Hi Kimleng Vey, The error that you are receiving  “the iDRAC is not ready. The configuration values cannot be accessed” is a communication error with the iDRAC. Try to reset the iDRAC and see if it becomes responsive. On the R720 the easiest way to do this is to hold down the i button on the front of the server for more than 15 seconds, this will do a soft reboot of the iDRAC. If the iDRAC is still not responsive after you do this please power off the server and unplug it for about a minute, while it is unplugged hold the power button in for 10 seconds, this will drain any power from the system so that the iDRAC powers off fully. Once this is done reconnect power to the system and see if the iDRAC is accessible. Was the iDRAC working previously?
Dear All, Please advise solution to fix the problem (SW0700: iDRAC is not ready. The configuration values cannot be accessed.) on Dell PowerEdge R720 Server.
iDRAC 7 Not respond 