This article describes an update for Storage Spaces in Windows 8 and Windows Server 2012. After you install the update, Storage Spaces will prioritize regeneration. Specifically, the regeneration time is shorter, but the available bandwidth for the regular I/O buffer is decreased.
To resolve this issue, install the Windows 8 and Windows Server 2012 update rollup 2836988. For more information about how to obtain this update rollup package, click the following article number to view the article in the Microsoft Knowledge Base:
2836988 Windows 8 and Windows Server 2012 update rollup: May 2013
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about Storage Spaces, go to the following Microsoft website: