Allows to access smb shares

This article applies to:

  • Oracle Linux Server 6.5 Kernel 3.8.13-44.1.3.el6uek.x86_64
  • Oracle Linux Server 6.6 Kernel 3.8.13-44.1.3.el6uek.x86_64
  • Oracle Linux Server 6.8 Kernel 3.8.13-118.14.2.el6uek.x86_64

Other kernel versions of Oracle Linux Server 6.x may be affected as well. The list above contains the kernel versions that produced the issue in Acronis test lab.


Backups to QNAP NASes may fail at the very start of the backup with high-level user-visible errors like "error 0x29b1399: Network operation failed" (at the bottom of the detailed error stack, when viewed in the Acronis Backup Console UI).

It is possible that some backups to the same NAS work fine, while only a few or even one backup/backup plan fails.

Most often creating a new backup plan and using a new TIBX does NOT help.


On the Agent, you may see the error:


When investigating an issue with backup to network share, you may need to check what what SMB protocol version and NTLM versions a network share supports.

This is useful in cases where there is an unexplained connection failure to a share (unsupported SMB protocol version) and in case an error "Access denied" appears when credentials are correct (possibly NTLM version mismatch).