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RAID-6 doesn't REQUIRE 4 drives. There's just an assumption that if you only had 3 you'd pick *something else* because of the overhead of RAID-6. In general if you only had 3-drives you'd probably go with RAID-4 for the same reason, although the overhead of RAID-DP vs. RAID-4 is significantly lower than RAID-1/RAID-5 vs. RAID-6.
1 gru 2016 · With regular RAID6, the parity information is striped over all disks in the RAID set, just like with RAID5. With RAID-DP, the parity information is kept on dedicated drives, one for the "normal" parity information, and one for the "diagonal" parity information.
The performance difference between RAID-6 and RAID-5 is the performance of writing on six drives instead of seven, so RAID-6 is about 87% the speed of RAID-5 for arrays of the same number of drives (assuming RAID-6 has two drives for redundancy - really, you can have as many as you want).
Is there any general consensus on when one should switch from RAID 5 to RAID 6? For example with a 6 disk array, would the majority recommend going…
RAID 1 and RAID 6 are both types of redundant array of independent disks (RAID) configurations that provide data protection against drive failures. RAID 1, also known as mirroring, duplicates data across two or more drives, ensuring that if one drive fails, the data is still accessible on the other drive.
Either RAID-DP or RAID-TEC is the default RAID policy for all new local tiers (aggregates). The RAID policy determines the parity protection you have in the event of a disk failure. RAID-DP provides double-parity protection in the event of a single or double disk failure.
9 lip 2009 · I have a hand-me-down server that I'm setting up at home and it's got 6 72Gb hard disks (as well as 2 18Gb drives that I'm using for the OS). What is the best way to configure those 6 drives? Should I RAID 5 or 6, or go with something simpler, like mirroring?
