Overview: Redundancy and pooling
Redundancy and pooling organize physical capacity and reconstruction information under a selected storage layout.
Pooling presents managed capacity, while mirroring or parity can add a particular failure tolerance. The layout determines which surviving information is required after a device loss. These pages explain that structure and its capacity implications before a large logical volume is assumed to contain independent recovery copies.
RAID
RAID combines drives in a layout that can provide particular failure tolerance, capacity and I/O behavior for a media server.Storage pooling
Storage pooling presents capacity from several devices through logical storage, while allocation and redundancy remain separate choices.Parity protection
Parity stores reconstruction information that can recover specified missing data, provided the remaining blocks and parity describe a consistent generation.