Failed unmounting /usr on boot

This document (7018386) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 12 Service Pack 2 (SLES 12 SP2)


After an upgrade to SUSE Linux Enterprise Server 12 Service Pack 2 the following error message is observed on boot or in the /var/log/boot.log:

[FAILED] Failed unmounting /usr.

And 'journalctl' shows:

umount[958]: umount: /usr: target is busy

The system finishes booting and there appears to be no real harm to the system as /usr won't be unmounted. However the system should not even attempt to umount /usr at this stage.

(This is only shown when /usr is on a separate partition. Unless btrfs/snapshots is being used requiring /usr on the root file system, /usr can be on a separate partition.)


The systemd update, systemd-228-126.1 released January 2017 includes the patch for the problem. Please install the recommended update.


Additional Information


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:7018386
  • Creation Date: 13-Dec-2016
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server

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