A section in the TechNet article Best Practices for Operational Excellence (SharePoint Server 2010) states the following:
Separate system components into logical drives and use RAID for redundancy.Components on drive Recommended RAID level Windows and program files drive RAID 1 Operating system swap drive and temp directory RAID 1 Log files RAID 1 Boot disk for imaging and RAID 1 Windows Desktop Search (optional)Use at least four physical disks and use separate disks to keep the log files and swap drive separate from the Windows and program files drive.
If I wanted to build one server according to this advice, what would it actually look like? When it says "use at least 4 disks" for RAID, then am I looking at getting 16 disks? Or is this saying the underlying physical structure should be 4 disks, and I should create logical drives on top of that RAID structure?
Lastly, how would this advice translate to a virtual environment?