System State or Volume Shadow Copy backup is partially successful with "Error encountered while attempting to get additional files for System State:\"

Problem

System State or Volume Shadow Copy backup is partially successful with "Error encountered while attempting to get additional files for System State:\"

Error Message

bpbkar log snippet showing the error:

<2> tar_backup_tfi::setupFileDirectives: TAR - backup filename = Shadow Copy Components:\
<2> ov_log::V_GlobalLog: INF - brUtil::OpenActiveObject Error: 0xE0008485 Could not open the object autorun.inf     C:\Windows\winsxs\amd64_microsoft-hyper-v-guest-installer_31bf3856ad364e35_6.1.7600.16385_none_cd99f2d63b73fe98\autorun.inf
<2> ov_log::V_GlobalLog: INF - Status FS_IN_USE_ERROR (0xE0008485) for Component System Files in SHADOW::ReadComponent
<2> ov_log::V_GlobalLog: INF - AD:Status FS_READING_OBJECT_FAILURE (0xE000FEDF) calling FS_ReadObj in SystemState::ReadObj:185
<2> ov_log::V_GlobalLogEx: ERR - beds_ss_access::_read() FS_ReadObj() Failed! (0xE000FEDF:A failure occurred reading an object.
<2> tar_base::V_vTarMsgW: ERR - failure reading file: System State:\System Files\System Files (WIN32 -536805665: Unknown error)
<2> tar_base::V_vTarMsgW: ERR - Error encountered while attempting to get additional files for System State:\
 

Cause

At the same time of the backup error, Windows Server event logs show file access is blocked by AntiVirus rule:

McLogEvent I257 Blocked by access protection rule. Access to object \Device\HarddiskVolumeShadowCopy20\Windows\winsxs\amd64_microsoft-hyper-v-guest-installer_31bf3856ad364e35_6.1.7600.16385_none_cd99f2d63b73fe98\ autorun.inf  was blocked by rule User-defined Rules:Block autorun.inf.

Solution

Disable antivirus scanning of the NetBackup processes.

See Related Documents for Reference:

• Best practices for using NetBackup in environments with McAfee McShield 8. This article describes a best practice to configure McAfee McShield for optimal backup performance.