SSD Write Endurance 25nm Vs 34nm

[johnw]

64GiB * P/E Cycles (189) = 12,096
Actual writes = 1,056
WA = 11.45
MWI (?) 94

Aha, WA going up. I wonder what it will stabilize at. It would be interesting to try this:

1) power-cycle the SSD and then note the raw values of attributes 177 and 241, call them r177a and r241a

2) run ASU endurance writes for a while, a day or two, note the ASU bytes written at the beginning and end of the period

3) power-cycle the SSD and check attributes 177 and 241 again, call it r177b and r241b

4) verify that the ASU bytes written = 512 x (r241b - r241a)

5) compute the WA = 64 x 1024^3 x (r177b - r177a) / ( 512 x ( r241b - r241a ) )

By the way, what QD does ASU Enterprise endurance benchmark use for its full-span 4KiB random writes? I suppose QD does not matter much for the 4KiB random write speed on the Samsung 830, but for some SSDs (like the m4 or Performance Pro), the write speed increases quite a bit with higher QD.