RE: Question about bus resets and quorum disk

From: Greg Page (gpage_at_nospam.microsoft.com)
Date: 04/28/04 

Date: Wed, 28 Apr 2004 21:16:22 GMT

if the network connection fails, both nodes will iniate bus resets. they
are normal during disk online/offline and regroup (what happens during a
communication loss arbitration for disk) process.

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>From: Robert Stankey <robert.stankey@lsil.com>
>Subject: Question about bus resets and quorum disk
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>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
>