Poor archiving performance

Do you use a CAS array at all? Have seen it when load balances can slow things down when they're not optimized Also maybe worth checking the network and NIC configuration on the exchange servers, sometimes I've seen it where the backup nics are used Also make sure silly things like the TCP Chimney/Offload is disabled on the EV server and the exchange server May also be worth looking at the disk queues on the exchange side of things too