exachk does not check storage server

hi experts,

I ran exachk215 on a 1/4 exadata, everything seem  ok , but there  are not any storage server content in result report.

follow is exachk output:

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......

Collecting - Verify RAID Controller Battery Condition [Database Server]

Collecting - Verify RAID Controller Battery Temperature [Database Server]

Collecting - Verify database server disk controllers use writeback cache 

Collecting - root time zone check

Preparing to run root privileged commands on [5mSTORAGE SERVER[0m odscel01

root@192.168.10.3's password:

Preparing to run root privileged commands on [5mSTORAGE SERVER[0m odscel02

root@192.168.10.4's password:

Preparing to run root privileged commands on [5mSTORAGE SERVER[0m odscel03