RAID reduces storage capacity, especially with RAID 1 mirroring. RAID requires additional drives and costs but isn't a substitute for backups. A redundant array of inexpensive disks (RAID ...

Hard Drive Mirroring sits at RAID-1 on the standard RAID (Redundant Array of Independent Disks) levels, where an exact and reliable copy of data is kept on two or more disks. Once mirroring is ...