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Hard drives are very nearly dead for hot storage. I expect them to by wholly dead by the end of 2020 because the TCO of HDDs is going to outstrip that of SSDs
by TheOperator 7y ago
Hard drives are very nearly dead for hot storage. I expect them to by wholly dead by the end of 2020 because the TCO of HDDs is going to outstrip that of SSDs because of the fundamentally lower reliability.
- mjevans 7y agoMy personal, offhand, experience is that SSDs tend to fail about 2 or 3 times sooner than a hard disk. I'd need for SSDs to actually be CHEAPER per gigabyte for the trade-off in expected lifetime to make sense. PS: If your hard drives 'fail' try scrubbing (forced re-write) them every 2 years or so...
- jschwartzi 7y agoYou'll need to do this with NAND-based devices as well, as NAND tends to lose data integrity as data is repeatedly read out.
- gruez 7y ago>as NAND tends to lose data integrity as data is repeatedly read out This doesn't tend to be an issue because the controller can automatically rewrite the cells as needed. What is an issue is if you leave the SSD unpowered for a few months and the cells leak enough charge to be unreadable.
- mjevans 7y agoI suspect most SSD firmware actually does automatic old-age scrubbing of somekind within the firmware. This theory seems likely confirmed with your offline decay theory.
- PhantomGremlin 7y agoMy personal, offhand, experience is that SSDs tend to fail about 2 or 3 times sooner than a hard disk. My anecdotal experience matches yours. In addition, SSDs often fail catastrophically. Total loss of data, not just some bad sectors. They're worse than hard disks in that regard.
- TheOperator 7y agoThe failure rates for SSDs I've seen when I've seen them compared to HDDs are lower. So long as you aren't using QLC in certain servers. Although there is indeed less warning of impending failure. Use case also seems important as HDDs are relatively adversely affected by mobile usage.