Put ESX in Maintenance mode

Posted on 2013-11-06
Last Modified: 2013-11-06
Put ESX in Maintenance mode

I will have to shutdown an ESX servers, so that I can open it up and put a new DIMM.
the ESX server hosts about 20 VMs.
If I understand, I will just have to right-click on the ESX server in Vcenter then click "Enter Maintenance Mode" and wait for the VMs to show up under another ESX server. Then when all VMs are no longer showing up under the ESX tha was put in maintenance mode, I can go ahead and shut it down and replace the DIMM.

Well, that's the first part. The second will be just to power it back on, then right-click on it on the Vcenter and click on "Exit Maintenance mode" I believe that's what would show up as taking the ESX out of maintenance mode.
I believe  ESX servers in the cluster would balance themselves, without me moving manually the VMs.

If I am missing any steps, please advise.

Thank you
Question by:jskfan
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
LVL 22

Assisted Solution

by:Nick Rhode
Nick Rhode earned 166 total points
ID: 39628700
If you have HA and VMotion enabled when put into maintenance mode they should move off.  I am assuming you have a SAN and the allotted space and hardware needed for the VMs to move and sit comfortably?

Author Comment

ID: 39628717
yes VMs are in the SAN.

I believe physically they stay where they are, they do not move.
The only thing that will change it is that another ESX will be providing them CPU and Memory resources.

DRS is enabled , HA (I guess it is not important in this scenario since the ESX will be put in maintenance mode before shut down)
LVL 120

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 334 total points
ID: 39628753
If you put a server into Maintenance Mode, VMs will ONLY MOVE, if the DRS is set to Fully Automatic.

After Maintenance, when you have brought the server back up, EXIT Maintenance Mode, and if DRS is Fully Automatic, you will find the VMs will be re-distributed!
Portable, direct connect server access

The ATEN CV211 connects a laptop directly to any server allowing you instant access to perform data maintenance and local operations, for quick troubleshooting, updating, service and repair.


Author Comment

ID: 39628821
Correct... Our DRS is set to Fully Automated

Author Comment

ID: 39628822
Migration is set to Aggressive.
LVL 120

Accepted Solution

Andrew Hancock (VMware vExpert / EE MVE^2) earned 334 total points
ID: 39629009
The moment you Right Click Enter Maintence Mode, they should start to move...

just remember to disconnect all floppy disk and cdroms, and iso images.

Author Closing Comment

ID: 39629357
Thank you for your Help Guys!

Featured Post

Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article will show you how to create an ISO CD-ROM/DVD-ROM image (*.iso), and MD5 checksum signature, for use with VMware vSphere Hypervisor 6.5 (ESXi 6.5). It's a good idea to compare checksums, because many installations fail because of a corr…
In this article, I will show you HOW TO: Create your first Windows Virtual Machine on a VMware vSphere Hypervisor 6.5 (ESXi 6.5) Host Server, the Windows OS we will install is Windows Server 2016.
Teach the user how to install and configure the vCenter Orchestrator virtual appliance Open vSphere Web Client: Deploy vCenter Orchestrator virtual appliance OVA file: Verify vCenter Orchestrator virtual appliance boots successfully: Connect to the …
This Micro Tutorial steps you through the configuration steps to configure your ESXi host Management Network settings and test the management network, ensure the host is recognized by the DNS Server, configure a new password, and the troubleshooting…

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question