iPod trouble

does it mount at all though? have you tried it on another computer and if so did that do the same thing?

 

From the Apple website support site:

These icons all relate to built-in diagnostic software that checks the hard disk for damage and tries to repair it if necessary. The checkmark indicates all is well with your iPod.

A diagnostics test is being performed on your iPod. Nothing is wrong. My 2G iPod does it occasionally as well. It's simply a self-check test.

 

It's doing a hardrive check... this is pretty normal... just plug it in to the power and let it go through the motions.

The iPod has this check if it thinks somethign is wrong, it'll let you know if its broke etc. It should happen ever so often, mine does it about once every three months. If this is the case with you its nothing to worry about.

If it is happening everytime then its something to worry about and you might want to contact apple.