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Thread: SSD Write Endurance 25nm Vs 34nm

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  1. #11
    Xtreme Mentor
    Join Date
    Feb 2009
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    2,597
    Here is a graph that shows the relationship between WRD (B1) & MWI (E7) for each of the SF drives being tested (excluding Vapor’s as there is not enough info). Anvil’s drive is holding up significantly better than SynbiosVyse & Christopher’s drives.

    On SynbiosVyse’s drive the B1 value is more or less a perfect inverse of E7. I don’t know what NAND is being used in each drive, but it looks like SynbiosVyse & Christopher have NAND with 3K P/E specs and Anvil has 5K. It looks like the “disconnects” that Christopher experienced allowed better wear levelling, which has decreased the MWI burn out rate in comparison to SynbiosVyse's drive.

    I can’t help think that SynbiosVyse’s drive failed due to the difference between least and most worn blocks, which resulted in an insufficient reserve block count. I think that is why the drive failed, but why, with hardly any static data, was SynbiosVyse’s drive unable to level out the wear.

    @ Anvil, a summary in the first post of each drive being tested along with the NAND P/E specs would be really helpful. Also keys findings and calculation methods would be great.

    SynbiosVyse WRD (B1) & MWI (E7)
    Click image for larger version. 

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    Anvil/SynbiosVyse/ Christopher
    Click image for larger version. 

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    Last edited by Ao1; 10-13-2011 at 11:46 PM. Reason: updated chart

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