Category Archives: 6.0

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


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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 […]

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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?


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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 […]

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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


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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 […]

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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


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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 […]

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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


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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 […]

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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?


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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.

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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?


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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.

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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


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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.

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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

vSAN 6.x customer? vSphere 6.0 Update 3 is out


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Are you a vSAN 6.x customer? vSphere 6.0 Update 3 is out! There are a bunch of important fixes and improvements (checksumming performance for instance) in Update 3, so I would highly recommend looking in to it and testing it out. vSAN Details: https://kb.vmware.com/kb/2149127 vCenter Server download: https://my.vmware.com/web/vmware/details?downloadGroup=VC60U3&productId=491&rPId=14487 ESXi download: https://my.vmware.com/web/vmware/details?downloadGroup=ESXI60U3&productId=491&rPId=14487

vSAN 6.x customer? vSphere 6.0 Update 3 is out” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.0, 6.2, Server, Software Defined, Storage, update 3, Virtual SAN, vsan, vSphere | Comments Off on vSAN 6.x customer? vSphere 6.0 Update 3 is out

Virtually Speaking Podcast – vSAN Customer Use Cases


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As John Nicholson was traveling in and around New Zealand I was asked by Pete if I could co-host the Virtually Speaking Podcast again. It is always entertaining to join, Pete is such a natural when it comes to these things. I euuh, well I do my best to keep up with him :). Below […]

Virtually Speaking Podcast – vSAN Customer Use Cases” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.0, 6.1, 6.2, 6.5, BC-DR, podcast, Server, Software Defined, Storage, usecase, Virtual SAN, virtually speaking podcast, VMware, vsan, vSphere | Comments Off on Virtually Speaking Podcast – vSAN Customer Use Cases