Extremely slow USB to USB transfer

[mk01]

this we need to put on wiki as well.

mostly this is caused by default XBian setup to mount external media with "sync" mount option. this provides additional layer of filesystem protection as it avoids corruptions if the USB is removed without proper UNMOUNT before, but other side of story is speed (and much faster wear out for USB sticks / SD cards).

150kbps sound like this exactly.

I don't which version we are talking about, with Beta2 you can change this in xbian-config under xbmc, if Beta1X check /etc/usbmount/usbmount.conf for mount options and change "sync" to "async" where you find it.

then reboot. drives will be re-mounted with new params and transfers should be better. You should be able to write to USB via network let's say at sustained 6-7MB (if RPI is not otherwise busy) - at beginning you can peak at 10 until buffers fill up. USB - USB never tested but don't expect much higher from this as RPI's USB implementation is not the perfect one and is quite CPU consuming.

in any case it should be more acceptable than 150kbps