[Bug 220549] External USB 3.0 drive does not work when attached to USB 2.0 port in laptop

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220549

Hans Petter Selasky <hselasky at FreeBSD.org> changed:

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                 CC|                            |hselasky at FreeBSD.org

--- Comment #2 from Hans Petter Selasky <hselasky at FreeBSD.org> ---
Hi,

This is likely a SCSI / CAM protocol issue and not an USB issue.

Can you dump all the USB commands from 10.x and 11.1 ?

1) plug device and note ugenX.Y numbers
2) unplug device
3) start "usbdump -i usbusX -f Y -s 65536 -w freebsd10.pcap"
4) CTRL+C and safe .pcap file.

Repeat for FreeBSD 11.

--HPS

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