I have 10 TB parity drive and 8TB+2TB of array drives.
Parity no errors, everything ok.
8 TB drive had some small errors, not a problem.
Don't ask me why and how, but I ran "badblocks -ws -b 4096 /dev/sde" for 61h (still running) on this 8 TB drive. And then I checked again what this command means and apparently I trashed all data on this drive with it...
What should I do now exactly?
Shall I break this bad blocks test and format this 8 TB in GUI? How is recovering from parity working? Everything in GUI? What are the next steps?