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What happens to the user partition if I downgrade a device that is running the jinstall-qfx-5-flex-x.tgz software bundle to a device that is running a different software bundle?
In this case, the user partition remains intact.
Note: If you make changes to the user partition while performing a unified in-service software upgrade (unified ISSU), the changes might be lost.
For more information, click Installing Junos OS Software with Junos Automation Enhancements.