Hard-Drives

Every drive you own is going to fail eventually. The part that catches people off guard is when. Hard drive failure rates don’t sit flat over a drive’s life, they follow what’s usually called a bathtub curve: a spike of early failures right out of the gate, a long flat stretch of low failure rate through the drive’s useful life, and a rising tail of wear-related failures years later. Burn-in testing exists to deal with that first spike, on your terms, before the drive is holding data you care about. ...

Shucking, buying an external USB hard drive purely to crack it open and pull out the bare drive inside, has been a data hoarder rite of passage for over a decade. Drive manufacturers have spent that whole decade trying to make it less appealing, and yet it keeps coming back every time there’s a good external-drive sale. Here’s whether it still makes sense, and what you’re actually signing up for when you do it. ...

Somewhere in every data hoarder’s history there’s a drive that seemed like a great deal, went into an array without a second thought, and then turned a routine rebuild into a multi-day nightmare or a dropped drive. Almost every time, the actual cause is the same three letters: SMR. This isn’t an obscure edge case. It’s happened at scale, publicly, more than once - manufacturers quietly shipping SMR drives in product lines everyone assumed were CMR, and the data hoarding and NAS communities finding out the hard way when arrays started misbehaving. If you’re buying drives for a NAS, a ZFS pool, or any kind of RAID array, this is one of the few things worth actually understanding before you buy, not after. ...