RAID Controllers (Software and Hardware) need to be aware of SMR. The easiest fix is that the controller will not allow you to mix SMR and CMR technologies in a

RAID Controllers (Software and Hardware) need to be aware of SMR. The easiest fix is that the controller will not allow you to mix SMR and CMR technologies in a single array. ZFS and friends need to check that too and if there is an SMR drive, give warning and handle it appropriately. You can't resilver an SMR like a CMR; the performance is bad enough that a few controllers will think the drive is dead too.