Insert the "export NOSMBFS=1" to /usr/sbin/acronis_mms to fix the issue

Difference between the Linux-like and Windows-like disk representation in Acronis Bootable Media

This article lists the supported storage destinations for backups with Acronis vmProtect 8 

Create a login and password for backing up to network share

You have defined an SMB and NFS share with same name. From Acronis Backup you can only access the NFS Share. Rename one of both to access both. 

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.


You backup files and/or folders on an SMB network share. 

Backup finishes with a warning:

No such file or directory


Backup to NAS or a different activity(replication, validation) fails with:

 Windows error: (0x80070544) The validation information class requested was invalid


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).




  1. You installed a Windows update (version 1709 and later),
  2. Backup, replication or another operation with a destination network share fails with:

Windows error: (0x80070180) You can't connect to the file share because it's not secure. This share requires the obsolete SMB1 protocol, which is unsafe and could expose your system to attack. Your system requires SMB2 or higher. For more info on resolving this issue, see:

Acronis Cyber Protect Home Office, Acronis True Image 2021, 2020, 2019, 2018, 2017 and 2016 support the following network protocols:

SMB (Server Message Block)
CIFS (Common Internet File System, Microsoft`s reworked version of SMB)
SMB2 (introduced with Windows Vista)
SMB3 (introduced with Windows 8. Latest update is SMB 3.1.1 as of November 2019, introduced with Windows 10)
FTP (File Transfer Protocol, supported only in Windows version of Acronis True Image, Linux and WinPE-based rescue medias)


Backup to a Synology NAS with DSM 7.0-41890 fails with:

The credentials for location are not specified


When you add an SMB network share as a backup destination in the protection plan or when you add an SMB network share on the Backup Storage tab, the following error message is returned:

tenant scope not granted


Issue in the product.

This issue occurs when the network share is already added for one user, and you attempt to add it to the second user.


This issue has been fixed in Acronis Cyber Protect Cloud 21.06.