52.77
user 0.04
sys 3.19

USB 3.0:

charles-chang@jessie431:~$ time -p bash -c "cp sd/test11 sd/test; sudo umount sd"
real 17.81
user 0.02
sys 2.18
charles-chang@jessie431:~$ sudo mount /dev/sde1 sd 
charles-chang@jessie431:~$ rm sd/test
charles-chang@jessie431:~$ time -p bash -c "cp sd/test11 sd/test; sudo umount sd"
real 17.53
user 0.02
sys 2.14
charles-chang@jessie431:~$ sudo mount /dev/sde1 sd 
charles-chang@jessie431:~$ rm sd/test
charles-chang@jessie431:~$ time -p bash -c "cp sd/test11 sd/test; sudo umount sd"
real 17.64
user 0.00
sys 2.15