lsof | grep /dev/sda – if a process holds the disk open (e.g., old NFS lock, fsck), reboot or stop the service.
Converter Helper will attempt to run commands with sudo. Run:
sudo -k # Reset timestamp
sudo -n fdisk -l 2>/dev/null
If you receive a "sudo: a password is required" message, you must configure passwordless sudo for the converter user:
sudo visudo -f /etc/sudoers.d/vmware-converter
# Add line: converter_user ALL=(ALL) NOPASSWD: ALL
The most common cause is network filtering. Converter uses specific ports to communicate with the Linux agent.
If the conversion works after disabling the firewall, you need to create a rule allowing traffic from the Converter Standalone server IP to the source machine on the ports listed above.
If you absolutely cannot get the live query to work, use one of these reliable alternatives.