topic Re: takeover - not sure why? in Network and Storage Protocols

takeover - not sure why?

kongfranon — Thu, 05 Jun 2025 07:07:37 GMT

Hi,

Hopefully posting this in right forum.

I have two netapp, and one of them tookover the other. I think it happen a few months back, I looked at all the logs and do not see any messages about it taking over.

Is there anyway to find out why? Should I just do a giveback?

Thanks

Re: takeover - not sure why?

watan — Wed, 06 Oct 2010 15:59:05 GMT

I would open a support ticket with NGS to ensure the failed node is ok. You don't want to try doing a giveback and cause other problems without diagnosing the failed node. If it did a failover there is probably a good reason why it did so would strongly recommend having NGS take a look at the logs to be sure you don't have any failed loops, h/w, etc.

Re: takeover - not sure why?

kongfranon — Wed, 06 Oct 2010 16:12:27 GMT

Thanks,

out of curisoity when a node is taken over you cannot telnet into it? i wanted to take a look at the logs on that node and it would not let me connect at all, only the one that tookitover

Re: takeover - not sure why?

chriszurich — Wed, 06 Oct 2010 21:20:22 GMT

Once the secondary controller has taken over the failed controller you can only telnet/ssh to the secondary. You can however execute commands on the "taken over" controller by running partner from the console.

Re: takeover - not sure why?

aborzenkov — Thu, 07 Oct 2010 05:38:14 GMT

Additionally if node exports root volume using CIFS/NFS, it is always possible to access /etc/messages and other files even if it is taken over.

Re: takeover - not sure why?

matej — Thu, 07 Oct 2010 07:14:31 GMT

Have you done DataONTAP upgrade lattely? In latest version of DoT you should increase takeover detection time from 10 seconds to 15 seconds. Please take a look at opitons cf.takeover.detection.seconds.

And of course - pass the logs to NGS.

Matej

Re: takeover - not sure why?

watan — Thu, 07 Oct 2010 12:37:29 GMT

Unfortunately you cannot telnet into the node that has been taken over. Its essentially in either "waiting for giveback" mode or its completely down. If you have access to MYautosupport you should be able to take a look at all the logs avaialble for both nodes. Again , I would strongly recommend getting NGS involved if you haven't done so already. Good luck!

Re: takeover - not sure why?

kongfranon — Thu, 07 Oct 2010 12:58:00 GMT

Thanks everyone for the quick answers. I have a call open and waiting to find out what support says.