Can you check whether PSU redundancy is enabled on the server? You can login to iDRAC and check the same under "Configuration -> Power Management" page ('Redundancy Policy' setting). 
I have a brand new Dell R540 and I have just enabled IPMI over lan. The server has two PSUs and iDRAC version 5.10.30.00. When I run the command: ipmitool -H [idrac-ip] -U [username] -P [Password] -I lanplus sdr type 'Power Supply' I get the following response; PS Redundancy ¦ 77h ¦ ns ¦ 7.1 ¦ Disabled Against older R510 servers the same command responds; PS Redundancy ¦ 77h ¦ ok ¦ 7.1 ¦ Fully Redundant   Is this a known issue? I found some similar report for 11g servers, is this true of 14G servers too? How should I check for PSU redundancy using IPMI if I am doing it incorrectly?   Thanks, Rob
IPMItool not reporting Power Supply redundancy R540