[Webinar] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

Hyper-V guest systems has disappeared from the Host's VM Console

Posted on 2009-05-06
9
Medium Priority
?
3,125 Views
Last Modified: 2013-11-06
I have a win2008 Std 64bit server with the Hyper-v Role Installed and two guest systems in the VM Console (a win03r2 Std running as a member server and a win08 Std running as a pdc  both 32bit)
TrendMicro WFBS is installed and controlled on the PDC and pushed to the member server and the host system.
Everything has been running smoothly and then suddenly after a controlled shutdown of the host (the guests werent shutdown manually first) the VM console had lost the guest systems.
My technician panicked and created new vms and pointed them to the virtual hard disks from the former machines. Problem is they seem to be obsolete version as if the had returned to former snapshots  which by the way are also missing of course.

Questions
1)      Any clues as to what might have happened?
2)      Whats the best practice for reclaiming my guests?

THX in advance
0
Comment
Question by:spooky-mulder
  • 3
  • 3
6 Comments
 
LVL 1

Expert Comment

by:bjinfo
ID: 24362892
Hello,

we had the same problem here, it's a known problem with Trendmicro products. You need to add the directory where you will put your virtual servers in every exclusion list in the Trendmicro configuration (real scan, manual scan, etc..) before you configure your virtual server in Hyper-V, otherwise Trendmicro deletes them and you have the phenomenon you describe.

Hope this helps.
0
 

Author Comment

by:spooky-mulder
ID: 24362998
Hi bjinfo,

That's indeed excellent info. We suspected the TM install did something like this so while recovering from the crash we avoided installing TM on the host and so far we havent experienced any problems like before. Combined with your feedback it looks like weve got the answer to our first concern. As for the second question, do you have any experience with best practice on how to reclaim the guests? In our case the .vhd, and snapshot files were available but couldnt get associated to the VMM.

Cheers,

Kenny
0
 
LVL 1

Expert Comment

by:bjinfo
ID: 24363960
Hello Kenny,
so far, in our case we had to reinstall our guests from scratch, because it happened, before we could do any backup of the virtual files, so i cannot answer your second question precisely. But the question is why you could not associate your vhf and snapshot file to the vmm. Any error code shown? If I understand you, your PDC is installed in a virtual guest, i heard somewhere that install a dc alone on an hyperV should be avoided, should always be a second one installed on another physical machine (virtually or not does not matter) for replication and recovery  purpose.  Next week i will try to do a recovery test of one virtual server,  and i will post my results here.

Best regard

Pascal  
0
Has Powershell sent you back into the Stone Age?

If managing Active Directory using Windows Powershell® is making you feel like you stepped back in time, you are not alone.  For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why.

 

Author Comment

by:spooky-mulder
ID: 24368507
Hi Pascal,

I concur that they should indeed have a second DC. Unfortunately in a few setups like SBS 08 Prem and small office/ small budget installations demanding two separate server  e.g. for sql  that option is not available.
Ill be anticipating the result of your recovery test.
THX in advance.

Cheers,
Kenny
0
 
LVL 1

Accepted Solution

by:
bjinfo earned 2000 total points
ID: 24410365
Hi Kenny,

i did a recovery test from a 140GB Data Server (which i name Virtual Server A) from one Hyper-V Server to a second Hyper-V Server, it worked without any problem, here how i did:

1) Shutdown Virtual Server A
2) Backup the whole directory containing the Virtual Server A (all files inclusiv bin data and vhd)
3) Restore the whole directory on same directory structure on Recovery Hyper-V
4) Configure a new virtual machine pointing on the restored directory (same configuration than source)
5) attach the existing vhd file
6) Start the restored virtual Server

That's it, i could access everything like it would be the original one, but i did not have any snapshot in my case. So could be interesting to know if you your customer had error codes when he tried to attach the vhd. Another point, did he have all snapshots and did he merge them to the vhd file before attaching it. Here is a good article describing a way to do it (i did not try this myself, so not 100% sure if it's working):

http://itproctology.blogspot.com/2008/06/how-to-manually-merge-hyper-v-snapshots.html

Hope this helps.

Best regards

Pascal
0
 

Author Comment

by:spooky-mulder
ID: 24449284
Hi Pascal,

The guide to manually merge the snapshots did the trick. It might not be elegant, but it was definitely efficient.
Thanks allot for your answers, Ill shut down the question and assign you all the points.

Best regards,

Kenny


0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

A look into Log Analysis and Effective Critical Alerting.
Giving access to ESXi shell console is always an issue for IT departments to other Teams, or Projects. We need to find a way so that teams can use ESXTOP for their POCs, or tests without giving them the access to ESXi host shell console with a root …
This tutorial will walk an individual through locating and launching the BEUtility application and how to execute it on the appropriate database. Log onto the server running the Backup Exec database. In a larger environment, this would generally be …
In this video tutorial I show you the main steps to install and configure  a VMware ESXi6.0 server. The video has my comments as text on the screen and you can pause anytime when needed. Hope this will be helpful. Verify that your hardware and BIO…
Suggested Courses
Course of the Month20 days, 12 hours left to enroll

865 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