Solved

Hyper-V Guest OS newer than Host OS

Posted on 2014-01-02
8
527 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
  • 3
  • 3
  • 2
8 Comments
 
LVL 91

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 56

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
 
LVL 91

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
Are end users causing IT problems again?

You’ve taken the time to design and update all your end user’s email signatures, only to find out they’re messing up the HTML, changing the font and ruining the imagery. What can you do to prevent this? Find out how you can save your signatures from end users today.

 
LVL 56

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 56

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 91

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

Does Powershell have you tied up in knots?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

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

Suggested Solutions

Using the Hyper-V Manager requires administrator rights. This guide shows how to add shortcuts and Start Screen tiles for normal users to quickly connect to local virtual machines rather than using the recommended Remote Desktop connection.
Exchange server is not supported in any cloud-hosted platform (other than Azure with Azure Premium Storage).
This tutorial will give a short introduction and overview of Backup Exec 2012 and how to navigate and perform basic functions. Click on the Backup Exec button in the upper left corner. From here, are global settings for the application such as conne…
This tutorial will walk an individual through setting the global and backup job media overwrite and protection periods in Backup Exec 2012. Log onto the Backup Exec Central Administration Server. Examine the services. If all or most of them are stop…

948 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

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now