Similar to this question (https://serverfault.com/questions/192394/megacli-always-returns-blank-output) with some differences.
I am using perc h710p raid controller on Dell Ubuntu box.
1.01.39_Linux_Cli.zip (according to https://calomel.org/megacli_lsi_commands.html) and saved
MegaCli64 on Ubuntu usb boot drive.
Then I boot the machine into USB, and run
But the output is always blank.
Thank you very much for the help.