RAID Tips

RAID Tip 2 of 10 - The RAID Triangle

The relationship between Speed, Price, and Fault Tolerance mostly determines the RAID level to use. Of these three parameters, pick any two and you are all set.

RAID Triangle

  • Fast and Fault Tolerant - RAID 1+0;
  • Fast and Cheap, no Fault Tolerance - RAID 0;
  • Cheap and Fault Tolerant - RAID 5 or RAID 6.

It may seem that RAID 5 and RAID 6 are expensive, but as the capacity of the array and the number of disks increase, the overhead of the RAID 1+0, both in disks and in controller ports, becomes significant.

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