3 ms·
Reading also wears out nand flash. SSD have read counters next to erase counters, too many reads and drive forces whole sector rewrite to mitigate data degradat
by rasz_pl 12y ago
Reading also wears out nand flash. SSD have read counters next to erase counters, too many reads and drive forces whole sector rewrite to mitigate data degradation.
- Gurkenmaster 12y agoDoes this mean that SSDs will lose data if you reach the write limit and continue reading from it?
- dillondf 12y agoThere is something called read-disturb, where reading a row of NAND over and over again can disturb adjacent rows. The effect is many orders of magnitude lower than the erase wear effect and data caching within the drive (as well as data caching in the OS) mitigates it significantly. So for all intents and purposes you don't have to worry about it. The SSD's normal internal scans will detect the bits when they start to get flaky and rewrite the block then. It might do some rough tracking to trigger a scan sooner than it would otherwrise, but it is more a firmware issue and not so much a wearout issue. -Matt