pfSense

This idea was posted on the forum. It doesn't look hard and if an install needs ZFS (not just reinstall + use a saved config) then such a user will probably value this as well.

The idea can be summed up as follows:

The GUI includes two controls related to ZFS: a list of disks or storage devices, and an option to enable/disable autoreplace. The list of disks gives their status (pool name, "SPARE", "FAILED", etc) with icons for actions like attach/detach next to them, for manual maintenance.

If autoreplace is enabled in the UI then autoreplace=on is set on the pool. In addition a script is periodically run with this effect:

1. Check if the boot pool is degraded, and if so, whether a spare has been switched in and resilvering completed.
   If so.....
2. Offline the failed disk to ensure the boot pool doesn't have issues next time the system reboots.

Original idea first post here: https://forum.pfsense.org/index.php?topic=126597.0