Steps to reproduce:

1. zabbix_agent2 -t smart.disk.discovery -v on a machine with megaraid controller.

Result:
No disks detected.

Output: see log: zabbix-agent-smart-discovery.log

Expected:
Have megaraid disks discovered properly to do smart monitoring.

Addition notes:

I have added another log file that shows smartctl scan output for your reference.
This is a regression as it was working in an older version of zabbix-agent2 before.