We are running 6.1.0-402 with 10 3.9TB nodes along with vcenter intergration.  I have a large "File" server (VM) that is about 5TB in size. I chose to backup the system from the Windows level using the agent due to its size.  This is going fairly well after some tweeking but does take a long time to backup nightly.  This got me thinking about restoration times in the event of a disaster.  This server would take forever to restore!

Would it be a good idea to split the server up into smaller servers? If we do this, is it better to perform image level backups?  Are restores faster with FLR?

Do I have any other choices?

Thank you in advance.