How does the device bias work with the R2 device if the R1 array has a failure?

SRDF/Metro has been implemented with the bias setting. The R1 side of the pair is configured as the bias side.

How does the device bias work with the R2 device if the R1 array has a failure?
A . Device bias is unable to make the R2 device available to the host
B . Device bias performs a half-swap, and the R2 device becomes the new R1 device
C . R2 device automatically becomes the bias device
D . R2 device automatically becomes the active device

View Answer

Answer: D

Explanation:

In an SRDF/Metro configuration with bias setting, if there is a failure at the R1 array (which is configured as the bias side), the R2 device automatically becomes the active device. This means that even if there’s a failure on the R1 side, operations can continue on the R2 side without interruption, ensuring high availability.

https://infohub.delltechnologies.com/l/dell-emc-powermax-and-vmax-all-flash-srdf-metro-overview-and-best-practices-1/understanding-bias