Configuring the hardware and installing an operating system
and user data on the other drives in the array. The usable capacity is C x (n - 1) where C is the drive capacity with n drives in
the array. A minimum of three drives is required.
This method has the following benefits:
•
It is useful when usable capacity, write performance, and data protection are equally important.
•
It has the highest usable capacity of any fault-tolerant configuration.
•
Data is not lost if one physical drive fails.
RAID 50
RAID 50 is a nested RAID method in which the constituent drives are organized into several identical RAID 5 logical drive
sets (parity groups). The smallest possible RAID 50 configuration has six drives organized into two parity groups of three
drives each.
For any given number of drives, data loss is least likely to occur when the drives are arranged into the configuration that
has the largest possible number of parity groups. For example, four parity groups of three drives are more secure than
three parity groups of four drives. However, less data can be stored on the array with the larger number of parity groups.
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