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

[Paul Hartman]

On Sun, Dec 27, 2009 at 12:10 PM, Paul Hartman
<paul.hartman+gentoo@×××××.com> wrote:
> On Sun, Dec 27, 2009 at 12:01 AM, Michael Holmes
> <holmesmich@××××××××××.com> wrote:
>> 2009/12/27 Paul Hartman <paul.hartman+gentoo@×××××.com>:
>>> On Sat, Dec 26, 2009 at 7:00 PM, Hung Dang <hungptit@×××××.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).
>
> When I said "sync" mode I mean mounting the device in mass storage
> mode with with "-o sync" (as opposed to the default cached/async
> mode), which I believe is the default in Windows Vista & Win7 (because
> most windows users cannot be bothered to unmount before pulling the
> plug).
>
> Thanks

Well, after a bit more plugging/unplugging of all my USB devices into
various ports in different orders, it seems to be going fast now. I
hate USB :)

Thanks for the help