Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

Syntax

You can transition an SRDF/A device or device group to synchronous mode without losing consistency. Consistency on the R2 side is preserved.

The amount of time to complete the transition varies depending on whether the mode is legacy or multi-cycle:

• In legacy mode, the switch from asynchronous to synchronous requires two SRDF/A cycle switches to complete.
• In multi-cycle mode, the amount of time required includes the time to commit the current capture cycle and all cycles currently in the transmit queue to the R2 side.

Use the -consistent set mode sync operation to set the mode to synchronous for a device group, storage group, or devices in a device file:

symrdf -g DgName -consistent set mode sync
symrdf -sg SgName -consistent set mode sync
symrdf -file Filename -consistent set mode sync

Examples

To switch modes from asynchronous to synchronous and maintain R2 data consistency in group prod:

symrdf -g prod -consistent set mode sync

To switch modes from asynchronous to synchronous and maintain R2 data consistency for devices listed in device file devfile1:

symrdf -f devfile1 -consistent set mode sync