How to re-install GRUB bootloader on the Master Boot Record(MBR) in rescue mode

Solution Verified - Updated -


  • I had to restore my system and data partitions from tape after a crash. Why does my Red Hat Enterprise Linux system only shows a black screen after POST?
  • Why does my Red Hat Enterprise Linux 6 system drops to GRUB rescue prompt on boot?
  • How to reinstall grub2 into the MBR on Red Hat Enterprise Linux 7
  • I re-installed Windows on my server and now I can no longer boot to Red Hat Enterprise Linux.
  • On attempting to re-install grub I get the following error "Error 5: Partition table invalid or corrupt"
  • When I do grub-install I get error as "Error 12: Invalid device requested"


Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content