David Christensen wrote: > On 2/13/19 6:11 AM, Dan Ritter wrote: > > If you want maximum SSD longevity, increase the amount of space that > > the SSD can use for remapping by never writing to some amount of > > space. Easiest is to not fill the disk with partitions -- leave 5-10% > > empty. > > AFAIK over-provisioning has no effect on longevity -- longevity is > proportional to total number of cells times rated erase/ write cycles > per cell divided by write throughput. > > > But, over-provisioning can improve write performance: > > https://en.wikipedia.org/wiki/Write_amplification#Over-provisioning
Effective longevity depends on the number of times a block is erased and written to. You can reduce that over the course of an SSD's lifetime by limiting the space you think you have available. >From the article you cited: "Over-provisioning often takes away from user capacity, either temporarily or permanently, but it gives back reduced write amplification, increased endurance, and increased performance." Increased endurance is increased longevity. -dsr-
