Very slow umass in 6.2-RC2

[Oliver Fromme]

Alexander Shikoff wrote:
 > Wang Yi wrote:
 > > Alexander Shikoff wrote:
 > > > I have Apacer Flash:
 > > > 
 > > > umass0: vendor 0x1005 USB FLASH DRIVE, rev 2.00/1.00, addr 2
 > > > da0 at umass-sim0 bus 0 target 0 lun 0
 > > > da0: < USB FLASH DRIVE 34CH> Removable Direct Access SCSI-0 device
 > > > da0: 40.000MB/s transfers
 > > > da0: 3936MB (8060928 512 byte sectors: 255H 63S/T 501C)
 > > > 
 > > > Writing to this device is very slooooow.
 > > > 
 > > > Time taken to copy file of 1,4G is near 30 min.
 > > 
 > > Did you try it under Windows? How time does it spend?
 > 
 > You may laugh but I have no Windows-based boxes with USB 2.0... :)
 > Whatever it seems that this Apacer flash drive under Windows and USB 1.0 
 > is faster than under FreeBSD and USB 2.0...
 > 
 > Soon I will have a possibility to compare Apacer 4GB with Transcend 
 > flash. I'll report detailed results here.

Are you sure that your USB device supports hi-speed?
Being USB 2.0 has _no_ meaning at all.  Some cheap
USB sticks support only full-speed, even though they
are compliant with USB 2.0.  Please check the manual
or data sheet of your device to verify that it really
supports hi-speed (or check with a different OS such
as Windows).

You wrote that 1.4 GB take almost 30 minutes.  That's
roughly 7 Mbit/s, which sounds quite reasonable for
a full-speed device (raw speed 12 Mbit/s).

Best regards
   Oliver

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