[Andreas] took on the popular project which combines a hard drive and optical mouse to build a scratch controller. The gist of the build is that you use an optical mouse sensor to track the ...

A hard disk used as a work ... as editing large images or video, the scratch disk is used to hold the data being edited. Having one or more dedicated drives for scratch disks is the most efficient.

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Scratch tests are performed to assess resistance to the scratching, gouging, scraping or engraving of hard, flat test samples. Scratch tests can also be used to establish the relative purity of ...