vSAN 8 Update 2 – what’s new on technical level

Earlier this month I had the opportunity to participate in the VMware Exclusive Blogger Early Access Program. This is where VMware experts share news and upcoming features for products before the actual release date.
I would like to thank Pete Kohler and John Nicholson for the feature briefing on the release of vSAN 8 Update 2. I’d also like to thank Heather Haley from VMware’s global communications team and Corey Romero for helping to make it happen.

[This blogpost was under embargo until 22nd of August 5:00 AM PDT (14:00 CEST)]

VMware vSAN 8 Update 2 delivers a range of new features and improvements in flexibility, performance and ease of use.

New ESA Features at a glance

  • vSAN ESA storage-only clusters with vSAN Max
  • VMware Cloud Foundation Support for vSAN ESA in VCF 5.1
  • vSAN file services now available on vSAN ESA
  • New ESA Ready Node Profiles for small environments
  • Support for a new class of read intensive storage devices
  • Auto policy remediation
  • ESA Prescriptive Device Claim
  • Stretched- and 2-node-cluster impovements
  • Up to 500 VMs per host (vs 200 before)
Continue reading “vSAN 8 Update 2 – what’s new on technical level”

VMware Explore 2023 Las Vegas Live Broadcast

VMware Explore 2023 is about to start.

Tune in live on Tuesday, August 22 from 9:00 AM – 5:00 PM PDT. (18:00 CEST – 2:00 CEST)

Stay up to date on the latest VMware Explore 2023 Las Vegas announcements during the live broadcast day.

For all of you watching frum Europe: Get your coffee machines ready! It’s going to be a long night! πŸ˜‰



9:00 – 10:00
18:00-19:00General Session:
Taking a Cloud-Smart Approach to Harnessing the Power of Generative AI
11:00 – 11:45
20:00-20:45Solution Keynote:
Innovations to Accelerate Your Enterprise Cloud Transformation
12:15 – 12:45
21:15-21:45Solution Keynote:
Accelerate Application Delivery for Continuous Innovation
1:45 – 2:15
22:45-23:15Solution Keynote:
Harnessing the Power of Data and Intelligence for Today’s Changing Workplace
23:45-0:15Solution Keynote:
Everything Everywhere All at Once – Living on the Edge with VMware
4:00 – 5:00 PM1:00-2:00Keynote:
Technology Innovation Showcase

ESXi Config-Backup with PowerCLI requires HTTP

There is a really useful and convenient PowerCLI one-liner for backing up the host configuration. I have been using it for years and had also explained this in detail in an old blogpost.

Get-Cluster -Name myCluster | Get-VMHost | Get-VMHostFirmware -BackupConfiguration -DestinationPath 'C:\myPath'

This is a command I always teach my students as part of my VMware courses. Backing up the host configuration is downright mandatory before making changes to the host, installing patches and drivers, or host updates. Just a few seconds of additional effort, but these configuration backups have saved me more than once from major trouble and many hours of extra work.

Recently, I was backing up host configurations in a major datacenter. Surprisingly, the command did not work on some of the vCenter instances and aborted with an error message.

Get-VMHostFirmware : 18.08.2023 12:05:49 Get-VMHostFirmware An error occurred while sending the request.
At line:1 char:28
+… et-VMHost | Get-VMHostFirmware -BackupConfiguration -DestinationPath …
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Get-VMHostFirmware], ViError
+ FullyQualifiedErrorId : Client20_SystemManagementServiceImpl_BackupVmHostFirmware_DownloadError,VMware.VimAutomation.ViCore.Cmdlets.Commands.Host.GetVMHostFirmware

To understand the error, we must first understand how the PowerCLI command works. First, a backup of the host configuration is triggered on the host via vCenter. The host stores this locally as a zipped TAR archive (.tgz). The name is configBundle-HostFQDN.tgz (example: configBundle-esx01.lab.local.tgz). The archive is then downloaded from the host in a second step. The URL for this is:


By reading the error message above, there was obviously a problem with the download of the TGZ file. With the help of the network admins, it quickly became obvious what had happened. My workstation, from which I sent the PowerCLI command, tried unsuccessfully to establish an HTTP connection to the ESXi host. But this was blocked by a firewall rule.

I was wondering why the transfer is handled using unencrypted HTTP. In the log of the firewall you can see a connection attempt to the ESXi host with HTTP and HTTPS.

Is there a way to force the download using HTTPS?

My first thought was that there might be a parameter to the command that enforces the HTTPS protocol. A query in the VMTN forum unfortunately brought some disillusionment.

It is a bit surprising that VMware uses an unencrypted protocol for this sensitive data. All the more since the PowerCLI session to vCenter already runs over HTTPS anyway. The most plausible explanation would be that it was simply ‘forgotten’ to secure the transfer via SSL with this quite old command.

So currently there is no other choice but creating a firewall rule that allows downloading via HTTP.

VMware Explore 2023 Barcelona – Registration open

Starting now, you can register for VMware Explore EMEA in Barcelona.

There is a special discount for ‘early bird’ registrations through 7/31/2023. Those with a VMUG Advantage membership will receive an additional $100 discount.

As has been the case for many years, VMware Explore EMEA will once again be held in the halls of the Fira Gran Via in Barcelona.

Attendance is not free, but it’s priceless. See my former posts below about VMware Explore / VMworld and how it can supercharge your career.


Here you can find a selection of my posts on previous VMware Explore and VMworld events.

VMware Explore EMEA 2022 – Review and Outlook

VMware-Explore EMEA is back

VMworld EU survival guide – 2019 Edition