RAID 1
Keywords: Nytro SW UG

> RAID 1

> In RAID 1, the Nytro controller card duplicates all data from one drive to a second drive in the drive group. RAID 1 supports an even number of drives from 2 through 8 in a single span. RAID 1 provides complete data redundancy, but at the cost of doubling the required data storage capacity. The following table provides an overview of RAID 1. The following figure provides a graphic example of a RAID 1 drive group.

> Table 2. RAID 1 Overview

> Uses | Use RAID 1 for small databases or any other environment that requires fault tolerance but small capacity.
> Strong points | Provides complete data redundancy. RAID 1 is ideal for any application that requires fault tolerance and minimal capacity.
> Weak points | Requires twice as many drives. Performance is impaired during drive rebuilds.
> Drives | 2 through 8 (must be an even number of drives)

> Figure 3. RAID 1 Drive Group

DB15-001059-00-April 2013
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