Home > Storage > PowerMax and VMAX > Data Protection > Dell PowerMax and VMAX All Flash: SRDF/Metro Overview and Best Practices > Witness best practices for redundancy
The following are best practices for configurating a vWitness or Hardware-based witness:
Note: SRDF/Metro will always give priority to array-based witnesses first (code preference) followed by any vWitnesses configured in the environment. This is particularly important as an option for third site DR topologies where the DR array may be used as a hardware-based witness followed by one or more vWitnesses to meet the redundancy recommendations above.