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ExpressCluster X 2.0 for Windows Reference Guide - Nec

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Section II Resource details<br />

Disk resource 1<br />

Application resource 1<br />

Floating IP<br />

resource 1<br />

Server1 Server2<br />

Monitor resource<br />

Disk TUR monitor<br />

resource 1<br />

Failover Group A<br />

Shared<br />

disk<br />

Server1 Server2<br />

Monitor resource<br />

Disk TUR monitor<br />

resource 1<br />

Monitor error<br />

Shared<br />

disk<br />

Monitor resource<br />

Disk TUR monitor<br />

resource 1<br />

Monitor resource<br />

Disk TUR monitor<br />

resource 1<br />

Monitor resources<br />

Failover of the failover<br />

group A due to the error<br />

detected by the TUR<br />

monitor resource 1 starts in<br />

server1.<br />

“Failover threshold” of the<br />

monitor resource is failover<br />

count on a server basis.<br />

The first failover in server1.<br />

server1:<br />

Disk TUR monitor resource<br />

1:<br />

Failover count 1<br />

Disk resource 1:<br />

Failover count Zero<br />

server2:<br />

Disk TUR monitor resource<br />

1:<br />

Failover count Zero<br />

Disk resource 1:<br />

Failover count Zero<br />

Activating the disk resource<br />

1 due to the failover fails in<br />

server2.<br />

FailoverGroup A Activation<br />

Disk resource 1<br />

Application resource 1<br />

failure<br />

Floating IP server1:<br />

resource 1 Disk TUR monitor resource 1:<br />

Monitor<br />

error<br />

Failover count<br />

Disk resource 1:<br />

Failover count<br />

Once<br />

Zero<br />

server2:<br />

Disk TUR monitor resource 1:<br />

Failover count Zero<br />

Disk resource 1:<br />

Failover count Zero<br />

An error can be detected in deactivation of the disk resource depending on the location of the<br />

disk device failure.<br />

575

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