Storage Spaces is an option in Windows to group multiple drives in order to either have more capacity in a single volume or to add a layer of protection in case of a physical drive failure. Three basic modes are supported: simple, mirror, and parity.
This simple mode is basically drive spanning. There is no performance increase or redundancy, just combining drives into a larger, single volume. Should one of the drives fail, all data on it is lost - but data on the other drives in the storage space is unaffected. It requires two or more drives and is handy if you don't want to have to worry about splitting files manually across drives as they fill up and the data stored there is not mission-critical.
This simple mode is basically drive spanning. There is no performance increase or redundancy, just combining drives into a larger, single volume. Should one of the drives fail, all data on it is lost - but data on the other drives in the storage space is unaffected. It requires two or more drives and is handy if you don't want to have to worry about splitting files manually across drives as they fill up and the data stored there is not mission-critical.
Basic drive spanning - no performance increase or redundancy, just combining drives into a larger, single volume. Requires 2+ drives.
