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- Each write requires programming a fresh page (a page that wasn't
programmed since its block was last erased).
- Writing into the same LBA again - makes the specific page that contains
the old data - invalidated.
- This can cause fragmentation, which will leave no fresh cells for writing,
- Before this happens - the SSD will choose the least-valid blocks, copy
their valid pages to an empty block - and mark all those blocks as free.
- These techniques may cause a single page write, to perform several
page writes - write amplification.
- If each write causes two page writes on average, the SSD is said to
have a write amplification factor of 2.
- Enterprise-Grade SSD designers employ complicated algorithms to reduce
the write-amplification factor of their devices.