I just tried an iSCSI connection to a NetAPP filer. I first tried using CentOS-4.2, but the iscsi initiator would not work. Using the command iscsi-ls would not show anything. Without spending too much time trying to figure out why, I tried from a CentOS-3 box. Connecting from the CentOS-3 box worked without a problem the first time. I will try further to get the CentOS-4 box to connect, but for starters the CentOS-3 box connection is stable and fast. I have also bonded two one gig NIC's on both the Filer, and the client, and have a separate iSCSI VLAN. I still have yet to do any benchmarking, but initially things seem ok.