InstantForum.NET v2.9.0SQLServerCentralhttp://www.sqlservercentral.com/Forums/notifications@sqlservercentral.comWed, 19 Jun 2013 18:41:13 GMT20http://www.sqlservercentral.com/Forums/Topic1379173-1549-1.aspxyou're welcome ;-)Wed, 31 Oct 2012 08:37:18 GMTPerry Whittlehttp://www.sqlservercentral.com/Forums/Topic1379173-1549-1.aspx[quote][b]Perry Whittle (10/31/2012)[/b][hr]check your event logs for more info, there'll be some errors there that will be relative.[/quote]Thanks for your helpWed, 31 Oct 2012 04:57:55 GMTSQLSACThttp://www.sqlservercentral.com/Forums/Topic1379173-1549-1.aspxcheck your event logs for more info, there'll be some errors there that will be relative.Wed, 31 Oct 2012 04:52:36 GMTPerry Whittlehttp://www.sqlservercentral.com/Forums/Topic1379173-1549-1.aspx[quote][b]Perry Whittle (10/31/2012)[/b][hr][quote][b]SQLSACT (10/31/2012)[/b][hr][quote][b]Perry Whittle (10/31/2012)[/b][hr][quote][b]SQLSACT (10/31/2012)[/b][hr]Hi GuysPlease help me understand something the Cluster Quorum and specifically Node and Disk MajorityI understand that if you have an even amount on nodes on your cluster, it's recommended to implement Node and Disk Majority. To avoid the split-brain effect and other undesirables.My question is, if your disk that you have specified as your Quorum disk goes down, does it take the entire cluster down?Thanks[/quote]Not necessarily, it depends on what other votes are around at the time of failure. More on the new quorum models can be found at [url=http://technet.microsoft.com/en-us/library/cc731739.aspx][u][b]this link[/b][/u][/url].Also, the link above states[quote][b]Technet online[/b][hr]Can sustain failures of half the nodes (rounding up) if the disk witness remains online. For example, a six node cluster in which the disk witness is online could sustain three node failures.[color="RED"]Can sustain failures of half the nodes (rounding up) minus one if the disk witness goes offline or fails. For example, a six node cluster with a failed disk witness could sustain two (3-1=2) node failures.[/color][/quote][/quote]In my case, I have a 2 node 2008 cluster with Node and Disk MajorityI took down the Quorum drive and the entire cluster went downNormal?[/quote]No, as 2 out of 3 votes would have still been available. Having said that, in your config, removal of the disk witness would not sustain any further node failures.Re run the cluster validation report and check for errors, also check the event and cluster logs for issues too[/quote]ThanksWhat I forgot to mention is that the Cluster went down and then came back up again after a few seconds. The Quorum drive also came upThanksWed, 31 Oct 2012 04:35:25 GMTSQLSACThttp://www.sqlservercentral.com/Forums/Topic1379173-1549-1.aspx[quote][b]SQLSACT (10/31/2012)[/b][hr][quote][b]Perry Whittle (10/31/2012)[/b][hr][quote][b]SQLSACT (10/31/2012)[/b][hr]Hi GuysPlease help me understand something the Cluster Quorum and specifically Node and Disk MajorityI understand that if you have an even amount on nodes on your cluster, it's recommended to implement Node and Disk Majority. To avoid the split-brain effect and other undesirables.My question is, if your disk that you have specified as your Quorum disk goes down, does it take the entire cluster down?Thanks[/quote]Not necessarily, it depends on what other votes are around at the time of failure. More on the new quorum models can be found at [url=http://technet.microsoft.com/en-us/library/cc731739.aspx][u][b]this link[/b][/u][/url].Also, the link above states[quote][b]Technet online[/b][hr]Can sustain failures of half the nodes (rounding up) if the disk witness remains online. For example, a six node cluster in which the disk witness is online could sustain three node failures.[color="RED"]Can sustain failures of half the nodes (rounding up) minus one if the disk witness goes offline or fails. For example, a six node cluster with a failed disk witness could sustain two (3-1=2) node failures.[/color][/quote][/quote]ThanksIn my case, I have a 2 node 2008 cluster with Node and Disk MajorityI took down the Quorum drive and the entire cluster went downNormal?[/quote]No, as 2 out of 3 votes would have still been available. Having said that, in your config, removal of the disk witness would not sustain any further node failures.Re run the cluster validation report and check for errors, also check the event and cluster logs for issues tooWed, 31 Oct 2012 04:09:06 GMTPerry Whittlehttp://www.sqlservercentral.com/Forums/Topic1379173-1549-1.aspx[quote][b]Perry Whittle (10/31/2012)[/b][hr][quote][b]SQLSACT (10/31/2012)[/b][hr]Hi GuysPlease help me understand something the Cluster Quorum and specifically Node and Disk MajorityI understand that if you have an even amount on nodes on your cluster, it's recommended to implement Node and Disk Majority. To avoid the split-brain effect and other undesirables.My question is, if your disk that you have specified as your Quorum disk goes down, does it take the entire cluster down?Thanks[/quote]Not necessarily, it depends on what other votes are around at the time of failure. More on the new quorum models can be found at [url=http://technet.microsoft.com/en-us/library/cc731739.aspx][u][b]this link[/b][/u][/url].Also, the link above states[quote][b]Technet online[/b][hr]Can sustain failures of half the nodes (rounding up) if the disk witness remains online. For example, a six node cluster in which the disk witness is online could sustain three node failures.[color="RED"]Can sustain failures of half the nodes (rounding up) minus one if the disk witness goes offline or fails. For example, a six node cluster with a failed disk witness could sustain two (3-1=2) node failures.[/color][/quote][/quote]ThanksIn my case, I have a 2 node 2008 cluster with Node and Disk MajorityI took down the Quorum drive and the entire cluster went downNormal?Wed, 31 Oct 2012 03:51:45 GMTSQLSACThttp://www.sqlservercentral.com/Forums/Topic1379173-1549-1.aspx[quote][b]SQLSACT (10/31/2012)[/b][hr]Hi GuysPlease help me understand something the Cluster Quorum and specifically Node and Disk MajorityI understand that if you have an even amount on nodes on your cluster, it's recommended to implement Node and Disk Majority. To avoid the split-brain effect and other undesirables.My question is, if your disk that you have specified as your Quorum disk goes down, does it take the entire cluster down?Thanks[/quote]Not necessarily, it depends on what other votes are around at the time of failure. More on the new quorum models can be found at [url=http://technet.microsoft.com/en-us/library/cc731739.aspx][u][b]this link[/b][/u][/url].Also, the link above states[quote][b]Technet online[/b][hr]Can sustain failures of half the nodes (rounding up) if the disk witness remains online. For example, a six node cluster in which the disk witness is online could sustain three node failures.[color="RED"]Can sustain failures of half the nodes (rounding up) minus one if the disk witness goes offline or fails. For example, a six node cluster with a failed disk witness could sustain two (3-1=2) node failures.[/color][/quote]Wed, 31 Oct 2012 02:47:14 GMTPerry Whittlehttp://www.sqlservercentral.com/Forums/Topic1379173-1549-1.aspxHi GuysPlease help me understand something the Cluster Quorum and specifically Node and Disk MajorityI understand that if you have an even amount on nodes on your cluster, it's recommended to implement Node and Disk Majority. To avoid the split-brain effect and other undesirables.My question is, if your disk that you have specified as your Quorum disk goes down, does it take the entire cluster down?ThanksWed, 31 Oct 2012 01:17:59 GMTSQLSACT