HP 3PAR Windows 2012 and Windows Server 2008 Implementation Guide

HP SPOCK
WARNING! Failing to comply with the procedures outlined in “Upgrading to HP 3PAR OS 3.1.1
or 3.1.2” (page 8) or “Upgrading to HP 3PAR OS 3.1.3” (page 9) may result in the following
issue:
On the first Windows Server 2008, 2008 R2, 2012, or 2012 R2 reboot following an HP 3PAR
StoreServ Storage array firmware upgrade (whether a major upgrade or an MU update within the
same release family) the Windows server will mark the HP 3PAR LUNs as offline, but the data
remains intact.
This behavior is seen only in the following cases:
• HP 3PAR LUNs are seen by non-clustered Windows servers.
• HP 3PAR LUNs are used in Microsoft Failover Clustering, but are not configured as shared
storage in the Failover Cluster..
The behavior of LUNs being marked offline is not seen if HP 3PAR LUNs are configured as shared
storage in a Microsoft Failover Cluster.
Note: When the HP 3PAR LUNs are marked offline, the Windows server administrator must follow
these steps so that the applications can access the HP 3PAR LUNs:
1. Click Computer Management→Disk Management.
2. Right-click each of the HP 3PAR LUNs.
3. Set the LUNs as online.
Upgrading to HP 3PAR OS 3.1.1 or 3.1.2
Before upgrading to HP 3PAR OS 3.1.1 or 3.1.2, HP recommends the execution of Microsoft
KB2849097 on every Windows Server 2008/2012 host connected to an HP 3PAR array prior
to performing an initial array firmware upgrade. Subsequently, the script contained in KB2849097
will have to be rerun on a host each time new HP 3PAR LUNs are exported to that host.
KB2849097 is a Microsoft PowerShell script designed to modify the Partmgr Attributes registry
value that is located at HKLM\System\CurrentControlSet\Enum\SCSI\<device>\
<instance>\Device Parameters\Partmgr. The value is responsible for the state of HP
3PAR LUNs following an array firmware upgrade. The script sets the value to "0" essentially
changing its policy to "online."
NOTE: The following procedure will ensure proper execution of KB2849097, which will prevent
the HP 3PAR LUNs from being marked offline when the Windows server is rebooted following an
array firmware upgrade.
1. Windows Server 2008/2012 requires the PowerShell execution policy to be changed to
RemoteSigned to allow execution of external scripts. This must be done before the script is
executed. To change the PowerShell execution policy, open the PowerShell console and
issue the following command:
Set-ExecutionPolicy RemoteSigned
You might be prompted to confirm this action by pressing y.
2. The next step is to save the script as a .ps1 file to a convenient location and execute it by
issuing the following command in a PowerShell console window:
C:\ps_script.ps1
The above command assumes that the script has been saved to C: under the name
ps_script.ps1.
8 Introduction