128k 100 count, 64k 200 count - both similar write speeds, around 475kB/s On Sun, Jul 5, 2009 at 3:25 AM, Ming Lei<tom.leiming@xxxxxxxxx> wrote: > 2009/7/5 Alex Yu <xshadowfire@xxxxxxxxx>: >> linux : dd if=/dev/zero of=/media/P3/test bs=1M count=10 conv=fdatasync >> windows: usbdeview > > Please try other block size(such as 64K, 128K) and count size to do > the write test again. > In fact, writing 1MB per scsi command is not common. > >> >> please use reply to all, thanks. >> >> On Sun, Jul 5, 2009 at 2:22 AM, Ming Lei<tom.leiming@xxxxxxxxx> wrote: >>> 2009/7/5 Alex Yu <xshadowfire@xxxxxxxxx>: >>>> resending as plaintext due to rejection from linux-usb@xxxxxxxxxxxxxxx >>>> >>>> On Sat, Jul 4, 2009 at 8:51 PM, Alex Yu <xshadowfire@xxxxxxxxx> wrote: >>>>> >>>>> I am getting very low write speeds to a Samsung P3 pmp - about 450KB/s. On windows, it is 4MB/s. I have tested this on 3 different machines and obtained similar results. >>> >>> How do you test the write speed on windows and linux? Would you mind >>> posting the test step in detail? >>> Thanks. >>> >>> -- >>> Lei Ming >>> >> > > -- > Lei Ming > -- 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
