We have a 2 x F820 clustered. We have experienced 2 hardware failures on one of our F820 is the space of 1 week. During these hardware failures, the filer didnt manage to do a failover automatically. We had to do a force take over. All configs are identical as per cluster options. The only thing I see is that time clock is out of sync, which was caused during an upgrade in DataOnTap. (Known Bug) What I would like to know is if this is normal behaivour with clusters and hardware failure, and can the time sync be the problem that is stopping the live Netapp from automatically taking over the failed Netapp.

Kevin

-----Original Message----- From: Coatney, Sue [mailto:Sue.Coatney@netapp.com] Sent: 21 February 2002 02:25 To: 'Daniel Jung'; toasters@mathworks.com Subject: RE: Upgrading firmware

Also, I've heard that you "can" upgrade disk firmware while having both filers ON-LINE and clustered. Is this true?

Yes. With DOT 6.0.3 and 6.1.2 and later. However, the drives are unresponsive while firmware is being downloaded, which will impact client access, so caution is needed.

For prior releases, you should really follow the directions of having one of the filers halted, as documented on the NOW site.

Sue =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Sue Coatney Network Appliance Clustering Team

Hi Fellow toasters,

I need to upgrade OnTap on the couple of F840s that is clustered. According to the NOW site, it is recommended that I should bring down both filers and do disk firmware upgrade on one while the other filer is halted. Is this really necessary? What I planned to do was to upgrade OnTap on one of the filers (while clustering is disabled) first before I bring down the second one. Is this more dangerous than what NOW site recommends?

Also, I've heard that you "can" upgrade disk firmware while having both filers ON-LINE and clustered. Is this true?

Thanks

Daniel Jung

System Administrator GMO inc

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