3 Replies Latest reply on Nov 10, 2009 7:34 AM by Mr.Wolf

    SSD durability question


      I bought an Intel Postville G2 160GB two weeks ago and I have some questions regarding durability and threshold.


      An article in a well-known (german) techie-newspaper told, that Intel specifies a durability limit of 15 Terabytes for a 160GB SSD drive. SMART tells me, that my drive already has written 400GB off that (considering a complete fresh install of Win7 x64 on it). That means 28GB / day or if I try to compensate for the fresh install maybe 15-20GB / Day. That would lead to a durability of almost exactly 2 years (considering 20 GB writes / day).

      I'm just wondering: given a nearly perfect wear leveling algorithm, it would require a total of 1.600 Terabytes (1.6 Petabytes) written to the SSD to end its life definetely (given 10.000 write cycles per block). Let's just consider some threshold thingies here and there, threshold bla and reduce that 10k cycles to an average of 1k (!) per block, this still would lead to 160 Terabytes writes being left. Considering my 20 GB/ day, my SSD would be finde for at least 21 years.


      Furtheron: let's say, the wear leveling algorithm would NOT re-write existing data due to a "maximum" of wear leveling, so that only free space is available for wear leveling. Let's say, there are only 20% of free space at each time given. that still would lead to 4 years instead of 2.


      So this is my question: what durability of my ssd is a realistic guess? Is there any official statement on SSD durability by intel?