[email protected] wrote: > This is a space where "price" or "quality" make a difference. > > A "good" SSD has a lot of extra sectors to map in when it detects a write > error. All done internally to the drive. Better drives do a lot of things > to reduce wear. Some do dedup. Some don't store blocks that are all zero > or blocks that are all ones. > > Its kind of hard to adjust your usage, suffice to say, it is all based on > the amount of change. Individual SSD cells can handle from 3,000 to > 100,000 writes depending on the technology. It is possible to pay twice as > much for a drive that will have 30 times more usable write longevity. > > If your data is largely unchanging, it doesn't matter. If you have a > highly dynamic write environment, go for single level cell NAND flash, > that will last the longest. Find a good enterprise drive that has extra > capacity to remap as cells fail.
* In practical usage, commercially available SSD cells range from 300 write lifetimes to 20,000 (3D Xpoint/Optane, no longer being produced but stock exists) with far too many being at 600 or 1200. * SLC drives are very expensive and small. ($2/GB for 500GB, no performance warranted, no brand name. $5/GB for stated performance...) -dsr- _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
