On Wed, 13 Jul 2005, vitko wrote: > Alan, I've run some preliminary 2.6.13-rc2 tests, but it seems that key factor > is really -o sync. > > With -o sync I'm still getting cca 150 kb/s write speed, whereas without > -o sync I was able to copy 712000298 bytes in 68 s (including sync and umount > commands, to be exact). This ammounts to some awesome 10 MB/s write speed, > while so far I've been able to get only cca 4 MB/s (yes, I've been mounting > with -o sync all the time until now). > > So now problem reduces to degraded write speeds with -o sync on kernel > > 2.6.11. > > Is it bug or feature? If the former, should I file a bug, if so, then is > it usb-storage, scsi, fat32 or some other issue?
I don't know the cause, but it's not the result of a change in the usb-storage or SCSI code. It could well be a change in FAT32. Go ahead and file a bug report, and direct it to the filesystem people. They should be able to explain everything. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by the 'Do More With Dual!' webinar happening July 14 at 8am PDT/11am EDT. We invite you to explore the latest in dual core and dual graphics technology at this free one hour event hosted by HP, AMD, and NVIDIA. To register visit http://www.hp.com/go/dualwebinar _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
