主路由-usb3.0被Fake-U3转接头欺骗！正式速度75M/s

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2018-07-28
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root@dd-wrt-nxt:~# dmesg | grep USB
[ 1.420912] bcma: bus0: Core 11 found: USB 2.0 (manuf 0x4BF, id 0x504, rev 0x01, class 0x0)
[ 1.429363] bcma: bus0: Core 12 found: USB 3.0 (manuf 0x4BF, id 0x505, rev 0x01, class 0x0)
[ 4.229837] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 4.247013] bcm_ns_usb3 18105000.usb3-phy: Registered Broadcom Northstar USB 3.0 PHY driver
[ 4.249550] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 4.251374] ohci-platform 18022000.ohci: new USB bus registered, assigned bus number 1
[ 4.292052] ehci-platform 18021000.ehci: new USB bus registered, assigned bus number 2
[ 4.314846] hub 1-0:1.0: USB hub found
[ 4.332375] ehci-platform 18021000.ehci: USB 2.0 started, EHCI 1.00
[ 4.332954] hub 2-0:1.0: USB hub found
[ 4.350512] xhci-hcd 18023000.xhci: new USB bus registered, assigned bus number 3
[ 4.373327] hub 3-0:1.0: USB hub found
[ 4.389854] xhci-hcd 18023000.xhci: new USB bus registered, assigned bus number 4
[ 4.418856] hub 4-0:1.0: USB hub found
[ 5.148852] usb 4-1: new SuperSpeed USB device number 2 using xhci-hcd
[ 5.200195] usb-storage 4-1:1.0: USB Mass Storage device detected
[ 6.252535] scsi 0:0:0:0: Direct-Access TOSHIBA External USB 3.0 0205 PQ: 0 ANSI: 6
[ 10.359714] usbserial: USB Serial support registered for generic
[ 10.497959] usbserial: USB Serial support registered for GSM modem (1-port)
root@dd-wrt-nxt:~# history

/dev/sda3:
Timing cached reads: 534 MB in 2.00 seconds = 267.05 MB/sec
Timing buffered disk reads: 212 MB in 3.02 seconds = 70.28 MB/sec
Timing cached reads: 564 MB in 2.00 seconds = 281.33 MB/sec
Timing buffered disk reads: 80 MB in 3.04 seconds = 26.31 MB/sec
====================================================================
root@dd-wrt-nxt:~# hdparm -Tt /dev/sda1

/dev/sda1:
-----------usb3.0-----First--------------
Timing cached reads: 636 MB in 2.00 seconds = 318.03 MB/sec
Timing buffered disk reads: 230 MB in 3.02 seconds = 76.10 MB/sec
-----------usb3.0-----Second-------------
Timing cached reads: 574 MB in 2.01 seconds = 286.27 MB/sec
Timing buffered disk reads: 224 MB in 3.01 seconds = 74.40 MB/sec
-----------usb3.0-----Third-------------
Timing cached reads: 682 MB in 2.00 seconds = 340.91 MB/sec
Timing buffered disk reads: 226 MB in 3.00 seconds = 75.23 MB/sec
----------usb2.0 --------------------------
Timing cached reads: 574 MB in 2.00 seconds = 286.36 MB/sec
Timing buffered disk reads: 90 MB in 3.05 seconds = 29.47 MB/sec
---------usb3.0 switch header!---------------
Timing cached reads: 664 MB in 2.00 seconds = 331.54 MB/sec
Timing buffered disk reads: 82 MB in 3.07 seconds = 26.69 MB/sec

/dev/ubiblock0_0:
Timing cached reads: 566 MB in 2.00 seconds = 282.31 MB/sec
Timing buffered disk reads: 4 MB in 0.71 seconds = 5.63 MB/sec

/dev/zero:
2486 MB in 2.00 seconds = 1244.18 MB/sec

/dev/sda:
Timing cached reads: 686 MB in 2.00 seconds = 342.36 MB/sec
Timing buffered disk reads: 220 MB in 3.02 seconds = 72.91 MB/sec

/dev/mtdblock0:
Timing cached reads: 670 MB in 2.00 seconds = 334.82 MB/sec
Timing buffered disk reads: 20 MB in 3.18 seconds = 6.29 MB/sec

root@dd-wrt-nxt:~# hdparm -Tt /dev/mtdblock1
Timing cached reads: 626 MB in 2.00 seconds = 312.22 MB/sec
Timing buffered disk reads: 20 MB in 3.20 seconds = 6.25 MB/sec
root@dd-wrt-nxt:~# hdparm -Tt /dev/mtd3

可以从系统记录里面查看插入的USB设备被识别为USB2.0（high speed ehci）还是USB3.0（SuperSpeed xhci）