I have successfully used 4 different USB 2 powered hubs at 4 different locations. Any one will do, but I like the ones with the fatbot USB B as usually used for printers. Most robust.
Now I have a work around. Actually, I do not think its a deconz problem or SSD or HDD problem.
It turns out that anouther piece of software (pivccu3, piVCCU/raspberrypi.md at master · alexreinert/piVCCU · GitHub) may cause this problem in bullseye with the deconz, but does not cause this problem in buster.
This is odd but its not about cables. So, not I tried this with an alternative piece to work with the homematic and deconz on same rasp pi 4b device. GitHub - alexreinert/debmatic: debmatic is a project to install the Homematic OCCU on Debian based systems (Debian, Ubuntu, Raspbian, Armbian).
the pivccu is creating a container and debmatic not.
Now I´ll monitor if this installation keeps me happy.
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