Error Installing CentOS 7

I received the error “This program has encountered an unknown error.” When installing CentOS. At the end of the report it had details about RAID and I remembered that the disk was part of a RAID.

To get rid of the RAID config:

  1. Restart the server.
  2. At the menu choose Troubleshooting Choose Rescue a CentOS system.
  3. You will be asked to make a selection, type in 1 and press enter. 
  4. You will see a prompt “Please press return to get a shell.
  5. Press the enter key Under “Rescue Mount” check which disk you need to configure i.e. sdb
  6. Now type: dmraid -E -r /dev/yourDisk i.e. (dmraid -E -r /dev/sda1)
  7. You will be asked if you want to erase “isw”. type y and press enter.
  8. Reboot your server and install CentOS 7

Here’s a video showing the screenshots I took:


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