How many disks does RAID One require?
A RAID 1 creates an exact copy (or mirror) of a set of data on two or more disks, so you need at least 2 disks. You can read this for more.
A RAID 1 creates an exact copy (or mirror) of a set of data on two or more disks, so you need at least 2 disks. You can read this for more.