We have a new documentation site for cPanel & WHM! You can find our new documentation site at docs.cpanel.net.

We will continue to maintain our API documentation on this server.

Page tree
Skip to end of metadata
Go to start of metadata


When you attempt to perform a backup to a Common Internet File System (CIFS)-mounted drive, you may receive errors that resemble the following example:

/bin/cp: failed to preserve ownership for `': Permission denied /bin/cp: failed to preserve ownership for `': Permission denied

These permission denied errors may result from missing extended attributes on the CIFS-mounted drive. This document describes how to resolve these permission denied errors.

Resolve the error

To resolve the permission denied errors for the CIFS-mounted drive, perform the following steps: 

  1. Edit the /etc/fstab file so that the CIFS-mounted drive uses the user_xattr option. This will resemble the following example:


    We strongly recommend that you store your CIFS-mounted drive's access credentials in a separate, secure file.

    /dev/mapper/centos_centos--7--clone-root /                       xfs     defaults        1 1
    UUID=01c6e08e-bbd1-4046-af48-beaf233746d4 /boot                   xfs     defaults        1 2
    /dev/mapper/centos_centos--7--clone-swap swap                    swap    defaults        0 0
    // /user_xattr cifs user,uid=500,rw,suid, credentials=/root/.cifs 0 0


    In this example, line 4 displays the CIFS-mounted drive entry.

    • The local user owns the mounted files.
    • The CIFS drive's access credentials reside in the /root/.cifs file.
  2. Run the remount mount command to remount the CIFS-mounted drive.
  3. Run the lsattr /CIFS_mount command to add the extended attributes.


    The mount does not support extended attributes if the lsattr /CIFS_mount command returns the following error:

    |Error means not available: lsattr: Inappropriate ioctl for device While reading flags on ...|

    A mount that does not support extended attributes will not function with cPanel & WHM backups.

For more information about CIFS, read our Backup Configuration documentation.

Additional documentation

There is no content with the specified labels

There is no content with the specified labels

There is no content with the specified labels