I'm thinking since a while about replacing mdadm's raid5 with ZFS' RAIDZ in my two NAS: if I understood correctly, in the case of single/few block failures ZFS

I'm thinking since a while about replacing mdadm's raid5 with ZFS' RAIDZ in my two NAS: if I understood correctly, in the case of single/few block failures ZFS would transparently remap the bad block(s) present on the bad HDD to a good block on the same HDD (therefore without having to immediately replace the partially faulty HDD and rebuild the whole raid) => is this correct? I admit that continuing to use the partially faulty HDD might be a bad idea, but at least having a raid 100% healthy before replacing the partially faulty HDD gives me a good feeling... .