Home > Workload Solutions > SQL Server > White Papers > Deploying Dell EMC SRDF/Metro Smart DR with Microsoft SQL Server for Physical and Virtual Environments > Step 6: Option 2 (recommended): setup protection using “Witness”
Once either Physical, or vWitness, or both types of protection are added, you can protect the storage groups with SRDF/Metro using a Witness. Instead of choosing Protected By - Bias in Step 6: Option 1 (not recommended): set up protection using “Bias”, select Witness protection. SRDF/Metro will use Physical and/or Virtual Witness as defined.
This figure shows verification that the Virtual witness is in use.
Figure 11. Virtual Witness in use
The pair State of the devices will now show Active/Active to indicate that the storage groups are using Witness rules protection.
Figure 12. Pair State of devices in Witness rules protection