On Thu, Nov 14, 2024 at 02:31:42AM +0800, hlyg wrote:
> Thank tomas! actually i am amateur on this subject
You are welcome :-)
We all are amateurs (amateur is French and means you love something,
so... :)
> but at my local market, usb devices aren't as colorful as Ritter describe,
> blue indicates usb3
Most of the time it is true. But you don't know until you try :-)
For example, my laptop's ports are black, but they are USB3 capable.
If I stick an old, 2.0 stick, "lsusb -v" (needs sudo) says:
Bus 001 Device 006: ID 0781:5567 SanDisk Corp. Cruzer Blade
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0781 SanDisk Corp.
idProduct 0x5567 Cruzer Blade
bcdDevice 1.03
iManufacturer 1 SanDisk
iProduct 2 Cruzer Blade
iSerial 3 200443243302BCC0F8A8
bNumConfigurations 1
See the "bcdUSB" there? It's 2.0. Whereas a more modern stick, which
I bought two weeks ago for a local Linux install party says:
Bus 002 Device 003: ID 0951:1666 Kingston Technology DataTraveler 100 G3/G4/SE9 G2/50 Kyson
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.20
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x0951 Kingston Technology
idProduct 0x1666 DataTraveler 100 G3/G4/SE9 G2/50 Kyson
bcdDevice 1.10
iManufacturer 2 Kingston
iProduct 3 DataTraveler 3.0
iSerial 4 4CEDFB74A3A417C1791703BA
bNumConfigurations 1
Now bcdUSB says 3.2
Cheers
--
t
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