25536: Acronis vmProtect 6: Backup Fails with "Internal error: number of backed up sectors differs from counted"

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This has been fixed

This article applies to:

  • Acronis vmProtect 6

Symptoms

Backup of virtual machines fails with the following error:

Internal error: number of backed up sectors differs from counted

Here is an example of the full error message:

--------------------
Error code: 3
Module: 435
LineInfo: 555b5abba0950053
Fields: $module : C:\Program Files (x86)\Acronis\vmProtect\Windows Agent\vmms.exe
Message: Failed to create the backup.
--------------------
Error code: 32786
Module: 114
LineInfo: 28314c961de7d2fd
Fields:
Message: Failed to prepare for backing up.
--------------------
Error code: 353
Module: 149
LineInfo: a71592046cb2c5c6
Fields:
Message: Failed to back up the group.
--------------------
Error code: 2
Module: 218
LineInfo: 600f7166ce397de5
Fields:
Message: Error occurred while running the backup and recovery engine.
--------------------
Error code: 1
Module: 7
LineInfo: a5695862aaf8e6b9
Fields: $module : C:\Program Files (x86)\Common Files\Acronis\vmProtectAgent\vmProtectService.exe
Message: Failed to perform the operation with archive 'avfs:/local?C:/Archive_2011_07_27_16_37_27_390D.TIB'. Error: 'Internal error: number of backed up sectors differs from counted'.
--------------------'.

Cause

Issue in the product.

This error may appear if CBT backup option is turned on during backup of certain file systems.

Solution

(!) This has been fixed. The fix is available in the latest released build of the product. You can download the latest build from Product Updates page.

To work around the issue without installing the latest build, do the following:

  1. Make sure that VMware Tools are installed on the virtual machines that you are trying to back up. If VMware Tools are not installed in the virtual machines, install them;
  2. If the issue persists with VMware Tools installed, as a workaround deactivate CBT backup setting for the problem task:

More information

See also Acronis vmProtect 6.

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