Answering as a novice: The whole point of ZFS is that if a bit gets flipped, it's corrected the next time the file is accessed. There's a scrub command that ma

Answering as a novice: The whole point of ZFS is that if a bit gets flipped, it's corrected the next time the file is accessed. There's a scrub command that manually hits every file to check for integrity and you can schedule it through cron. And I assume you can control the size of the snapshots, I haven't looked into it but it would be pretty silly if you couldn't. I have four 3TB drives in RAID-Z and I have 9TB to play with, same as RAID-5.