I'm trying to find the best way to do this and wanted to get input from others before starting.
I'm setting up a new mailbox server for all of our archive email accounts.
We've done some rough estimating and determined that at this point in time we'll need about 15TB to cover next 2-3 years worth of archives.
The server will be a virtual machine in vSphere 4.1 environment.

I've got the 15TB set aside already. The only way I'm seeing to get all 15TB into a single volume on a VMWare virtual machine would be to mount it inside the guest OS. I know NFS isn't supported so I was looking at iSCSI.
Has anyone done such a setup before? Would this be the correct way to go about it or is there a better solution?