Why is my system hanging at boot with "Scanning for Devices"?

Solution Verified - Updated -

Issue

  • After patching server and rebooting it, the server does not initialize or come up. On a Dell system, boot seems to hang with message: Scanning for devices. Please wait, this may take several minutes.... with a blinking cursor. This failure occurs before the grub menu appears.

Environment

  • Red Hat Enterprise Linux 6
  • Dell system

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