Surely this incident highlights the importance of backups, right? 5 TB is even a manageable amount of data. I also used to run btrfs in btrfs-RAID10 configurat

Surely this incident highlights the importance of backups, right? 5 TB is even a manageable amount of data. I also used to run btrfs in btrfs-RAID10 configuration until apparently a flapping SATA link and fsck attempts were able to break the fs completely. Full system backups were great that day. I run https://kopia.io/ https://kopia.io/ nowadays every three hours during day time and I've been quite happy with it. Nowadays I run bcachefs.. Backups are still handy :). I suppose the reason why you chose NTFS was to be able to access the data from Windows, at least in case of emergency? Because there are a lot of filesystems that are presumably more mature than NTFS is for Linux.