Check manual page of synology_disks
Synology NAS: Harddisk Status
This check monitors the health and current status of
hardisks attached to a Synology NAS device.
The check returns an CRIT in case of an error state reported
by the device. The check also reports the model number and the
temperature for each disk.
SSDs that are found within the state 3 (not initialized) during recovery
are assumed to be cache disks and will always interprete state 3 as OK.
The name of the disk like reported in the MIB
One check is created for each Disk