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Comment by dusted | Hacker News Reader

This, SSD failure modes are scary! Even enterprise SSDs will just go from "all ok" to "no device connected" at any random time.

So far, most of the HDDs I've seen fail, gave _some_ indication prior to it, via smart or "strange" behaviour.

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Anecdata is interesting. Here's mine, I've recently had a spate of a few Dell system 3-5 years old getting progressively more sluggish. Quick tests don't turn up issues. When I'm given the time required I use the hard drive manufacturer's testing utility and do thorough testing at which point damaged sectors start to turn up, not too many but enough to cause seek issues or something. I use chkdsk to attempt to recover data and mark the problematic sectors and at least for a while the system are a bit better. Of course, as soon as possible replacements are needed.

Which is weird because the only microSD card I've ever had fail on me locked itself into write-protect mode, allowing me to get my data. I wonder why SSDs don't do the same.

They're supposed to, and I've heard anecdotes that they sometimes do, but it seems like many of the failures I've experienced were firmware failures (in some cases, upgrading firmware on remaining drives seemed to result in lower failure rates anyway). Firmware failures have no rules; spinner drives sometimes have them too, and they might disappear from the bus as well, although usually those will "just" disappear after a reboot, not in the middle of a request.

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