Your system has a Home Region, which is the data region that it was initially provisioned at. This will be referred to as the System Home Region. When cross regional disaster recovery is enabled for your system it will have a designated disaster recovery (DR) region. The disaster recovery region is the data region that your system will be switched to in case your home region is no longer available. This will be referred to as the System Disaster Recovery Region.

Your Oracle Cloud Infrastructure (where your Object Storage resides) has also a home region, that will be referred to as the Object Storage Home Region. If your system has a designed disaster recovery region, it will make sense for your object storage to have a designated disaster recovery region as well, which will be referred to as the Object Storage Disaster Recovery Region.

In most cases the System Home Region will be the same as the Object Storage Home Region but it could be different if it was chosen to be different. The same is true for the System Disaster Recovery Region and the Object Storage Disaster Recovery Region. Selecting an Object Storage Disaster Recovery Region will be covered in the next section.