How to boot a system without any other root device

Solution Unverified - Updated -

Issue

  • We have a x86 server board that has no disk (diskless).
  • We don't want to use nfs mount for any root device.
  • We created a ramdisk including all files required on their system.
  • How can we boot the system? What is the boot parameter needed?

Environment

  • Red Hat Enterprise Linux 6

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