On Wed, 28 Sep 2005, Marc Schiffbauer wrote: > Hi all, > > I have an usb-storage device in my Computer hat can handle several > memory-cards like CF, SD, MMC, MS and SM Cards. > > I often read/write to my 1 gig SD card (USB 2.0). Reading is always > fast (~ 5MB/s) using Kernel 2.6.12 or 2.6.13. > > But: Writing to the card is very very slow: < 40 kb/s. > > My kubuntu system mounts that kind of devices like that: > /dev/sda1 on /media/sda1 type vfat > > (rw,noexec,nosuid,nodev,sync,quiet,uid=1000,gid=1000,umask=077,iocharset=utf8) > > Now I discovered that if I do a "mount -o remount,async /meda/sda1", > the writing speed increases to a normal value of about 5 megs/s. > > I remember, that the problem did not exist with earlier kernels > (and this version of kubuntu) > > I think this might be a kernel bug introduced by some patch applied before > 2.6.12.
It's not a bug; it's deliberate. :-) See this bug report: http://bugzilla.kernel.org/show_bug.cgi?id=4882 Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by: Power Architecture Resource Center: Free content, downloads, discussions, and more. http://solutions.newsforge.com/ibmarch.tmpl _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
