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Error: need more than 1 value to unpack when starting a vm with drbd

This document (7007426) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 11 Service Pack 1


When attempting to start a VM on a block device of type DRBD the following error occurs:
"Error: need more than 1 value to unpack"

Example from /etc/xen/vm/<vm_name> config file:
disk=[ 'drbd:r0,xvda,w', ]


Fixed in March 2011 update of xen-tools package.

Additional Information

A work-around (and actually the recommended configuration) is to manage DRBD outside of XEN and then to use a block device of type PHY to launch the VM.

Example from /etc/xen/vm/<vm_name> config file:
disk=[ 'phy:/dev/drbd0,xvda,w', ]


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7007426
  • Creation Date: 27-Dec-2010
  • Modified Date:28-Sep-2022
    • SUSE Linux Enterprise Server

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