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VTrak M310p, M210p Product Manual
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RAID 6 – Block and Double Parity Stripe
RAID level 6 stores dual parity data is rotated across the physical drives along
with the block data. A RAID 6 disk logical drive can continue to accept I/O
requests when any two physical drives fail.
with the block data. A RAID 6 disk logical drive can continue to accept I/O
requests when any two physical drives fail.
The total capacity of a RAID 6 disk logical drive is the smallest physical drive
times the number of physical drives, minus two.
times the number of physical drives, minus two.
Hence, a RAID 6 disk logical drive with (7) 100 GB hard drives will have a
capacity of 500 GB. A disk logical drive with (4) 100 GB hard drives will have a
capacity of 200GB.
capacity of 500 GB. A disk logical drive with (4) 100 GB hard drives will have a
capacity of 200GB.
RAID 6 becomes more capacity efficient in terms of physical drives as the
number of physical drives increases.
number of physical drives increases.
RAID 6 offers double fault tolerance. Your logical drive remains available when
up to two physical drives fail.
up to two physical drives fail.
RAID 6 is generally considered to be the safest RAID level.
RAID 6 requires a minimum of four physical drives.
Double Distributed (P and Q) Parity
physical drives
Data
Blocks