OpenFiler SAN software
I have been working on an eBook for LeftHand Networks for the past few months. The title is The Shortcut Guide to Exchange Server 2007 Storage Systems and it has been very interesting to work on. The first two chapters are available and it is free to download. In chapter 3 and 4, I had to have a iSCSI SAN running in my lab at home for some screen captures and testing. Unfortunately, I spent most of the last 3 months traveling, so I had to be able to take it with me, too.
Thanks to Juergen Hasslauer from HP for pointing me in the direction of OpenFiler! OpenFiler has a VMWare based machine you can download and this makes an excellent testing and lab environment. While the terminology is a bit different than I am used to dealing with (since I work with LeftHand, NetApp, and EMC SANs mostly), I had more fun than a geek should be allowed to have.
OpenFiler can act as a NAS (for CIFS/SMB and NFS clients) as well as an iSCSI SAN. I had a ton of fun just getting it configured and playing around with different configurations. Many of the features are just as powerful as SANs that you pay tons of money for including snapshot features! If you are looking for a simple (and free) solution for learning iSCSI, SAN, and NAS technology, give it a try.