Disk mirroring, also known as RAID 1, is the replication of data to two or more disks. Disk mirroring is a good choice for applications that require high performance and high availability, such as transactional applications, email and operating systems.
Why should I use RAID 1?
When is RAID 1 used? Combining hard disks in a RAID 1 is always worthwhile when one requires high availability of their stored data. Since the storage of these redundant arrays is relatively expensive, they are not suitable for backing up large amounts of data.
Where would RAID 1 be used?
Ideal use. RAID-1 is ideal for mission critical storage, for instance for accounting systems. It is also suitable for small servers in which only two data drives will be used.
When should you use a RAID 0 vs a RAID 1 Why?
Disadvantages of RAID 1\n\n Uses only half of the storage capacity. More expensive (needs twice as many drivers). Requires powering down your computer to replace failed drive.