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Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

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Device bias

Device bias is the only bias method. When making device pairs R/W on the SRDF link, use the -use_bias option to indicate that the Device bias method should be used for the device pairs. The bias side is the R1 side. However, if there is a failure on the array that contains the bias side, the host loses device access.
NOTE:The Device bias method provides no way to make the R2 device available to the host.
To change the bias side of a device group, composite group, storage group, or devices from one side to the other, use the set bias R1 | R2 option.
NOTE:On arrays running PowerMaxOS 5978, the set bias operation is only allowed if the devices in the SRDF/Metro session are operating with Device bias and are in the ActiveBias RDF pair state.

The ActiveBias pair state indicates that devices operating with Device bias are ready to provide high availability.

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