On: The SSD Endurance Experiment: Two petabytes

[_DadeMurphy]

Where did you see that the 840 is still going error-free? It says that the 840 maxed out it's reallocated sectors at around 900TB and veered into a ditch right before the petabyte threshold.

It'd be interesting to run these same tests on enterprise grade drives as well.

Edit: You meant that the 840 Pro is still going, I see.

[buryat → _DadeMurphy]

840 has TLC, 840 Pro MLC

TLC cells should sustain 1-1.5K Program-Erase cycles

MLC 3-5K P/E cycles

eMLC 10-30K P/E cycles

SLC >100K

256GB eMLC SSD with 10K PE should be able to sustain 2.56PBW, which is pretty much what the 840 Pro 256GB with MLC was able to sustain in the test.

Also enterprise ssds usually come with huge overprovisioning, a raw 1TB drive usually comes with 800G usable space.

I had few 720G fusion iodrives with 1.1PBW and 0 reallocated sectors, and these were rated 10PBW.

[JohnTHaller → _DadeMurphy]

I think so, yeah. That's one of the reasons I paid a bit extra to put an 840 Pro in my main development box.

[pja → _DadeMurphy]

Yeah: the 840 died but the 840 Pro is still going.