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RAID 10
RAID 10 is a hybrid of RAID 0 and RAID 1. This configuration is known as a striped mirrored array.
See the illustration below for a graphical representation of RAID 10.
RAID 5
RAID 5 – (block-level striping with distributed parity) distributes parity along with the data and
requires all drives but one to be present to operate; drive failure requires replacement, but the array
is not destroyed by a single drive failure. Upon drive failure, any subsequent reads can be calculated
from the distributed parity such that the drive failure is masked from the end user. The array will have
data loss in the event of a second drive failure and is vulnerable until the data that was on the failed
drive is rebuilt onto a replacement drive. A single drive failure in the set will result in reduced
performance of the entire set until the failed drive has been replaced and rebuilt. This configuration
demonstrates best performance for read operations while write operations are slower than other
RAID configurations.
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