What good would ZFS be without that? The key differences are in two places: 1. Every administration task for ZFS is done online. You don't need to take your p

What good would ZFS be without that? The key differences are in two places: 1. Every administration task for ZFS is done online. You don't need to take your pool offline just to check for errors and repair them (if possible). (Mind that on FreeBSD, UFS can usually have a fsck done in the background while the file system is in-use. Just about zero Linux-native file systems have this capability) 2. "other filesytems" can only hope to detect and repair inconsistencies in their metadata structures. If your files are corrupted, they can't know and won't tell you that they are. ZFS checksums everything, including regular file data. It will repair regular file data too, if possible.