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Category Archives: KBTV

From the VMware KBTV Youtube Channel

How to backup and restore the embedded vCenter Server 6.0 vPostgres database

This video demonstrates how to backup and restore an embedded vCenter Server 6.0 vPostgres database. Backing up your database protects the data stored in your database. Of course, restoring a backup is an essential part of that function.

This follows up on our recent blog & video: How to backup and restore the embedded vCenter Server Appliance 6.0 vPostgres database

Note: This video is only supported for backup and restore of the vPostgres database to the same vCenter Server. Use of image-based backup and restore is the only solution supported for performing a full, secondary appliance restore.

How to backup and restore the embedded vCenter Server Appliance 6.0 vPostgres database

This video demonstrates how to backup and restore an embedded vCenter Server Appliance 6.0 vPostgres database. Backing up your database protects the data stored in your database. Of course, Restoring a backup is an essential part of that function.

Note: This video is only supported for backup and restore of the vPostgres database to the same vCenter Server Appliance. Use of image-based backup and restore is the only solution supported for performing a full, secondary appliance restore.

Troubleshooting “SSO log directory full” in vCenter Server Appliance 6.0

This video demonstrates how to troubleshoot “SSO log directory full” warnings in vCenter Server Appliance 6.0. This is a known issue affecting vCenter Server Appliance 6.0, and currently, there is no resolution. You see that the /storage/log directory is highly utilized in an Embedded vCenter Server Appliance or Platform Controller Server Appliance 6.0.

To work around this issue, reduce the maximum backup size and the maximum backup index in the log4j.properties file.

Note: In external Platform Service Controller (PSC) environments, log in to the Platform Service Controller instead to make the suggested changes.

How to recreate a missing vmdk AKA virtual machine disk descriptor file

This video tells you how to recreate a missing virtual machine disk descriptor, also know as the vmdk file.

Note: VMware recommends to attempt to restore the missing descriptor file from backups if possible. If this is not possible, proceed with recreating the virtual machine disk descriptor file.

Watch the video to see the steps taken to create a virtual machine disk descriptor file:

  • Identify the size of the flat file in bytes.
  • Create a new blank virtual disk that is the same size as the original. This serves as a baseline example that is modified in later steps.
  • Rename the descriptor file (also referred to as a header file) of the newly-created disk to match the name of the original virtual disk.
  • Modify the contents of the renamed descriptor file to reference the flat file.
  • Remove the leftover temporary flat file of the newly-created disk, as it is not required.


This procedure will not work on virtual disks configured with a Para-virtualized SCSI controller in the virtual machine

How to install Windows in VMware Fusion using Easy Install

This video demonstrates how to install Windows guest operating system using the Easy Install feature in VMware Fusion.

Before creating a virtual machine, you must obtain the operating system and any necessary product keys for installation in that virtual machine. VMware Fusion does not come with any operating systems to install in virtual machines you create.

This method assumes that you are using a physical CD or a disk image (.iso / .cdr /.dmg file). You cannot create a Windows virtual machine by using .exe files downloaded from Microsoft, as those files need to be run on a Windows PC.

Troubleshooting Virtual SAN Providers status- Disconnected

This video demonstrates how to troubleshoot Virtual SAN Providers which display the status as disconnected in the vSphere Web Client. This issue occurs if the SMS certificate for vCenter server is expired.

To resolve this issue, expired certificate will be removed and a new certificate will be generated.

Troubleshooting Virtual SAN on-disk format upgrade to 3.0 failures

This video demonstrates how to troubleshoot Virtual SAN on-disk format upgrade to 3.0, which may fail in small Virtual SAN clusters or ROBO/stretched clusters.

Attempting an on-disk upgrade in certain VSAN configurations may result in failure. Configurations that can cause these errors include:

  • The stretched VSAN Cluster consists of two ESXi Hosts and the Witness Node (ROBO configuration)
  • Each Host in the Stretched Cluster contains a single VSAN Disk Group
  • A Virtual SAN cluster consists of three normal nodes, with one disk group per node
  • A Virtual SAN cluster is very full, preventing the “full data migration” disk-group decommission mode

To allow an upgrade to proceed in these configurations, a compromise as to availability must be made. Data accessibility will be maintained, but the redundant copy of the data will be lost and rebuilt during the upgrade process. As a result, data will be exposed to faults and failures such as the loss of a disk on another node may result in data loss. This exposure to additional failure risk is referred to as “reduced redundancy,” and must be manually specified in the Ruby vSphere Console (RVC) to allow the upgrade to proceed. It is not possible to specify reduced redundancy when using the vSphere Web Client to start the upgrade.

Caution: During upgrade, a single point of failure is exposed. Follow all VMware best practices, and your business practices, regarding the backup of important data and virtual machines.

Troubleshooting Virtual SAN 6.2 on disk upgrades which fail after 10%

This video demonstrates how to troubleshoot Virtual San 6.2 upgrades which fail after 10% of the upgrade procedure. The resolution provided in this video tutorial will be useful to you if you experience the following symptoms within your VMware Virtual SAN environment:

  • When upgrading VMware Virtual SAN (VSAN) to version 6.2, the Virtual SAN Disk Format Conversion task fails at 10%.
  • In the vSphere Web Client, you see an error similar to:

    A general system error occurred: Failed to realign following Virtual SAN objects, due to being locked or lack of vmdk descriptor file which requires manual fix
  • The Convert disk format for Virtual SAN task fails with a General Virtual SAN error status.

When upgrading the on-disk format, during the 10% – 15% phase, Virtual SAN realigns objects to prepare them for new features. The process is performed in two steps:

        • In the first step, Virtual SAN realigns objects and their components to have a 1 MB address space. The process fails in this step if the cluster is unstable or if there is not enough disk space.
        • In the second step, Virtual SAN realigns vsanSparse objects to be 4k aligned. The process fails if there are objects which cannot be upgraded to version 2.5.

An object will fail to upgrade under these conditions:

        • The object is left behind and no longer referenced by anything.
        • The disk chain is not complete or is corrupted.

For additional information, see VMware Knowledge Base article Virtual SAN 6.2 on disk upgrade fails at 10% (2144881).

How to capture performance statistics using Virtual SAN Observer for Virtual SAN

This video tutorial demonstrates and shows how to capture performance statistics using Virtual SAN Observer for VMware Virtual SAN. For additional information see VMware Knowledge Base article Enabling or capturing performance statistics using Virtual SAN Observer for VMware Virtual SAN (2064240).

While watching this video you will see the necessary steps to launch, collect and display Virtual SAN Observer (VSAN Observer) performance charts and information for VMware Virtual SAN (VSAN).

VSAN Observer is designed to capture performance statistics for a Virtual SAN Cluster and provide access through a web browser and capture the statistics for customer use or for VMware Technical Support.

How to configure VMware vRO integration with vRA – KBTV Webinars

In this latest KBTV Webinar you will learn how to configure VMware vRealize Orchestrator (vRO) integration with VMware vRealize Automation (vRA).

This year we will be continuing our KBTV Webinars video series wherein staff members from our Technical Support teams cover and deep dive into a wide range of topics. To start us off, here is a new video which discusses and demonstrates how to configure VMware vRO integration with vRA.

Covered in this video demonstration:

  • Examples of a Simple Installation versus Distributed / HA Installation
  • Advanced Service Designer versus IaaS Extensibility
  • Understand the ways that vRealize Orchestrator is leveraged by vRealize Automation
  • A demonstration of a basic integration configuration between VMware vRealize Orchestrator integration with VMware vRealize Automation