According to the link from the user guide below, the unit will only support 4 hosts:

http://support.dell.com/support/edocs/systems/md3000/en/1stGen/HOM/HTML/about.htm#wp1091182

Hope that helps!

Thanks for the reply Dennis. We now have 4 hosts on the MD3000, the problem is that the two Server 2008 hosts that I just connected to the vault do not see it. The original two that were connected still see it. We have one connection running from the vault to each of the 4 hosts. My question is if I need to reboot the MD3000 and all 4 hosts in order for the 2 new ones to see it. Any help would be apprecaited.

Sorry, I mis-read the question. You should not have to reboot though. Let me check with some contacts on my end and see if we can figure out what's going on.

Can you tell me if you have mapped the 2 new hosts to the MD3000? If not this can be done via MD Storage Manager (MDSM).

I think that's what I missed, I went into MDSM and found the option to map the new hosts. Thanks a lot Dennis, you've been most helpful!

Hi Dennis, I ran into another issue. Since I disconnected two of the SAS cables and connected them to the new hosts I'm not sure which HBA host port goes to which device. When I check the topology it still shows two connections to each original host. The connections show a MAC address but I'm not sure how to determine which port goes to which host so I can remove the correct ones.

Sorry, not a MAC address but a world wide identifier.