When it comes to the endurance of NAND Flash products, the Write Amplification Factor plays an important role in maximizing a products usable life. By definition, the write amplification factor is the amount of data the product controller has to write in relation to the amount of data that the host controller wants to write. Write amplification occurs because the flash device is internally organized in pages and data can be written to it only on a page by page basis. The lower the WAF, the longer the product will last.

Swissbit follows to measure and calculate the write amplification factor (WAF) for the following workloads:

• The enterprise workload is in accordance with JEDEC standard number 219.
  This test takes 168 hours (7 days) to complete.
• The client workload is in accordance with JEDEC standard number 219A.
  This test takes >10 hours to complete.