On Thu, Feb 2, 2012 at 9:02 AM, Matt Graham
<danceswithcrows@usa.net> wrote:
From: Mark Phillips <mark@phillipsmarketing.biz>
> Gnome reported that the transfer speed was around 400 - 500 KB/sec.
> I then plugged the same stick into the same port on my laptop, but
> transferred files (~1.5 GB lots of little files) from Windows 7
> running in VMPlayer, and got a transfer speed of 4-5 MB/sec - 10
> times faster! Is there some magic in windows that makes USB sticks
> faster?
If ehci_hcd isn't loaded, then USB2 devices will be limited to USB1 speeds.
If a device is mounted with "-o sync", I/O on that device will be slower (but
it shouldn't have been that slow). If you're using an automounter, that
automounter may mount removable media with -o sync . Finally, your USB device
may have some sort of flag in unusual_devs.h that says "This device may not
work reliably at high speed; force it to low"--but I think that'd be unlikely.
Check the presence of ehci_hcd first.
OK, # lspci |grep -i ehci
00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
I assume that means it is ok. How do I check if devices are automounted with -o sync (debian testing)?
Mark