I'm creating one HDInsight cluster in resource group1, but when choosing the storage, it turns out that I can use a storage account in another resource group.
But as far as I know, all resources (including HDInsight) should be bound to only one resource group.
So how is that the HDInight cluster could reach a storage account that is not the same as itself?
This is a false statement - But as far as I know, all resources (including HDInsight) should be bound to only one resource group.
When you using Azure HDInsight - You can use Storage account which can be different Resource Group.
Note: The Azure HDInsight cluster is in the same location as the default storage.