RAID 0+1 - Combination of RAID 0 (data striping) and RAID 1 (mirroring). Optimize for Performance and Redundancy
RAID 0+1 combines the performance of RAID 0 with the redundancy of RAID 1.
To build a RAID 0+1 array, you first build a set of RAID 1 mirrored disks and you then combine these disk sets in a RAID 0 striped array.
A RAID 0+1 array can survive the loss of one disk from each mirrored pair. RAID 0+1 cannot survive the loss of two disks in the same mirrored pair.
RAID-10 and RAID-01 are not the same thing and it does matter. RAID-01 is a mirrored configuration of two striped sets. RAID-10 is a stripe across a number of mirrored sets.
RAID-10 provides better fault resilience and "rebuild" performance than RAID-01. Both array types provide very good to excellent overall performance by combining the speed of RAID-0 with the redundancy of RAID-1 without requiring parity calculations.
|DRIVE 1||DRIVE 2||DRIVE 3||DRIVE 4|
|Data A||Data A||mA||mA|
|Data B||Data B||mB||mB|
|Data C||Data C||mC||mC|
|Original Data||Original Data||Mirrored Data||Mirrored Data|
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