On Tue, 5 Nov 2002, Charlie Brady wrote: > Will USB 2.0 devices work just fine, but at lower speed, on a USB 1.1 bus?
Thanks for all the responses. The consensus is "yes". The linux-usb.org doco is clear: "You can connect USB 2.0 devices to USB 1.1 hosts and hubs, and they should work just fine ... but at 12 Mbit/sec, not at 480 Mbit/sec." By comparison, the Intel FAQ (http://www.intel.com/technology/usb/faq.htm) is far from clear: Will my PC today work with a Hi-Speed USB 2.0 peripheral product? Assuming you have a PC that has USB 1.1 (which is most likely), if you plug your Hi-Speed USB 2.0 peripheral into the USB 1.1 system, your system will perform at the USB 1.1 speed.(1) You will need to update your PC either by adding in a PCI add-in card or purchasing a new MB with a discrete host controller that supports Hi-Speed USB 2.0 and installing Hi-Speed USB 2.0 drivers. (2) The ambiguities: (1) OK my "system" will perform at 1.1 speed, but will the 2.0 "peripheral product" work OK? (2) I *will* need to update the PC, or I will need to update the PC to get full speed from the peripheral? One comment on USB tape drives - didn't work reliably, and was slower than IDE. Thanks again folks -- Charlie Brady [EMAIL PROTECTED] Lead Product Developer Network Server Solutions Group http://www.e-smith.com/ Mitel Networks Corporation http://www.mitel.com/ Phone: +1 (613) 592 5660 or 592 2122 Fax: +1 (613) 592 1175 -- Please report bugs to [EMAIL PROTECTED] Please mail [EMAIL PROTECTED] (only) to discuss security issues Support for registered customers and partners to [EMAIL PROTECTED] To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Searchable archive at http://www.mail-archive.com/devinfo%40lists.e-smith.org
