SSD Write Endurance 25nm Vs 34nm

[Ao1]

This 320 does not seem to care that it has no reserve space left. Still going strong...

502.35TB. 5588 reallocated sectors. Reserve space at 1.

Assuming 1.1 WA & 1.1 WL the P/E cycle count works out @ 15,560

15,560 = (514,406) * (1.1) * (1.1) / (40)

[Ao1]

I found this formula for calculating life time.

SSD Life (in seconds) =
(P/E Cycle) x (Capacity)
(Write Speed) x (Duty Cycle) x (Read/ Write Ratio) x (Write Amplification)

There is a field test that Emphase have put together that seems to utilise elements of that formula. It requires DiskMon & Iometer to calculate the workload variables, but it’s quite easy to then plug numbers into the Xcel worksheet that is provided.

I only ran Anvils app for one cycle, which included generating the test file. Using data obtained from DiskMon and Iometer the Xcel file calculated a life time of 0.08 months. I’m not sure why the % random come out so high, perhaps it was because I only ran one cycle. I’d guess that is why the calculated lifetime is so low. I’m not sure how WA & WL are factored, but it should be possible to tweak the formulas based on the results of the testing in this thread. (A bit beyond me though )