Solved

Hyper-V Guest OS newer than Host OS

Posted on 2014-01-02
8
536 Views
Last Modified: 2014-11-12
Our domain has a server running Windows Server 2008 Standard.  I need to create a Virtual Machine on this box that will be running Windows Server 2008 Standard R2.

I would ordinarily update the Host OS, but this server is being accessed for data from over 100 end users.  I cannot shut down the server; hence, the need to create a VM while the Host machine is still being accessed by those end users.

Is there a problem with having a newer Guest OS than the Host OS?
0
Comment
Question by:baleman2
[X]
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
  • 3
  • 3
  • 2
8 Comments
 
LVL 95

Expert Comment

by:John Hurst
ID: 39752689
I am not certain about Hyper-V, but for VMware, it is absolutely possible to use a newer guest than host. I have done that.  Hyper-V should work because the guest is just a machine.

.... Thinkpads_User
0
 
LVL 58

Expert Comment

by:Cliff Galiher
ID: 39752723
There are indeed problems because of how Hyper-V handles device drivers and integration. Updating the host OS is really no different than any other maintenance task that requires interruption. Most OS and product patches require that various services be taken offline during the entire patch installation, and also require a reboot. How do you handle those? For services that truly need high availability, they are often deployed in farms or clusters so that an individual member can be taken offline and upgraded. This addresses almost all situations, patching, upgrades, unplanned failures, where the tolerance for interruption is very low. Hyper-V fully supports clustering and live migrations.
0
 

Author Comment

by:baleman2
ID: 39752738
To cgaliher:

Doesn't a move from "Standard" to "Standard R2" mean that the server is wiped clean and the OS is installed as though on a new server.  Installation of "R2" isn't the same as installing Windows updates, is it?
0
Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

 
LVL 95

Expert Comment

by:John Hurst
ID: 39752745
Any Windows host requires maintenance and occasional restart (meaning guest systems have to be shut down). This is the same for VMware Workstation and Server and is independent of guest.

If you want a host that stays up, then consider an VMware ESX host. That will be a better choice if the guests cannot be shutdown except rarely.

... Thinkpads_User
0
 
LVL 58

Accepted Solution

by:
Cliff Galiher earned 500 total points
ID: 39752757
The OS does indeed need to be wiped clean to go from 2008 to 2008 R2.

But hyper-v should NEVER be run alongside other roles. So enabling hyper-v on a machine where clients are accessing data would be very bad.

If this data resides in a VM and hyper-v already is on, just move the VM to a new machine for the duration of the host upgrade.

Regardless, hyper-v should run alone, and the guest should always be the same version or older; never newer.
0
 

Author Comment

by:baleman2
ID: 39752765
I don't want a Host that has to stay up indefinitely.  I understand the need for updating the Host which means shutting down the VM while updates are installed.

I want this box to stay up and running while I create a VM on it - while simultaneously satisfying (no latency) the requests of 100 domain users.  The VM must have 2008 Server R2 on it while the box just has 2008 Standard (no R2).

After the VM has been created, I intend to allocate 90 percent of the box's resources (hard drive space and Ram memory) to the newly created VM.  The 100 domain users would then begin to access the VM instead of the software on the box itself.
0
 
LVL 58

Expert Comment

by:Cliff Galiher
ID: 39752774
Well, as I said, you'll have issues running 2008 R2 as a guest on a 2008 (non r2) host. So while that probably sounded like a great plan, you'll want to go back to the drawing board and come up with a new upgrade strategy.
0
 
LVL 95

Expert Comment

by:John Hurst
ID: 39752777
You can consider VMware Server, but performance will not be as good as VMware ESX or Hyper-V.

With VMware ESX you can run any server on the guest compatibility list.  This is true for VMware Server as well.

... Thinkpads_User
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

Background Information Recently I have fixed file server permission issues for one of my client. The client has 1800 users and one Windows Server 2008 R2 domain joined file server with 12 TB of data, 250+ shared folders and the folder structure i…
Ransomware is a malware that is again in the list of security  concerns. Not only for companies, but also for Government security and  even at personal use. IT departments should be aware and have the right  knowledge to how to fight it.
This tutorial will walk an individual through locating and launching the BEUtility application to properly change the service account username and\or password in situation where it may be necessary or where the password has been inadvertently change…
To efficiently enable the rotation of USB drives for backups, storage pools need to be created. This way no matter which USB drive is installed, the backups will successfully write without any administrative intervention. Multiple USB devices need t…

738 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