I've been reading up on transitioning my SBS 2011 server to a 2012 R2 Essentials server. I found one article that suggests that in a virtualized AD server, one should not store the Active Directory database (NTDS) onto the system drive. The article doesn't site any reason why.
Warning: If you are deploying this server as a virtual machine, it is recommended that you store the AD database & SYSVOL files on a non-system volume (e.g. E:\ instead of C:). 1
Is this in fact the recommendation? If it was at some point is it relevant today? My Hyper-V host is Hyper-V Server 2012 R2, and SBS 2011 is already running as a virtual.