Reports an online state when the ZFS file systems that share a common storage pool are mounted, and the zpool command zpool list -H -o health $Poolname indicates if the pool is online or not.
offline
Reports an offline state when all of the ZFS file systems that share a common storage pool are unmounted. It also reports an offline state when the zpool command zpool list -H -o health $Poolname command's status indicates that the pool is offline.
unknown
Reports an unknown state in the following situations:
If the status of the storage pool is unavailable of faulted.
If the storage pool is online but the path of the mounted file system does not match the path that is specified in the AltRootPath attribute of this agent.
