RAID 1 and RAID 1+0 (RAID 10)RAID 1 and RAID 1+0 (RAID 10)
In RAID 1 and RAID 1+0 (RAID 10) configurations, data is duplicated to a second drive. The usable capacity is C x (n / 2) where C is the
drive capacity with n drives in the array. A minimum of two drives is required.
When the array contains only two physical drives, the fault-tolerance method is known as RAID 1.
The maximum number of drives supported for RAID 1 is 32.
When the array has more than two physical drives, drives are mirrored in pairs, and the fault-tolerance method is known as RAID 1+0 or
RAID 10. If a physical drive fails, the remaining drive in the mirrored pair can still provide all the necessary data. Several drives in the
array can fail without incurring data loss, as long as no two failed drives belong to the same mirrored pair. The total drive count must
increment by 2 drives. A minimum of four drives is required.
The maximum number of drives supported for RAID 10 is 32.
This method has the following benefits:
It is useful when high performance and data protection are more important than usable capacity.
This method has the highest write performance of any fault-tolerant configuration.
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