System Partition goes offline on Windows Server 2008 and Windows server 2008 R2 after installing some 3rd Party Disk or Storage Management Software.

Issue 1:  

“Hyper-V Role Cannot be installed "Failure configuring windows features"


When installing Hyper-V Role you may get the following error:

 "Failure configuring windows features 
  Reverting changes
  Do not turn off your computer"

Under CBS.log look for the following 
Process output: [l:100 [100]"The boot configuration data store could not be opened.The system cannot find the file specified."][gle=0x80004005]

Issue 2:

“Failed to prepare storage for testing on node Node1 status 87”


When you run Cluster validation; Storage validation fails, under Cluster Validation Reports we can see the following error:
  List all disks visible to one or more nodes (including non-cluster disks).
  Prepare storage for testing
  Preparing storage for testing on node
  Preparing storage for testing on node Node1
  Failed to prepare storage for testing on node Node1 status 87
  Failed to prepare storage for testing on node Node1 status 87

Issue: 3: 

“The boot configuration data store could not be opened. The system cannot find the file specified.”


When you run Bcdedit /enum all you get the following error

“The boot configuration data store could not be opened. The system cannot find the file specified.” 

Look for the following registry key HKEY_LOCAL_MACHINE\BCD00000000
If we check under HKLM you will not find the key BCD00000000


If some 3rd party storage Disk or Storage Management software is installed it may bring all the volume without drive letter offline 

Generally 100 MB partition is system partition which contains Boot configuration Database and does not have a drive letter assigned.


From command prompt


C:\Diskpart> List volume

C:\Diskpart> Select volume 1 (Considering this is 100 MB system partition)

c:\Diskpart> Online volume

C:\Diskpart> exit


From the Disk Management console assign the drive letter to the 100MB partition it should bring the disk online.

To access Disk Management, open command prompt 


Select the 100 MB volume; Right click on the volume Change drive letter & Path; Assign a drive letter.

Assigning the drive letter will ensure the volume is not offline again after a reboot.

The volumes may go offline if AUTOMOUNT is disabled either while using a 3rd party storage software or if the user manually disabled the AUTOMOUNT for the volume. To check this type the following command after running diskpart in the administrator command prompt 

DISKPART> automount

Automatic mounting of new volumes is disabled.

To enable AUTOMOUNT run the following command

DISKPART> automount enable

Reboot the server and the volume will not go offline. 

Hyper-V, Cluster validation, BCD , status 87, 0x80004005,

Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Article ID: 2419286 - Last Review: 11/09/2010 14:23:00 - Revision: 3.0

Windows Server 2008 Datacenter, Windows Server 2008 Enterprise, Windows Server 2008 R2 Datacenter, Windows Server 2008 R2 Enterprise, Windows Server 2008 R2 for Itanium-Based Systems, Windows Server 2008 R2 Foundation, Windows Server 2008 R2 Standard, Windows Server 2008 Service Pack 2, Windows Server 2008 Standard

  • KB2419286