Applies ToSQL Server 2014 Developer - duplicate (do not use) SQL Server 2014 Enterprise - duplicate (do not use) SQL Server 2014 Standard - duplicate (do not use) SQL Server 2014 Express - duplicate (do not use) SQL Server 2014 Web - duplicate (do not use) SQL Server 2012 Service Pack 3 SQL Server 2012 Developer SQL Server 2012 Enterprise SQL Server 2012 Express SQL Server 2012 Standard

Symptoms

When you back up a database or a database log to a network share Universal Naming Convention (UNC) path in Microsoft SQL Server 2014 or Microsoft SQL Server 2012, the network storage device indicates that SQL Server searches for the filestream.hdr file in its parent directories. This generates some unexpected overhead on certain storage devices.

Cause

This issue occurs because SQL Server checks for the filestream.hdr file to prevent a file from being backed up to a FILESTREAM container. However, this is generally unnecessary for a network share.

Resolution

Cumulative update information

This fix relaxes the check for a UNC path.The issue was first fixed in the following cumulative update of SQL Server:

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. We recommend that you download and install the latest cumulative updates for SQL Server:

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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