Re: [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...?

[Michael Holmes <holmesmich@googlemail.com>]

2009/12/27 Paul Hartman <paul.hartman+gentoo@gmail.com>:
> On Sat, Dec 26, 2009 at 7:00 PM, Hung Dang <hungptit@gmail.com> 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).