Why does system stuck at dracut prompt after modifying /etc/default/grub ?

Solution Verified - Updated -

Issue

  • Modifying /etc/default/grub recreating grub configuration file the system is not able to boot to any of the kernel and falls to dracut prompt.

    [  203.973691] dracut-initqueue[861]: Warning: dracut-initqueue timeout - starting scripts
[  203.973993] dracut-initqueue[861]: Warning: Could not boot
[  204.210138] dracut-initqueue[861]: Warning: /dev/mapper/rhelvg-root does not exist
[  204.212524] dracut-initqueue[861]: Warning: /dev/rootvg/root does not exist
[  204.214691] dracut-initqueue[861]: Warning: /dev/rootvg/swap does not exist
         Starting Dracut Emergency Shell...
     :
     :
dracut:/#

Environment

Red Hat Enterprise Linux 7

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