PCMark Vantage - Drives with Data Testing
For a complete breakdown on the Drives with Data Testing please read this article. You will be able to perform this test at home with the files provided in the article - full instructions are included.
- Brief Methodology
SSDs perform differently when used for a period of time and when data is already present on the drive. The purpose of the Drives with Data testing is to show how a drive performs in these 'dirty' states. SSDs also need time to recover, either with TRIM or onboard garbage collection methods.
Drives with Data Testing - 25%, 50%, 75% Full States and Dirty / Empty Test
Files needed for 60 (64GB), 120 (128GB), 240 (256GB)
60GB Fill - 15GB, 30GB, 45GB
120GB Fill - 30GB, 60GB, 90GB
240GB Fill - 60GB, 120GB, 160GB
Empty but Dirty - a test run just after the fill tests and shows if a drive needs time to recover or if performance is instantly restored.
SSDs slow as data populates the flash and the M500 960GB has a lot of flash to populate. In these tests we fill the total flash to 25%, 50% and 75% full. The M500 holds a steady performance level through the different states, but if you look at the bottom of the chart, the m4 512GB does better when the drives are heavily populated.
Here we see the Crucial m500 960GB compared to the Crucial M4 512GB side by side with the M500 on the left. PCMark Vantage uses daily use programs that focus on reading data more than writing data. Looking at the sequential read performance we see why the m4 512GB scores higher than the M500 in our fill test, m4 has higher sequential read performance.
What the fill test didn't show is the massive increase in write performance when the drives have data on them. In the two CDM results above both drives are populated with data to where only 50GB of space remains. The M500 has a massive advantage when writing data in this state.
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