Date: Sat, 8 Jan 2005 15:10:50 -0800 From: Paul Hoffman <phoffman@proper.com> To: Julian Elischer <julian@elischer.org> Cc: freebsd-usb@freebsd.org Subject: Re: Getting USB2 on FreeBSD 5.3? Message-ID: <p0620072cbe0617663848@[10.20.30.249]> In-Reply-To: <41E05DE6.2060403@elischer.org> References: <p06200727be05ff8ca115@[10.20.30.249]> <41E05DE6.2060403@elischer.org>
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Thanks for all the info! At 2:25 PM -0800 1/8/05, Julian Elischer wrote: >how do you tell they happen at USB1 speeds? That was my assumption from the message about 1MB/sec transfers; as I said later, I can see that I'm actually getting about 7MB/sec. >>I can't tell why da0 is getting the slow (USB 1) mode. I also can't >>figure out what the heck ohci2 is; there is only the on-board USB 1 >>ports (which I assume are ohci0 and ohci1) and the card (which is >>clearly ehci0). Is ohci2 possibly also running on the add-in card >>and stomping on ehci0? > >the EHCI spec says that an EHCI controller will also contain N USB1 >controllers (ohci OR uhci) to handle USB1 devices. the devices are switched >to teh USB1 or USB 2 controller automatically by the hardware. Thanks, I missed that. >>I guess a related question is how can I tell what device umass0 >>thinks it is plugged into? > >You need to run usbdevs to see what is plugged in where. Thanks, I missed that. >>[[ I replied: >>Actually, it helps some. I am seeing similar results (well, 7.1 >>MB/s), so this is a bit heartening. But it doesn't explain why we're >>not seeing the 50 MB/s we're supposed to be seeing. >>]] > >you may get more in -current.. I'e seen 25MB/sec OK, a kinda-newbie question: given that this is a production machine, can I grab just the ehci-related files from -current and fairly-safely build them into the kernel? If so, how? What is the correct list of files to use? >50MB/sec is approachinghte theoretical maximum for bulk xfers >and I doubt you'll see that in practice. Fully understood. Even getting 15MB/sec would be a big improvement for me, given that I'm using the device as a backup for very large datasets. --Paul Hoffman
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