Hi Antonio,
I am trying to understand the symptom---what exactly do you mean the "SSD drives crash"?
Is it just that you cannot cancel the trim? Or is there some other symptom?
I mean that all mounted filesystems, on MD RAIDs and ZFS RAIDZ2, are inaccessible, with system load in the thousands, which indicates that there is a lot of processes in a "D" status.
You do not have a consistent set of zfs packages installed---please fully upgrade to 2.0.3 (or at least 2.0.2). You have zfs-dkms from unstable, and the rest of zfs from backports. I don't know exactly what you've done to get this setup, but it is not a supported configuration, and may be dangerous to your data.
The production environment is buster with zfs from the backports, and a custom 5.4 kernel.
While executing the reportbug program on a test server, I was advised to test the latest release. So I installed zfs 2 from testing (stable APT Pin-Priority: 900, testing: 400). I then checked if the trim cron was still present, and implemented in a similar way.
I would not use that in a production environment indeed, thank you for noticing.
Best Regards, Xavier
