MSI RX480 Neo2 MS-7151 - Disk Mirroring (RAID 1

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ATI SATA RAID Setup Guide
Disk Mirroring (RAID 1)
Disk mirroring creates an identical twin for a selected disk by having the data simul-
taneously written to two disks. This redundancy provides protection from a single
disk failure. If a read failure occurs on one drive, the system reads the data from the
other drive.