I have a single domain running in windows 2003 AD, theres only one site, one subnet, etc
I currently have two domain controllers, the first is running all roles and both have the Global Catalog.
Both servers are fairly old now and eventually the hardware will be replaced, however in these lean times I am battling to get the budget for two new servers.
I was thinking in the interim that I might run one or two virtual DCs in Hyper-V just to act as backups not to replace these DCs. I've read up on all the warnings etc re virtual DCs, was just thinking in the event of a failure of one of the physical DCs I'd have a little extra security whilst resolving the issue.
My questions are really
is it worth moving some/any of the operations masters off od DC1 or am I creating risk for no gain?
Is the loss of one role as bad as losing them all?
If I lose it completely am I completely screwed?
If it is worth moving them how should they be placed?
Is it worth having a copy of the GC on the Virtual DCs?