Changes

By nature, these components are subject to several issues that need to be handled properly. If not, this can affect negatively their performance in terms of reliability and/or lifetime.

===Wear-out===

One of the most important factors to take into account is wear-out. Simply put, this is a degradation of the memory device due to repeated erasing/writing cycles aka P/E cycles. In order to mitigate this phenomenon, erasing and writing operations have to be distributed uniformly all over the memory. Please note that this process, known as wear leveling, can be either implemented in the host (in the case of a raw NAND memory, for example) or in the memory device itself (for instance, in the case of eMMC's).