Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

symrdf failover -restore swaps the R1 and R2 and restores the invalid tracks on the new R2 side (formerly R1) to the new R1 side (formerly R2).

You can execute this command for device groups, composite groups and device files. The devices in this failover can be using synchronous or asynchronous links.

Syntax

symrdf -g [-g DgName |-cg CgName |-sg SgName |-f FileName]
   [-bypass]
   [-noprompt]
   [-i Interval]
   [-c Count]
   [-hop2 | -bcv [-hop2] | -all | -rbcv | -brbcv]
   [-rdfg GrpNum]
   [-star]
   [-sid SID]

failover [- immediate | -establish | -restore [-remote]]

Options

-immediate

Deactivates the SRDF/A session immediately, without waiting for the two cycle switches to complete before starting the failover -restore operation.

-establish

Begins copying data to invalidated targets, synchronizing the dynamic SRDF pairs once the SRDF pairs are created.

-restore

Causes the dynamic SRDF device pairs to swap personality and start an incremental restore.

-remote

Requests a remote data copy flag with failback, failover, restore, update, and resume. When the concurrent link is ready, data is copied to the concurrent SRDF mirror. These operations require the remote data copy option, or the concurrent link to be suspended.

Restrictions

• If an SRDF group being failed over is operating in asynchronous mode, then all devices in the group must be failed over in the same operation.
• The R1 and the R2 devices in the failover must be dynamic SRDF devices.
• The R2 device cannot be larger than its R1 device.
• The SRDF swap cannot result in a cascaded R21<-->R21 device pair.
• Not supported by any device group operations with more than one SRDF group.
• Cannot execute this command on both mirrors of a concurrent R2 device (composite group operation). This swap would convert the concurrent R2 into a concurrent R1, with a restore on both mirrors of that concurrent R1.