I have a new vsphere 5 environment comprising of 3 esxi5 nodes and will be getting a new 45 tb EMC SAN soon. Sorry I don't have much info about SAN. All I have been told is that we will have mix of fc and sata drives but due to SSDs performance will be same across all 11 TB that I will get for my VMware. I will need to migrate about 70 VMs from current 4.1 live cluster. VMs are a mix generally 2003/2008 app/web/exchange servers with no exceptional requirements. No file servers as well. Its difficult to group my current vms based on their performance requirements.Would someone be able to advice how many VMFS Luns I should go for and what size?