iSCSI is a network storage protocol that allows sending and receiving of SCSI commands over a TCP/IP network. This allows you to leverage Ethernet, a low cost network medium to get SAN performance and network based storage. While you can use pretty much any Ethernet switch, I’d recommend that if you’re going to use iSCSI that you dedicate a switch to it, or use quality switches and build a dedicated VLAN for your iSCSI traffic. Recently, I’ve recently been seeing a lot of traffic about whether or not you can use iSCSI with Mac OS X. The answer, yes. As with Xsan, to get started with iSCSI you’ll need an…