Kernel panic on s390x after manual initramfs regeneration without zipl execution

Solution Verified - Updated -

Issue

  • After regenerating the initramfs using dracut -f without executing the zipl command, the system fails to boot and encounters a kernel panic with error:

    No filesystem could mount root, tried:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

Environment

  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux 10
  • IBM Z(s390x)
  • zipl

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