What is Write amplification?
The amount of data actually written to flash exceeding what the host wrote, because of garbage collection and similar operations. The larger it is, the shorter the SSD's life.
Field: SRAM and flash memory
Write amplification in the explanations
The ratio is the write amplification factor (WAF), which can reach several times under small random writes.
Which correctly describes "write amplification" in an SSD?These extra copies cause write amplification, and the fuller the drive, the more often garbage collection runs and the more write performance suffers.
Which correctly describes garbage collection in an SSD?The TRIM command tells the SSD which ranges are no longer needed; it marks those pages invalid and can erase them without copying, reducing write amplification and improving performance and lifespan.
Which command notifies an SSD of space freed by files delet…
Questions that mention Write amplification (3)
Related terms
Garbage collection TRIM NVMe 3D NAND 6T SRAM cell Charge-trap cell Floating gate Fowler-Nordheim tunneling NAND flash memory Nonvolatile memory