I have a few dodgy cheap SSDs, so I’m not surprised by slow I/O performance in general. But my Plasma desktop frequently freezes for 1-3 seconds (including the cursor!) whenever there is high IO load, for example while installing a Steam game.
Updating the screen should be completely independent from I/O, shouldn’t it? Is there anything I could’ve misconfigured in my Arch Linux? I’m running Plasma 6.1.4 in Wayland.
Happened to me as well, freezing up the whole system, especially with many/large files. None of the suggestions I found online actually worked. Happened on USB drives as well.
Then my whole HD gave up completely. Replaced it and all problems are gone. USB drives as well: turns out Linux at least tries to read it so you can attempt to save some data, while Windows just says it’s unreadable.