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If you've got 1,000 drives, a 99.5% or 98.5% success rate doesn't matter so much - you're going to be replacing a drives anyways. If you have 2 or 4 drives, div
by LeifCarrotson 7y ago
If you've got 1,000 drives, a 99.5% or 98.5% success rate doesn't matter so much - you're going to be replacing a drives anyways. If you have 2 or 4 drives, dividing the probability that you have to replace any drives at all by a third is a big deal.
- pedrocr 7y agoI'd say completely the opposite. If you're operating at Backblaze scale doubling your operations workload can be expensive. If you're at home doubling or tripling your chance of having to do some maintenance for an hour a year is trivial compared to the benefit of significantly reducing the chance that your whole array will fail from a common fault of all drives.