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WD unveils new high-capacity 32TB SMR and 26TB CMR disk drives(www.techspot.com)

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catloaf@lemm.ee
8 points

That’s a pretty common failure scenario in SANs. If you buy a bunch of drives, they’re almost guaranteed to come from the same batch, meaning they’re likely to fail around the same time. The extra load of a rebuild can kill drives that are already close to failure.

Which is why SANs have hot spares that can be allocated instantly on failure. And you should use a RAID level with enough redundancy to meet your reliability needs. And RAID is not backup, you should have backups too.

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kalleboo@lemmy.world
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Also why you need to schedule periodical parity scrubs, then the “extra load of a rebuild” is exercised regularly so weak drives will be found long before a rebuild is needed.

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