Sandforce Life Time Throttling

[johnw]

We saw with the Vertex 2 40GB it was writing at ~6.25MiB/sec with LTT, which works out to ~11 P/E cycles a day (with just a WA of 1.00x, which we deduced is too optimistic for 100% incompressible data). A three year warranty at that rate would work out to ~12,000 P/E cycles, which is what I was getting at when I said "LTT functioning isn't quite faithful to its intention"....it's intention to drag the life of the drive out to the end of the warranty period, but 12,000 P/E cycles is 2.4x what the NAND is rated at and seems optimistic for a warranty.

How did you determine that the SSD in question was set for a 3 year warranty and not a 1 year warranty?

By the way, I'm not sure what you are disagreeing with about the sawtooth implementation of throttling. I did NOT say that the average write speed would be less (or more) than the warranty slope. I guess you got confused by the statement that the slope of the the throttled part of the sawtooth is less than the warranty line slope. That is self-evidently true. But that proves nothing about the average write speed of the SSD, since it depends on the slope of both portions of the sawtooth, as well as the length of each edge of the teeth.