On Fri, Mar 13, 2020 at 11:17 AM James <bjlockie@xxxxxxxxx> wrote: > > This is USB2, right? Yes, from below message, you could know it. > bcdUSB 2.00 > wMaxPacketSize 0x0200 1x 512 bytes Besides, when you plug in USB device, you could type "dmesg", it will show "new high-speed USB device number xxx" Peter > I'm trying to buy a USB dvdrw on Amazon but even different sellers sell > the same thing under a different "brand". > > $ sudo lsusb -v -d 13fd:0840 > Bus 001 Device 006: ID 13fd:0840 Initio Corporation INIC-1618L SATA > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 2.00 > bDeviceClass 0 > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 64 > idVendor 0x13fd Initio Corporation > idProduct 0x0840 INIC-1618L SATA > bcdDevice 1.14 > iManufacturer 1 Generic > iProduct 2 External > iSerial 3 554830302020323534363832 > bNumConfigurations 1 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 0x0020 > bNumInterfaces 1 > bConfigurationValue 1 > iConfiguration 0 > bmAttributes 0xc0 > Self Powered > MaxPower 2mA > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 2 > bInterfaceClass 8 Mass Storage > bInterfaceSubClass 2 SFF-8020i, MMC-2 (ATAPI) > bInterfaceProtocol 80 > iInterface 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x81 EP 1 IN > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x02 EP 2 OUT > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 0 > Device Qualifier (for other device speed): > bLength 10 > bDescriptorType 6 > bcdUSB 2.00 > bDeviceClass 0 > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 64 > bNumConfigurations 1 > can't get debug descriptor: Resource temporarily unavailable > Device Status: 0x0001 > Self Powered
