Build Your Own Linux Test Server, Setting Up Storage

“The biggest question you must answer before buying a bunch of
disks is how you plan to use the machine. If you plan on using it
as a virtual machine host, you will definitely benefit from having
enough hard disks to configure using RAID (redundant array of
independent disks) for speed and redundancy.

“The most efficient configuration for this application is by far
RAID 5. You get both speed (data striping) and error correction
(distributed parity) benefits while reducing capacity, at least in
our particular configuration, down to three drives out of four.

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