But if you want to test failover clustering….
Standard SCSI based clustering will no longer work (yes I tested it, no go).
Rocket Division StarWind will be the product you want to use to test Failover Clustering. http://www.rocketdivision.com/wind.html You will have to wait until the June 2007 time frame while they make it work with Beta 3.
FalconStor iSCSI Storage Server http://www.falconstor.com/en/solutions/?pg=Products&sb=iSCSI I am not sure when they will support it.
Microsoft bought StringBean (http://www.stringbeansoftware.com/downloads_update2_0.asp) which has a great WinTarget program. The program is now part of Windows Unified Data Storage Server and it called Microsoft iSCSI Software Target. That one works today, if you are lucky enough to have a copy.