# Supported DR Scenarios

#### Production Site Is Faulty

- Description

  The production site has a fault. Services at the production site are affected and cannot be restored using the failover function.

  Figure 1 Production site being faulty

- Solution

  You can use the DR drill function to create DR drill servers at the DR site to resume the services.

  For more information about the DR drill function, see Performing a DR Drill.

#### DR Site Is Faulty

- Description

  The DR site has a fault. Services at the production site are not affected, but the planned failover cannot be performed.

  Figure 2 DR site being faulty
- Solution

  Contact the customer service to obtain technical support.

#### Replication Link Is Faulty

- Description

  The replication link between the production site and DR site becomes faulty. Services at the production site are not affected, but the planned failover cannot be performed.

  Figure 3 Replication link being faulty
- Solution

  You do not need to perform any operations. The DR protection will automatically restore once the replication link fault is rectified.

#### Storage Resource at the Production Site Is Faulty

- Description

  Services at the production site are affected because the storage resource at the production site has a fault.

  Figure 4 Storage resource at the production site is faulty
- Solution

  Use the failover function to start resources such as servers and disks at the DR site to resume the services.

  For more information about the failover function, see Performing a Failover.

#### Storage Resource at the DR Site Is Faulty

- Description

  The storage resource at the DR site has a fault. Services at the production site are not affected, but the planned failover or failover cannot be performed.

  Figure 5 Storage resource at the DR site being faulty
- Solution

  Contact the customer service to obtain technical support.

Parent topic: Service Overview