How to Resolve CIFS-mounted Backup Drive Permissions Errors
Valid for versions 82 through the latest version
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
Permission denied errors may result from missing extended attributes on the CIFS-mounted drive.
For more information about CIFS, read our Backup Configuration documentation.
Resolve the error
To resolve the permission denied errors for the CIFS-mounted drive, perform the following steps:
/etc/fstabfile so that the CIFS-mounted drive uses the
user_xattroption. This will resemble the following example:
1 2 3 4
/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 //192.0.2.0/mybackup /backup cifs user,uid=500,rw,suid,credentials=/root/.cifs,user_xattr 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
We strongly recommend that you store your CIFS-mounted drive’s access credentials in a separate, secure file.
remount mountcommand to remount the CIFS-mounted drive.
lsattr /CIFS_mountcommand to add the extended attributes.Important:
The mount does not support extended attributes if the
lsattr /CIFS_mountcommand returns the following error:
Error means not available: lsattr: Inappropriate ioctl for device While reading flags on ...