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3-node active/passive/passive multi site cluster

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Configuration:

Primary Data Center:

2 of 3 nodes - One is active and one is passive.

HA/DR Data Center:

The 3rd node is located here in passive mode.

Configured as above, if both nodes go down in the Primary Data Center fail over to the 3rd node in the HA/DR site would be a manual fail over due to a less than 50% quorum. Would it be possible to create 2 witness disks in a 3rd physical location? If I was able to configure 2 witness disks the fail over to the HA/DR site would occur automatically if the Primary Data Center is down.


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