A2 kernel issue affecting SMB/CIFS


If you experience the issue where all backups in the A2 freeze or stall, and all new backups hang at 0%, it is likely you are impacted by a Linux kernel issue affecting CIFS ADS configurations.


The following conditions ALL must apply for this to be the case:

  • All backups hang or stall until a reboot
  • You are not on A2 image rev. 1.4 or later
  • You have configured your ADS using SMB/CIFS


If these three criteria are met, you should upgrade to the latest A2 release, A2 6.1 or later. This build will automatically patch your kernel and resolve the issue unless you are not running the A2 on a XenServer system. In this case, please contact Quadric support for next steps.