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Raid 5 gives up one hard drives worth of space and can survive the loss of one drive. You can go with raid 6, which will tolerate two drives dying, but it comes
by ashtonkem 5y ago
Raid 5 gives up one hard drives worth of space and can survive the loss of one drive. You can go with raid 6, which will tolerate two drives dying, but it comes at the cost of giving up two drives worth of space.
- hinkley 5y agoAs you add more drives, the odds of failure go up. It’s N drives all playing Russian roulette independently. With enough drives even raid 6 is not enough. People use RAID 10 because single drive failures are cheap to replace (you copy one disk to another) you can survive some two drive failures, and the logical arrangement is simpler - it’s just stripes where each stripe member has a duplicate.
- Scoundreller 5y agoI wonder if it increases the probability of drives dying. When you connect multiple similar devices together mechanically, their vibrations can sum catastrophically. Ah, it’s mechanical resonance I’m thinking of.