Alles anzeigendmesg would tell you this, conclusively.
Not true if the flashmemory plugin is used. I have a USB thumbdrive, that I've been using as a boot drive, that's over 4 years old. SD-cards may not last that long, but cloning them is a breeze. -> Here.
And then something goes wrong. There's no guarantee with any drive. Sooner or later, "it" happens.
I'm glad you finally disclosed this. I say it as well and the same advice is given in the project's guide for R-PI builds. The desktop version of R-PI OS allows for the installation of conflicting software up to and including packages that will uninstall OMV. Also, the order in which software is installed, using Internet guides, can create networking issues that may affect Dockers.
Since you have an 8GB R-PI, I can see using the 64bit version of Rapsberry PI OS-LITE That's fine. Other than that, you might consider going to the source of the unofficial guide you used for support.
I have just wiped the SSD drive where i had the OS. Made a fresh install of Raspberry OS and installed OMV and OMV Extras. Eyes are bleeding at the moment but i will continue to configure everything tomorrow and see if this does the trick or not.
I am skeptical that it is a drive issue, although you never know. But i made a complete wipe of the drive.
I do think that i might have corrupted something at some point because i used to have loads of stuff on this RPI and i have transferred a lot of server stuff to a real server machine.
I will keep you all updated in how things progress. Thanks a lot for the quick responses.