2009/12/27 Paul Hartman <[email protected]>: > On Sat, Dec 26, 2009 at 7:00 PM, Hung Dang <[email protected]> wrote: >> On 12/26/09 15:54, Paul Hartman wrote: >>> Hi, >>> >>> I got a Nokia N900 linux internet tablet/phone a few days ago, and >>> when I connect it in USB Mass Storage mode to a Windows Vista computer >>> I can write at 17MB/sec, but when I connect it to my Gentoo box my >>> writes are really slow, between 500-900kb/sec depending on if I mount >>> in "sync" mode or not. As far as I know it should be just a totally >>> standard/generic mass storage device. (there were no drivers or >>> software install needed in windows, it just worked) >>> >>> Other USB devices plugged into the same port go full speed, and AFAIK >>> everything appears as if it should be high speed USB 2.0. Has anyone >>> seen something like this before? I'm not sure what the deal is. It >>> takes 20 minutes to copy 1 gigabyte from Linux and takes just under 1 >>> minute to do the same in Windows. >>> >>> I'm not sure about debugging USB or what the options are. Everything >>> I've used previously has worked without any hassle. >> Have you received a lot of debugging messages at the output of dmesg >> when copying files? >> >> Hung > > No errors, no strange messages at all, it seems normal (only slow). I > have other USB devices like SD card reader, external HDD, and they > perform at full speed when plugged into the same port, so it's weird > to me. > > Thanks > Paul > >
This isn't that helpful, but in Windows I get good thoroughputs in mass storage mode, but compartively weak ones in sync mode. But this shouldn't be the problem because as far as I know, there are no ync-mode drivers for good old Linux (which is ironic if you consider it).
