Disclaimer: The procedures described require advanced technical knowledge. Misuse may result in system instability. Always test in a non-production environment first.
If you see “Invalid system disk,” the USB was not created with proper bootable DOS. Recreate using Rufus with FreeDOS. hp dmi tool bootable usb
Have you successfully restored your HP DMI data using this method? Let us know in the comments below. hp dmi tool bootable usb