On Thu, Dec 03, 2009 at 08:43:11PM +0330, Roozbeh Gholizadeh wrote: > On Thu, 03 Dec 2009 03:09:45 +0330, Greg KH <greg@xxxxxxxxx> wrote: > > > On Thu, Dec 03, 2009 at 01:52:36AM +0330, Roozbeh Gholiza wrote: > >> > >> I've recently have this issue that moving files takes a lots of time, at > >> first it starts with decent speed (3MB/S) then it gradually decreses > >> into > >> 100/200KB/S. My usb flashdisk is 4gb formatted in fat32. > >> It seems to me it is related to kernel.Anyway here is my info : > > > > Do you have the "sync" option for fat32 enabled? If so, that will cause > > this to happen. Several distros enabled this a while ago to ensure you > > would get the data written out quicker. > > > > I guess it is turned off.At least i turned it off with every solution > posted in internet, such as creating mount policy, unmounting and > remounting with mount async option, also used 3 different versions of > kernel and all seems to suffer from this. > > Besides, enabling sync option and having slow performance, couldnt this > also considered as a bug? Not really, your device could just be slow. Are you sure it isn't a device issue? Try doing this on a USB disk drive, with rotating media behind it, that would take the USB connection out of the loop. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
