Ubuntu
gvfs package

  1. Bug #197762
  2. Comment #89

Comment 89 for bug 197762

Revision history for this message
goto (gotolaunchpad) wrote : Re: file transfers on USB disk are very slow

Thanks for your response Chris,

I edited the fstab through UUID and /dev/sd* but with the same result. The only difference is that if I reboot, the system wont load because it displays the message "hub 4-0:1.0: unable to enumerate USB device on port 3" forever. The only way to boot is to disconnect the usb drive and reboot again.

I've tested many mount options and tried synchronuos and async.

On the previous post (https://bugs.launchpad.net/ubuntu/+source/gvfs/+bug/197762/comments/86) when i said i bought a new USB i meant a new USB Drive.

The normal copy behaviour on my drive is: First 68 MB are copied really fast. Then it gets stalled (around 5 seconds) and then continues coping at 1mbps or less, with some random intermitent stalled periods.

Perhaps there is some kind of problem when detecting the usb drive (with old USB disks (40GB) i have no problems and under windows the USB gets 20mbps, so i don't think it's a hardware issue). I'm not a hardware expert so I don't know where to start. Or perhaps its a communication issue with new external HD USB controlers.

I've downloaded the latest kernel source files to have a look into ehci module and usb drivers. The USB related source files related are unchanged since 1999, or 2003 the newer ones.

More notes:
On source files: linux-2.6.9/drivers/ehci-*.c (unchanged since 2001 or 2003) there are LOTS of "FIXME" notes from the developer.

I will try to compile the module by myself and do some random patches here and there to see what happens (yes, it sounds stupid).

Final note: "goto" is a BugMeNot account. I'm unable to get registered here, tested with different mail accounts and i don't receive the confirmation mail.