Todd -
I have been experiencing some strange performance problems in the v6 beta cluster/failover setup I have. They are both Dell PE2950's with 2 PERC controlelrs and an MD1000 attached.
I am including a link to download the logs for both servers as well as a visio drawing of what I have setup (I could type it all out, but I work better with pictures ). What I am seeing is very sluggish virtual machines at no specific time or reason during the day. Currently I have 4 x ESXi 4 (vSphere 4) which are Dell 1950's with 4 NICS (2 for iscsi vmotion, and 2 for data). Each ESX server has roughly 6-7 virtual machines running on it. There is nothing very disk intensive at this time, just a Blackberry Enterprise server, Exchange front end, Windows update server, and other misc Windows 2003 and Linux servers and all SQL-based applications connect to a dedicated physical SQL 2005 server.
If you could take a peek at the logs and let me know if you see anything, that would be great. Maybe you can spot something I can't. The ESX servers are not dropping the iSCSI connections, the virtual machines just run very slow at times and sometimes temporarily freeze for a couple seconds.
If there is any other info you need, please let me know.