SSD Write Endurance 25nm Vs 34nm

[Ao1]

Here is a quick summary of drives with good SMART info. I’m going to guess that the P/E count for the Chronus was 3K not 5K giving a WA factor of 0.85, which seems more logical considering 46% compression was used.

M4 64 GB (25nm) = 176,128 – 64*3000 = 320000/ = 1.09 (or 1.8 with 5K P/E)
Intel X25-M G1 80 GB (50nm) = 150,528 – 80*10,000 = 800000/150528 = 5.31 (No TRIM)
Intel 320 40 GB 25nm = 194,560 - 40*5000 = 200,000/ 194,560 = 1.03
C300 64 GB (34nm) = 301,056 - 64*5000 = 320,000/301056 = 1.06
Chronos 60 GB (32nm) = 218,112 – 60*5000 = 300000/218112 = 1.37 (or 0.85 with 3K P/E) (46% compression)
Intel 520 60 GB = 429056– 60*5000 = 300000/429056= 0.69 (46% compression)
Intel X25-V 40GB = 187,627 – 40*5000 = 200000/187,627 = 1.06


Edit:

WA for the Intel 320 is slightly lower than the X25-V as expected, but getting any lower without compression must be close to impossible, so as 1,000s of P/E cycles disappear with every reduction in NAND geometry there is no way of avoiding a reduced life span.