Hello danbrown1888, Your setup is not correct.  What you need to do is to setup each nic on a different vswitch and give each one a different so subnet to go with different subnets for each  iSCSI ports from the MD3200i.  with only having 1 port that is why your data store is changing paths & doesn’t want to change back.  Here is a link to our deployment guide & if you look on page 34 there is a worksheet that helps you setup the connections correctly.  ftp://ftp.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_powervault/powervault-md3200i_Deployment%20Guide_en-us.pdf Once that is done then you should be good and shouldn’t have any other issues with not being able to connect to your data store. Please let us know if you have any other questions.
I have a Dell MD3200 series SAN that I'm using for DR.  I've been having some trouble lately running offsite replications to it with Veeam and it appears to be a problem with the SAN.  I'm not able to browse the datastores that were setup on it in VMware (times out).  I'm using VMware ESX 5.1 and backing up with Veeam from my main site to the DR site.  When I check the PowerVault storage manager for problems there is only one error: Virtual Disk Not On Preferred Path I have the results from the Support Information utility which I can post if needed.  I'm not very familiar with this SAN and would very much appreciate any assistance.
Virtual Disk not on preferred path due to failover - MD3200