BUG REPORT: A UNC backup of a shared folder from a Windows 2008 R2 client fails with Status Code 13.

Article:TECH157209  |  Created: 2011-04-01  |  Updated: 2013-09-06  |  Article URL http://www.symantec.com/docs/TECH157209
Article Type
Technical Solution




A backup of a UNC (Universal Naming Convention) path of a NetApp NDMP filer fails with a Status Code 13 (file read failed) in NetBackup 7.0.1.

The process bpbkar32.exe faults on Windows 2008 R2 Servers.


NetApp NDMP:  Data Ontap 7.3.5.

Master Server: Netbackup 7.0.1

Client: Windows 2008 R2 x64


The backup and archive process (bpbkar32.exe) is faulting on the system causing the backup to fail.


The work around procedure is to disable NetBackup Fast I/O (NTIO) by setting the registry to UseNTIO=0.

NOTE: NetBackup 7.5 will generate the following registry key by default during installation on Windows.

Disabling Fast I/O forces SYMANTEC NetBackup (tm) to use the built-in Windows BackupRead API (Microsoft published API) as opposed to using the NetBackup version of the BackupRead() API.

See Microsoft article for details: BackupRead Function:


To disable Fast I/O:

1. Click Start and Run, type regedit, and click OK

Warning: Incorrect use of the Windows registry editor may prevent the operating system from functioning properly. Great care should be taken when making changes to a Windows registry. Registry modifications should only be carried-out by persons experienced in the use of the registry editor application. It is recommended that a complete backup of the registry and workstation be made prior to making any registry changes.

2. Browse to HKEY_LOCAL_MACHINE\Software\VERITAS\NetBackup\CurrentVersion\Config

3. In the Config registry key, create a new key called NTIO

4. In the NTIO registry key, create a REG_DWORD value, give it the name UseNTIO, and the value 0 (zero)

Note: Fast I/O is enabled by default.  Setting the UseNTIO registry key set to zero (0) disables Fast I/O.

To enable NTIO set the registry key to one (1) or remove the key.

Supplemental Materials


bpbkar32.exe produces application fault when backing up data via UNC path.

Article URL http://www.symantec.com/docs/TECH157209

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