Question: does zfs need ecc ram?
Answer: Conceptually, ZFS does not require ECC memory any more as any other file system. ... There's nothing special about ZFS that requires/encourages the use of ECC RAM more so than any other filesystem. If you use UFS, EXT, NTFS, btrfs, etc without ECC RAM, you are just as much at risk as if you used ZFS without ECC RAM.