CVM: VMWare CFS clustered configuration is showing additional disk entries as disk.EnableUUID is not set to TRUE

Problem

The environment consists of a 4-node CVM/CFS VMWare cluster configuration. The server named "node-04" is showing additional disk entries for the same disks compared to the other clustered nodes.

In addition, VxVM disk flags 'lmissing' and 'udid_mismatch' are also shown.

node-04 # vxdisk list
DEVICE          TYPE            DISK         GROUP        STATUS
sba-emm-app-pro_vmdk0_0 auto:sliced     sba-emm-app-pro_vmdk0_0  mmdbdg20     online shared lmissing
sba-emm-app-pro_vmdk0_1 auto:sliced     sba-emm-app-pro_vmdk0_1  mmdata1dg20  online shared lmissing
sba-emm-app-pro_vmdk0_2 auto:sliced     sba-emm-app-pro_vmdk0_2  mmdatadg20   online shared lmissing
sda          auto:LVM        -            -            LVM
sdb          auto:sliced     -            (mmdatadg20) online shared udid_mismatch
sdc          auto:sliced     -            (mmdbdg20)   online shared udid_mismatch
sdd          auto:sliced     -            (mmdata1dg20) online shared udid_mismatch

 

Error Message

node-01 is showing less devices like node-02 and node-03:

# vxdisk -eo alldgs list
DEVICE       TYPE           DISK        GROUP        STATUS               OS_NATIVE_NAME   ATTR
sba-emm-app-pro_vmdk0_0 auto:LVM       -            -           LVM                  sda              -
sba-emm-app-pro_vmdk0_1 auto:sliced    sba-emm-app-pro_vmdk0_0  mmdbdg20    online shared        sdc              -
sba-emm-app-pro_vmdk0_2 auto:sliced    sba-emm-app-pro_vmdk0_1  mmdata1dg20 online shared        sdd              -
sba-emm-app-pro_vmdk0_3 auto:sliced    sba-emm-app-pro_vmdk0_2  mmdatadg20  online shared        sdb              -
 

Cause

As this is a VMWare environment, is the 'disk.EnableUUID' parameter set to TRUE in the VMware Virtual Machine Properties for the disks?

In this instance, the 'disk.EnableUUID' is NOT set for node-04, hence the additional DMPNODE entries shown by vxdisk list.
 

In VMWare environment it is essential to set the disk.EnableUUID parameter for each VM to "TRUE".

This step is necessary so that the VMDK always presents a consistent UUID to the VM (Virtual Machine), thus allowing the disk to be correctly presented to VxVM and Veritas DMP.

Solution

For each of the virtual machine nodes (VMs) that will be participating in the cluster, follow the steps below from the vSphere client, to enable UUIDs for disks on a virtual machine
    
1. Power off the guest.
2. Select the guest and select Edit Settings.
3. Select the Options tab on top.
4. Select General under the Advanced section.
5. Select the Configuration Parameters... on right hand side.
6. Check to see if the parameter disk.EnableUUID is set, if it is there then make sure it is set to TRUE.
    
If the parameter is not there, select Add Row and add it.
    
7. Power on the guest.

With the VMWare disk.EnableUUID paramater set for node-04, disk groups import successfully once the GUEST is booted.

node-04 # vxdisk list
DEVICE          TYPE            DISK         GROUP        STATUS
sba-emm-app-pro_vmdk0_0 auto:LVM        -            -            LVM
sba-emm-app-pro_vmdk0_1 auto:sliced     sba-emm-app-pro_vmdk0_0  mmdbdg20     online shared
sba-emm-app-pro_vmdk0_2 auto:sliced     sba-emm-app-pro_vmdk0_1  mmdata1dg20  online shared
sba-emm-app-pro_vmdk0_3 auto:sliced     sba-emm-app-pro_vmdk0_2  mmdatadg20   online shared

NOTE: No additional dmpnodes are visible by the "vxdisk list" output