Question about bus resets and quorum disk

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From: Robert Stankey (robert.stankey_at_lsil.com)
Date: 04/27/04 

Date: Tue, 27 Apr 2004 13:46:32 -0500

I have two Windows 2003 Enterprise Server hosts where I'm running a script
that alternately reboots each host to make sure all of the resources
failover correctly. The script ensures that at least one of the hosts is
running before performing the next reboot operation.

During the failover I see occasional bus reset messages which, as I
understand it, is normal although I don't see them everytime. I'm trying
to understand exactly why.

Presumably rebooting a host via a script is a "graceful" action - ie. the
system has time to properly shutdown all services including MSCS. Given
this I would assume the quorum-owning host would have an opportunity to
move the quorum resources to the alternate node, thereby preventing the
alternate node from having to issue resets unless the release of
reservations to those disk resources failed.

Lets take a case where both nodes are active but the network connection
fails between them. As I understand it one of the nodes will initiate a
bus reset then wait for 10 seconds. This allows enough time for the
alternate node to acquire reservations for all of the disk resources.
Since the alternate node is active it will get all of the resources. Is
this correct? If so, which node decides to issue the bus reset? Is it the
quorum-owning node?

Thanks,
Bob

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