Hi experts, currently I have an IBM DS3400 storage with one hugh RAID 5 volume. I have the intention to virtualized Exchange 2010 mailbox server role for DAG using vsphere 5.0. I have about 100 mailboxes. For best performance with respect to storage, should I add additional harddisks to the existing raid 5 volumes or create a totally seperate array (4 disks, RAID 5) for better performance?
Currently, on my physical Exchange 2007 server, I'm using RAID 1 for OS, RAID 5 for DB and another RAID 1 for logs. For the virtualized Exchange 2010, what do I do? Just create 3 seperate LUN from the SAN array containing RAID 5 and attached to this virtual machine? Will the performance be affected?