Troubleshooting
Problem
The log /var/log/messages shows repetitive messages against multipathd.
Symptom
Example messages errors:
Dec 28 03:51:48 hmc01 multipathd[937]: sda: failed to get udev uid: Invalid argument
Dec 28 03:51:48 hmc01 multipathd[937]: sda: failed to get sysfs uid: Invalid argument
Dec 28 03:51:48 hmc01 multipathd[937]: sda: failed to get sgio uid: No such file or directory
Cause
There have been reported issues with Linux installations in VMware client deployments where multipathd messages will report in the operating system. Virtual HMCs on VMware began reporting the multipathd messages at V9R2M950. It is unknown the full impact of what the errors cause to the running HMC operating system. The workaround provided in this tip is suggested as a remediation.
Environment
VMware virtual appliances
HMC Version 9 Release 2 M950
Diagnosing The Problem
This tip applies when the multipathd errors are present in the messages file.
Resolving The Problem
Edit the the virtual machine definition from the VMware ESXi Virtual Machines menus.
Select the virtual machine and navigate to Edit -> VM options > Advanced twisty -> Configuration Parameters -> Edit Configuration. Then :
In the Name column, enter disk.EnableUUID.
In the Value column, enter TRUE.
Beginning of procedure:
Click "Edit" to "Edit this virtual machine's settings"
Toggle to the "VM Options" button, then click "Advanced"
Once Advanced is expanded, click "Edit Configuration"
Click "Add parameter"
Scroll to the end and "Click to edit the key"
Enter "disk.EnableUUID" under Key and TRUE under Value, then click OK to save the change
In order for the change to take effect the HMC should be shutdown/halted, then use VMware to click "Power off"
Then click "Power on" to pick up the new disk.EnableUUID setting and bring the HMC back up.
End of procedure.
Document Location
Worldwide
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Document Information
Modified date:
22 September 2021
UID
ibm16404376