Way back in 2011, I bought a Buffalo DVD Writer which was USB 2.0 and it had main data + power and also an Aux power cable. So it needed two USB ports to work. It also had an LED indicator that would turn Red if it was not getting enough power. Eventually it failed and found its way into e-waste.
Recently I purchased an unbranded (Pop Up Mobile CD Writer Model ECD829) from Amazon. The writer is working fine when connected to USB 3.0 port. The device comes with USB 3.0 A as well as C plug. The product page on Amazon says USB 3.0. The box also mentions USB 3.0 written on it.
However, when I connect it to USB 3.0 port, USBTreeView app on Windows 11 shows that it’s not Super-Speed but a High-Speed device.
Device Bus Speed : 0x02 (High-Speed)
Flags : 0x00
DevIsOpAtSsOrHigher : 0 (Is not operating at SuperSpeed or higher)
DevIsSsCapOrHigher : 0 (Is not SuperSpeed capable or higher)
DevIsOpAtSsPlusOrHigher : 0 (Is not operating at SuperSpeedPlus or higher)
DevIsSsPlusCapOrHigher : 0 (Is not SuperSpeedPlus capable or higher)
---------------------- Device Descriptor ----------------------
bcdUSB : 0x200 (USB Version 2.00)
It also shows H mark on the specific port.
However when I take a close look at the USB plug, I see 9 pins on it. See these photos.
So I am not able to add all this together. There are 9 pins but App shows High-Speed and the device is running fine assuming it’s USB 2.0 with just 500mA of current? All activities CD read/write (burning) are operating fine. I understand CDs with 24X or DVDs with 8X certainly do not need USB 3.0 data speed capabilities. But I am not too sure about power.
Can someone explain this behavior?
