If you are configuring a cluster with less than 2 datastores, you will receive an HA warning “The number of heartbeat datastores for host is 1, which is less than required: 2” You can add an option to the HA Advanced Options to supress this warning. Log in to vCenter Server Right-click the cluster and click Edit Settings Click vSphere HA > Advanced Options Under Option, add an entry for das.

When setting up a cluster for testing you may not have 2 nics to use for management. to bypass the warning you can configure HA to not alert you for this issue. To perform the steps in the c# client. From the VMware Infrastructure Client, right-click on the cluster and click Edit Settings. Select vSphere HA and click Advanced Options. In the Options column, enter das.ignoreRedundantNetWarning In the Value column, type true Click OK.

This is a great script to keep handy. If you have multiple RDM’s on a VM and need to get the NAA_ID for them the below PowerCLI command will get you that information. 1Get-VM VMNAME| Get-HardDisk -DiskType "RawPhysical","RawVirtual" | Select Parent,Name,DiskType,ScsiCanonicalName,DeviceName,CapacityGB | fl If you then need to match the SCSI virtual disk to the Guest OS this is a great article on how to do so. KB2051606

While continuing to build out my lab for VCAP-DCA today I had to deploy the vMA (vSphere Management Assistant). Upon deployment i tried to SSH to it and unfortunately was not able to. By default SSH is turned off, perform the steps below to enable it. Logon to vMA via a Console Session Run ‘sudo vi /etc/hosts.allow’ Scroll to the very bottom and type i to insert content into the file.

I was working today on configuring NFS/Openfiler in my lab and came across an issue that my nested ESXi host’s couldn’t talk over the VSS (Standard Switch) I created. Upon further research when using nested ESXi you need to enable “Promiscuous Mode” on the VSS to allow the traffic to pass.