Category Archives: 6.0

I want vSphere HA to use a specific Management VMkernel interface


Advertise here with BSA

This comes up occasionally, customers have multiple Management VMkernel interfaces and see vSphere HA traffic on both of the interfaces, or on the incorrect interface. In some cases, customers use the IP address of the first management VMkernel interface to connect the host to vCenter and then set an isolation address that is on the […]

The post I want vSphere HA to use a specific Management VMkernel interface appeared first on Yellow Bricks.

Continue reading

Posted in 6.0, 6.5, 6.7, ha, High Availability, Server, VMware, vSphere | Comments Off on I want vSphere HA to use a specific Management VMkernel interface

vSphere HA virtual machine failed to failover error on VMs in a partitioned cluster


Advertise here with BSA

I received two questions this week around partition scenarios where after the failure has been lifted some VMs display the error message “vSphere HA virtual machine failed to failover”. The question that then arises is: why did HA try to restart it, and why did it fail? Well, first of all, this is an error […]

The post vSphere HA virtual machine failed to failover error on VMs in a partitioned cluster appeared first on Yellow Bricks.

Continue reading

Posted in 6.0, 6.5, 6.7, BC-DR, failure scenario, ha, Server, testing, VMware, vSphere | Comments Off on vSphere HA virtual machine failed to failover error on VMs in a partitioned cluster

HA Admission control: How can I check how much reserved resources are used?


Advertise here with BSA

I had this question twice in the past three months, so somehow this is something which isn’t clear to everyone. With HA Admission Control you set aside capacity for fail-over scenarios, this is capacity which is reserved. But of course VMs also use reservations, how can you see what the total combined used reserved capacity […]

The post HA Admission control: How can I check how much reserved resources are used? appeared first on Yellow Bricks.

Continue reading

Posted in 6.0, 6.5, 6.7, admission control, BC-DR, Book, cloud, drs, ha, Server, u1, vSphere | Comments Off on HA Admission control: How can I check how much reserved resources are used?

What happened to MaxCostPerEsx41DS? It doesn’t seem to work in vSphere 6.x?


Advertise here with BSA

Today I received a question which also caught me by surprise, someone updated from vSphere 5.0 and he noticed that when doing an SDRS Maintenance Mode that the setting MaxCostPerEsx41DS did not work. This setting actually limits the number of active SvMotions on a single datastore. You can imagine that this can be desired when […]

The post What happened to MaxCostPerEsx41DS? It doesn’t seem to work in vSphere 6.x? appeared first on Yellow Bricks.

Continue reading

Posted in 6.0, 6.5, 6.7, limit, MaxCostPerEsx41DS, MaxCostPerEsx6xDS, Storage, SvMotion, vSphere | Comments Off on What happened to MaxCostPerEsx41DS? It doesn’t seem to work in vSphere 6.x?

Trigger APD on iSCSI LUN on vSphere


Advertise here with BSA

I was testing various failure scenarios in my lab today for the vSphere Clustering Deepdive session I have scheduled for VMworld. I needed some screenshots and log files of when a datastore hit an APD scenario, for those who don’t know APD stands for all paths down. In other words: the storage is inaccessible and […]

The post Trigger APD on iSCSI LUN on vSphere appeared first on Yellow Bricks.

Continue reading

Posted in 6.0, 6.5, 6.7, apd, ha, High Availability, PDL, Server, Storage, VMware, vsphere ha | Comments Off on Trigger APD on iSCSI LUN on vSphere

Module MonitorLoop power on failed error when powering on VM on vSphere


Advertise here with BSA

I was playing in the lab for our upcoming vSphere Clustering Deepdive book and I ran in to this error when powering on a VM. I had never seen it before myself, so I was kind of surprised when I figured out what it was referring to. The error message is the following: Module MonitorLoop […]

The post Module MonitorLoop power on failed error when powering on VM on vSphere appeared first on Yellow Bricks.

Continue reading

Posted in 6.0, 6.5, 6.7, error, ESXi, Management & Automation, Server, Various, vSphere | Comments Off on Module MonitorLoop power on failed error when powering on VM on vSphere

Disable DRS for a VM


Advertise here with BSA

I have been having discussions with a customer who needs to disable DRS on a particular VM. I have written about disabling DRS for a host in the past, but not for a VM, well I probably have at some point but that was years ago. The goal here is to ensure that DRS won’t […]

The post Disable DRS for a VM appeared first on Yellow Bricks.

Continue reading

Posted in 6.0, 6.5, drs, Server, vSphere | Comments Off on Disable DRS for a VM

Changing advanced vSphere FT related settings, is that supported?


Advertise here with BSA

This week I received a question around changing the values for vSphere FT related advanced settings. This customer is working on an environment where uptime is key. Of course the application layer is one side, but they also want to have additional availability from an infrastructure perspective. Which means vSphere HA and vSphere FT are […]

Changing advanced vSphere FT related settings, is that supported?” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

Continue reading

Posted in 6.0, 6.5, availability, BC-DR, ft, High Availability, VMware, vSphere | Comments Off on Changing advanced vSphere FT related settings, is that supported?

Changing advanced vSphere FT related settings, is that supported?


Advertise here with BSA

This week I received a question around changing the values for vSphere FT related advanced settings. This customer is working on an environment where uptime is key. Of course the application layer is one side, but they also want to have additional availability from an infrastructure perspective. Which means vSphere HA and vSphere FT are […]

Changing advanced vSphere FT related settings, is that supported?” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

Continue reading

Posted in 6.0, 6.5, availability, BC-DR, ft, High Availability, VMware, vSphere | Comments Off on Changing advanced vSphere FT related settings, is that supported?

vSphere HA heartbeat datastores, the isolation address and vSAN


Advertise here with BSA

I’ve written about vSAN and vSphere HA various times, but I don’t think this has been explicitly called out before. Cormac and I were doing some tests this week and noticed something. When we were looking at results I realized I described it in my HA book a long time ago, but it is so […]

vSphere HA heartbeat datastores, the isolation address and vSAN” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

Continue reading

Posted in 6.0, 6.5, 6.6, ha, Server, Software Defined, Storage, Virtual SAN, vsan, vSphere | Comments Off on vSphere HA heartbeat datastores, the isolation address and vSAN