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As of ECS 3.4, use version 2.0.6.x of the ECS Streamer driver due to ECS hardening of port 9101.
If you are already using version 2.0.6.x of the ECS Streamer driver and you upgrade to ECS 3.4 or later, changing the vault store partitions’ Safe Copy configuration from 2 to 1 is not necessary. The driver will automatically use the correct Geo-Replication checking mechanism.
Always use the latest GA version of the ECS Streamer driver.