[wlug] Testing Disk Performance With fio

Intro to a tool I hadn’t heard of before <https://arstechnica.com/gadgets/2020/02/how-fast-are-your-disks-find-out-the-open-source-way-with-fio/>, but for which standard packages are available for Debian and derivatives. Lets you do all kinds of performance tests on your persistent storage (disks, SSDs), including hammering them with multiple concurrent I/O requests. Also I see Debian has “gfio”, which is a GUI front end based on GTK. (Just a quick *sigh* to see someone else use the old cliché of referring to magnetic media as “rust”. FYI, rust isn’t magnetic.)