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Thread: SSD Write Endurance 25nm Vs 34nm

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  1. #11
    Xtreme X.I.P.
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    @john
    It should be very similar but there are a few new feature in the 320 series that could make a small difference.

    Snipped from TechReport
    "The Intel 320 Series protects against any data loss that might occur in this situation by employing "surplus data arrays." Also referred to as XOR—the logical operation often used to calculate parity bits for RAID arrays—this redundancy scheme is capable of recovering data from a failed bit, block, or even an entire failed die. Intel describes XOR as a NAND-level RAID 4, making it sound rather similar to the RAISE technology employed by SandForce controllers.

    RAISE is described as more of a RAID 5 than a RAID 4, though. SandForce says RAISE spreads redundancy data across the entire drive, and that the storage capacity lost amounts to the capacity of one flash die.
    Intel isn't specific about the amount of storage consumed by XOR, but it does say the redundancy data is rolled into the 7% of total flash capacity reserved for use by the controller. According to Intel, XOR is governed by a mix of hardware and firmware that doesn't introduce any performance-sapping overhead. The only time it'll slow the drive down is when data is being recovered in the event of a flash failure."

    So, redundancy without overhead?
    Last edited by Anvil; 05-23-2011 at 11:58 AM.
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