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The system enters the Dracut CLI when installing the RHEL 7 OS using a USB
flash drive with ISO images burned into it via UltroISO on Windows. The
installation fails, and the following messages are shown:
dracut-initqueue[624]:Warning: Could not boot.
dracut-initqueue[624]:Warning: /dev/root does not exist.
Starting Dracut EmergencyShell…
Warning: /dev/root does not exist
Cause analysis:
The installation path written into the USB flash drive via UltroISO on Windows
is not recognized by the Linux installation program.
Solutions:
Use Fedora Media Writer, a usb-media creation tool recommended by Red Hat,
to create bootable USB media. Click the following URL to download the tool:
https://github.com/FedoraQt/MediaWriter/releases
Refer to Section 3.2.2. Making Installation USB Media on Windows on Red Hat
official website:
https://access.redhat.com/documentation/en-
us/red_hat_enterprise_linux/7/html/installation_guide/sect-making-usb-
media
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