over-provisioning

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    Over-provisioning in SSDs is a method of maintaining SSD performance and increasing SSD endurance by either allocating a portion of NAND to be used as “swap space” when the drive is at capacity or as a replacement for degraded NAND cells.

    Currently, consumer SSDs generally feature 7% over-provisioning while enterprise SSDs generally feature 28% over-provisioning. Some enterprise SSDs however, have been known to have over 50% over-provisioning for improved write endurance.

     

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