On Fri, Jun 17, 2016 at 08:30:47PM +0200, Michael Schaller wrote: > Greg, for my initial tests I did a sync afterwards and it finished > immediately on Linux and Mac OS X. Sorry for not mentioning that > earlier. That's really odd, and is not normal for either OS. > Furthermore 270 MB/s is the advertised write rate of the flash drive. > Mac OS X and Window can both write at the advertised speed and Linux > only reaches ~45 MB/s (~1/6th). > If someone is interested into digging deeper into this issue I can > look into shipping one of these flash drives... Are the devices already mounted by the os? If so, your mount options will have a huge influence on this. Try unmounting them first before doing "raw" 'dd' copies to them. Also, look into using the fio tool to test the real speeds here, dd is not the best tool for it. 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
