SHIFT-WIKI - Sjoerd Hooft's InFormation Technology
This WIKI is my personal documentation blog. Please enjoy it and feel free to reach out through blue sky if you have a question, remark, improvement or observation. See below for the latest additions, or use the search or tags to browse for content.
Hyper-V Disks Load and Performance
Summary: How to measure Hyper-V 2 disk load and performance.
Date: Around 2020
Refactor: 1 March 2025: Checked links and formatting.
For a project I need how much bandwidth was required considering hoe much data was written to disk (All VMs were to be replicated to a different location). As I soon find out is that hyper-V does not keep this kind of data stored somewhere as vCenter does in a vSphere environment. Since Hyper-V 2 there are a few commands available to see the disk load end measure this. However, I found that the commands are unreliable, and especially in a Virtual Machine Manager environment where you run into name collision problems between VMM and Hyper-V commandlets (note that you sometimes can prefix commands like Hyper-V\get-VM).
Grow VMFS Datastore with NetApp OnCommand Storage Manager
Summary: How to grow a VMWF datastore.
Date: Around 2013
Refactor: 1 March 2025: Checked links and formatting.
This is a rewrite of a previous article about growing VMFS datastores. That article was a combination with NetApp's OnTap 7.3.4, but we upgraded that to 8.1… and now FilerView is no longer supported (NetApp login required), which means we had to switch to a different tool, and NetApp recommendation was using the “NetApp OnCommand Storage Manager 2.0.1”.
So just a short recall, to resize a datastore we first need to resize the volume and LUN, after which we can resize increase the size of the datastore which is an unchanged procedure.
Grow VMFS Datastore
Summary: How to grow a VMWF datastore.
Date: Around 2012
Refactor: 1 March 2025: Checked links and formatting.
With the introduction of vSphere 4 VMware introduced an extra way for increasing the size of VMFS datastores. In previous versions you could add extra extents to increase the size, since vSphere 4 there is also the option available to just grow the datastore. There is one catch though, the space should be adjacent to the current datastore. Of course that is usually not the case but in our environment the storage is on a SAN from NetApp which uses WAFL, which never uses adjacent space in the first place, but tells that to the SAN clients anyway. So increasing the size of a VMFS datastore with NetApp SAN storage has become really easy:
Remove Group Policies
Summary: How to temporary remove group policies from your Windows pc.
Date: Around 2020
Refactor: 1 March 2025: Checked links and formatting.
In case group policies are bothering you and you are an administrator on your local PC you could temporarily remove them:
- Go to C:\Windows\System32
- Remove the folder ~GroupPolicies
- Wait a minute
- Open a command prompt
- Issue the command:
- gpupdate /force
The group policies are now gone for a while, just until the domain policy will put them back in place.
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