Solved

Cluster will not fail over when all paths to a disk fails on active node but not inactive node.

Posted on 2013-06-26
12
519 Views
Last Modified: 2013-07-21
Hi all,

We are setting up a new Server 2008 R2 cluster with two nodes. Each node is presented two LUNs from our SAN, one for the Quorum drive and another for application data.

We were testing failover today and if we removed all paths to the application data LUN for ONLY the active node but not the inactive node, we expected the cluster to failover to the inactive node since it was still able to see the LUN. Instead, however, the cluster did not fail over to node 2 instead it stayed active on the first node but simply marked the application LUN as "failed" and would not failover to the inactive node.

Does anyone know if this is expected behavior and if not, how to fix?

Thanks
0
Comment
Question by:ktpoitm
  • 5
  • 5
12 Comments
 
LVL 27

Accepted Solution

by:
Steve earned 334 total points
Comment Utility
clusters with only 2 nodes are a pain as you normally need a majority to make cluster decisions. as a majority is impossible with 2 nodes it just doesn't work properly.

have you set up an independent witness server to provide a 3rd 'vote' in the cluster?

Could you confirm what cluster config as shown in the link below you have so we can help appropriately?

http://technet.microsoft.com/en-us/library/cc731739.aspx
0
 
LVL 1

Author Comment

by:ktpoitm
Comment Utility
The quorum configuration is currently "node and disk majority" and we do not have any witness servers configured. This will be the first in 3 clusters would we need a separate witness server for all three clusters or can the witness server be witness to 3 separate clusters?
0
 
LVL 27

Assisted Solution

by:Steve
Steve earned 334 total points
Comment Utility
as there are only 2 nodes you will need a witness of some form to cast the deciding vote in cluster events.

I believe witness servers can generally only function for one cluster but I've never tried so cannot be sure.
0
 
LVL 1

Author Comment

by:ktpoitm
Comment Utility
All the nodes for these clusters are physical blades, would there be any issues with each witness server being a VM?
Also, would the LUNs need to be presented to the witness servers as well?
0
 
LVL 18

Assisted Solution

by:Netflo
Netflo earned 166 total points
Comment Utility
Just to add one vital question to make sure your cluster works correctly. When you created the cluster, did it pass validation? Or were the errors produced ignored?

Please see the following link for further reading: http://technet.microsoft.com/en-us/library/cc732035(v=ws.10).aspx
0
Enabling OSINT in Activity Based Intelligence

Activity based intelligence (ABI) requires access to all available sources of data. Recorded Future allows analysts to observe structured data on the open, deep, and dark web.

 
LVL 1

Author Comment

by:ktpoitm
Comment Utility
Yes the cluster did pass validation.
0
 
LVL 27

Expert Comment

by:Steve
Comment Utility
All the nodes for these clusters are physical blades, would there be any issues with each witness server being a VM?
Also, would the LUNs need to be presented to the witness servers as well?

Yes it would be an issue. the witness server(s) should be independent of the cluster and should not be affected if one or more nodes fail.
0
 
LVL 1

Author Comment

by:ktpoitm
Comment Utility
I've requested that this question be deleted for the following reason:

We decided to use a different method for the disks in the cluster.
0
 
LVL 27

Expert Comment

by:Steve
Comment Utility
Although you may not have got the answer you wanted, a valid answer was provided and the question shouldn't be deleted.
0
 
LVL 1

Author Comment

by:ktpoitm
Comment Utility
I've requested that this question be closed as follows:

Accepted answer: 0 points for ktpoitm's comment #a39283819

for the following reason:

We are not going to use the witness server for cluster failover.
0
 
LVL 27

Expert Comment

by:Steve
Comment Utility
Does anyone know if this is expected behavior and if not, how to fix?

Responses 39281523 & 39281751 identified the issue and offered the recommended solution. Although you chose not to follow the recommendations, it was still a valid solution to your query.
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

OfficeMate Freezes on login or does not load after login credentials are input.
Possible fixes for Windows 7 and Windows Server 2008 updating problem. Solutions mentioned are from Microsoft themselves. I started a case with them from our Microsoft Silver Partner option to open a case and get direct support from Microsoft. If s…
This tutorial will give a an overview on how to deploy remote agents in Backup Exec 2012 to new servers. Click on the Backup Exec button in the upper left corner. From here, are global settings for the application such as connecting to a remote Back…
This tutorial will show how to configure a new Backup Exec 2012 server and move an existing database to that server with the use of the BEUtility. Install Backup Exec 2012 on the new server and apply all of the latest hotfixes and service packs. The…

743 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

13 Experts available now in Live!

Get 1:1 Help Now