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by sekh60
1329 days ago
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I am not familiar at all with Backblaze's storage software, but I am fairly familiar with Ceph. You are not going to get 6Gbps out of a spinner. Maybe, 1.5 or 2, if it is a fairly fast drive and the data is all sequential. Plus I believe they uses SAS expanders, not multiple HBAs, so the 6Gbps bus is divided further. So they probably can saturate maybe half the drives at a time, if not more, given their bandwidth. They would probably keep them spinning, spin up is pretty power intensive, and it is physically hard on the drives. |
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