RAID 1

A RAID 1 (mirroring) is the combination of at least two hard drives in the RAID in which all data is stored on all implemented hard drives. Each hard disk has the identical (mirrored) data stock and thus a redundancy of the data. In a RAID 1 system, the total capacity of the available storage space depends on the smallest hard disk in the network.

RAID 1 systems with two hard disks are nowadays often found in the form of affordable network attached storages (NAS) in small businesses and private households.