Check manual page of hitachi_hnas_psu
Hitachi HNAS: Status of Power Supplies (PSUs)
Checks the status of Power Supplies (PSUs) in Hitachi HNAS storage systems.
It was tested against Hitachi HNAS Modell 3090 but probably will work
for other HNAS devices too - give it a try.
Returns OK if the reported state is "ok". Returns WARN on state "notFitted".
Returns CRIT on state "failed" and UNKN on every other state.
The ID of the PNode plus the ID of the PSU, separated by a dot. E. g. 1.2
Creates one check for every PSU in the HNAS system.