My suspicion is that the 5 mbps going outbound plus the 8 aolservers are chewing up the cpu out of the one box. the box only has 4gb of memory and the sga is about 1.4 gigs. So moving the aolservers off to a front end box ought to help somewhat.
raid 10 is also very expensive and
for ACS for photo.net which is much more reads than it is writes it is unclear to me why raid5 might not work out well.
