I haven't done any of that, but I can tell you the maximum volume my SATA adapter can take is 2 gb. Does your controller have built-in RAID, such that you could strap two drives as a single volume?
If I understand you correctly, iTunes is syncing to the ATV in its default mode - putting the newest stuff on until it's full. You can manage that in iTunes by clicking on the ATV and setting the various options on the tabs.
If I understand you correctly, iTunes is syncing to the ATV in its default mode - putting the newest stuff on until it's full. You can manage that in iTunes by clicking on the ATV and setting the various options on the tabs.