Date: Fri, 19 Jan 2024 14:24:19 +0000 From: Gary Jennejohn <garyj@gmx.de> To: Matthias Apitz <guru@unixarea.de> Cc: freebsd-usb@freebsd.org Subject: Re: USB key is 2.0 or 3.0 Message-ID: <20240119152419.03ddec41@ernst.home> In-Reply-To: <ZalgOl6WJZ7vyXyL@c720-1400094> References: <ZakiueSm0dPskpSr@pureos> <20240118142634.69f7d675@ernst.home> <ZalgOl6WJZ7vyXyL@c720-1400094>
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On Thu, 18 Jan 2024 18:30:34 +0100
Matthias Apitz <guru@unixarea.de> wrote:
> I've two new USB keys, both claiming on its wrapping USB 3.0:
>
> usbconfig -v reads from them:
>
> ugen0.4: <Generic Mass Storage> at usbus0, cfg=3D0 md=3DHOST spd=3DHIGH =
(480Mbps) pwr=3DON (200mA)
> ugen0.4.0: umass0: <Generic Mass Storage, class 0/0, rev 2.10/0.02, addr=
5>
>
> bLength =3D 0x0012
> bDescriptorType =3D 0x0001
> bcdUSB =3D 0x0210
> bDeviceClass =3D 0x0000 <Probed by interface class>
> bDeviceSubClass =3D 0x0000
> bDeviceProtocol =3D 0x0000
> bMaxPacketSize0 =3D 0x0040
> idVendor =3D 0x058f
> idProduct =3D 0x6387
> bcdDevice =3D 0x0002
> iManufacturer =3D 0x0001 <Generic>
> iProduct =3D 0x0002 <Mass Storage>
> iSerialNumber =3D 0x0003 <A430786F>
> bNumConfigurations =3D 0x0001
>
>
> ugen0.4: <USB SanDisk 3.2Gen1> at usbus0, cfg=3D0 md=3DHOST spd=3DHIGH (=
480Mbps) pwr=3DON (224mA)
> ugen0.4.0: umass0: <USB SanDisk 3.2Gen1, class 0/0, rev 2.10/1.00, addr =
4>
>
> bLength =3D 0x0012
> bDescriptorType =3D 0x0001
> bcdUSB =3D 0x0210
> bDeviceClass =3D 0x0000 <Probed by interface class>
> bDeviceSubClass =3D 0x0000
> bDeviceProtocol =3D 0x0000
> bMaxPacketSize0 =3D 0x0040
> idVendor =3D 0x0781
> idProduct =3D 0x55ab
> bcdDevice =3D 0x0100
>
> Both say on plugin "da0: 40.000MB/s transfers"; the USB port itself says
> on plugin of an external disks "da0: 400.000MB/s transfers", what is
> expected for USB 3.0;
>
> Why both USB keys only reach da0: 40.000MB/s?
>
You could try running usbdump(8). Be aware that you need device bpf and
perhaps options DEV_BPF in your kernel config file if you aren't running a
GENERIC kernel.
usbdump has to be run as root.
I tried it with a USB3 and a USB2 thumb drive, plugging both into a USB3
port.
I used this command line: usbdump -d ugenX.Y -s 256 -w /tmp/USB{2,3} to
save the output and then usbdump -r /tmp/USB{2,3} to get the user
readable text.
You'll probably want to use different names for the -w file names.
I simply plugged in and unplugged each thumb drive and then stopped
usbdump.
The USB3 thumb drive always showed SPD=3DSUPER and the USB2 thumb drive
always showed SPD=3DHIGH in the user readable text.
So, if your disk shows SPD=3DSUPER and the thumb drives show SPD=3DHIGH
then the thumb drives are NOT USB3.
=2D-
Gary Jennejohn
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