HP MPIO Full Featured DSM for P6x00 family of Disk Arrays 4.04.00 Installation and Reference Guide (757324-001, May 2014)

C Troubleshooting
This appendix discusses some of the common problems that you may encounter while using the
HP MPIO DSM. It also describes how to troubleshoot these problems.
Problem:
HP MPIO DSM fails to load and displays a yellow-bang in the Device Manager screen.
Solution:
To troubleshoot this problem, complete one of the following:
• Verify if the Multi-path I/O feature is enabled. If not, enable the Multi-path I/O feature. To do
this, go to Server Manager and select Roles & Features > Features > Multipath I/O.
Problem:
HP MPIO DSM fails to manage the disk devices.
Solution:
To troubleshoot this problem, complete the following steps:
1. Verify if the device is currently under multipath support. To do this, go to Start, and select
MPIO. Verify the existence of the corresponding device hardware ID in the MPIO-ed devices
tab.
2. If the hardware ID is not present, do one of the following:\
• Add the corresponding hardware ID.
• Reinstall the HP MPIO DSM.
Problem:
HPDSM CLI or HP MPIO DSM Manager does not display the output.
Solution:
Run the following commands from the command prompt pointed to the folder "C:\Program
Files\Common Files\Hewlett-Packard\HP MPIO DSM\COMMON FILES\mof" and register the
following mof files:
• mofcomp hpwmi.mof
• mofcomp HPDSMHighPerfProvider.mof
• mofcomp -N:root\wmi LBPolicy.mof
• mofcomp -N:root\wmi mpdisk.mof
• mofcomp -N:root\wmi mpio.mof
• mofcomp -N:root\wmi pdo.mof
Problem:
Host does not display devices when you change the configurations of a LUN and/or HBA from
the management application. The configuration changes include adding or removing LUN(s) to or
from the host, or changing the HBA relation.
Solution:
Re-scan the host by performing the following steps:
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