After reading a ton of posts, it would appear this thing is in a "boot loop". When plugged in, the iPod shows it is in recovery mode (USB and iTunes symbol). Itunes says it must be restored, blah, blah, blah...I've gone through the process about 10 times. The status bar on the iPod appears but never shows any progress and thats about when it reboots, disappears from iTunes and the error box with the same error - "9".
I've already read the absolutely useless check-your-USB - diasable your security software BS...and yes even tried it. Nada.
This error occurs when the device unexpectedly loses its USB connection with iTunes. This can occur if the device is manually disconnected during the restore process. This issue can be resolved by performing USB troubleshooting, using a different USB dock-connector cable, trying another USB port, restoring on another computer, or by eliminating conflicts from third-party security software.
Did you try everything above, including trying on another computer? If so then
Make an appointment at the Genius Bar of an Apple store.