Minimum Required SAN for a cluster
Posted on 2005-05-04
I work at a farily small company (around 150 users). We have three main servers that provide our core network services, DNS, DHCP, Filesharing and printing. 1 of them is a Novell 5 server that handles most of the file sharing and the other 2 run Win2003 Enterprise as DC's and do everything else. Right now the two win servers share DNS, one does DHCP and the other does Printing. We also have a small (250Gb) RAID 5 array on another member server that mostly just serves the IT dept and is the DFS root.
I want to somehow load balance the DHCP and Printing between the 2 win servers so I can take one down and have the other take over. From what I've read the best way to do this is through clustering, but that requires a SAN. We have the largely unused RAID 5 array that would be perfect but I don't know what the cheapest way to set it up on a SAN that will work with a cluster. I have no Fiber Channel experiance and if possible I would like to stay away from that because of the cost and I don't really think I need the performance. The 2 Win servers have dual gigabit NICs and I could pick up a couple pretty cheap for the RAID server. Will this work? What kind of protocols would I need? iSCSI?
If I am stuck with Fibre Channel what pieces do I need? 3 fiber channel "Network cards" I assume, but do I need a F/C switch as well or can I daisy chain them together?