Não posso adicionar formatação aos comentários, por isso vou apenas reiterar o que comentei na outra resposta. Você pode escolher o Btrfs ou o ZFS, mas o ZFS só deve ser usado em cenários de vários discos devido à maneira como o ZFS foi projetado:
Technically you can do deduplication and compression.
But there is no protection from corruption since there is no redundancy. So any error can be detected, but cannot be corrected. This sounds like an acceptable compromise, but its actually not. The reason its not is that ZFS' metadata cannot be allowed to be corrupted. If it is it is likely the zpool will be impossible to mount (and will probably crash the system once the corruption is found). So a couple of bad sectors in the right place will mean that all data on the zpool will be lost. Not some, all. Also there's no ZFS recovery tools, so you cannot recover any data on the drives. You cannot use the standard recovery tools that are designed for NTFS, FAT32, etc either. They don't work correctly.
So what does all of this mean? It means that you run the risk of everything being just fine, and then suddenly (and without warning) all of the data is irretrievably lost.
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