Category: vSAN

As part of a vCenter 7 to a brand new vCenter 8 migration, the vSAN clusters had to be moved in addition to the normal clusters. When we disconnected the vSAN Witness Appliance from the old vCenter in the last process and then wanted to add it to the fault domain in the new one, we were confronted with the following error message: Although these […]

vSphere 7 to 8 updates are slowly in full swing, many customers are migrating to October ’25 -> EOL for vSphere 7. Some of my customers want a brand new vCenter right away, because some of theirs are still from version 5, the ex-colleague fiddled in the Postgre database before he quit and so on and so forth – the reasons seem to be endless. […]

Another Day another Warning inside vSAN Skyline Health. 🙂 Frequent Deletion of VMs….. Hmm….. I’ve been using vSAN since vSphere 6.7 U3 in my home lab and I’m pretty sure I deleted VMs more frequently, especially in my rookie times and never had this kind of warning in vSAN Skyline Health. Anyway, lets try to fix it! 😉 What I really like about vSphere 8 […]

Today, I saw the above warning in vSAN Skyline Health, and I would like to share the solution with you. The following information can be found under Details: Network diagnostic mode is enabled more than 24 hours (94 hours). The network diagnostic mode is only used for troubleshooting, if the troubleshooting is done, please disable it. No sooner said than done, we switch to the […]

I worked with a customer today to add 2 more nodes to their VMware vSAN Streched Cluster. Which worked for now, but we got a warning under the cluster summary: We have added the new nodes manually, it must be said at this point now. Which in turn leads to this warning, because the customer has configured its VMware vSAN Streched Cluster intially via Quickstart. […]

Today I have configured a 2 node vSAN Streched Cluster with a customer in their existing vSphere environment. For this we created our own cluster, integrated the hosts accordingly into the existing virtual distributed switches and configured HA & DRS. Then it was about the vSAN configuration, for this the customer has 2 disk groups per host with 1x 1.6TB cache and 3x 3.84TB capacity […]

Not only the vSphere 8 update is currently pending for many, but also the vSAN must be updated accordingly. Especially with regard to vSAN Streched or ROBO clusters with a Witness Appliance. The vSAN 8 itself comes with the vSphere 8 update, furthermore the disk format version as well as vDS version have to be upgraded. As far as the vSAN Witness Appliance is concerned, […]