When protecting Windows Sorage Server that have Single Instance Sorage enabled, the DPM 2010 Server may become unresponsive / hang after protecting a SIS enabled volume on the Windows Storage Server
For DPM Servers running "Windows Server 2008" and experiencing server hangs while protecting Windows storage servers with SIS enabled voumes, you need to apply this fix on the DPM Server:
979040 Windows Server 2008 is unresponsive because of a deadlock in Sis.sys
http://support.microsoft.com/kb/979040
For DPM Servers running "Windows Server 2008 R2" and experiencing server hangs while protecting Windows storage servers with SIS enabled voumes, you need to apply this fix on the DPM Server:
KB2608658 Update rollup for the SIS component in Windows Storage Server 2008 R2
http://support.microsoft.com/kb/2608658
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