Unfortunately, the system was never in productive use with this setup.
We had random restarts in the test phase (this are some other threads).
The reason for this was neither this setup nor the LVM cache. What turned out later.
The solution to this problem took us months.
But for these reasons, we then tested without the SSD, to exclude as many sources of error as possible.
and now from it a productive system has become, also without both SSDs.
The server has been running productively for about half a year now
Maybe I will rebuild that in the next school holidays (a big vocational school)
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