Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

Use the createpair command with the -sg option to create SRDF device pairs using storage groups.

symrdf -sg SgName -sid SID -rdfg GrpNum 
      -bypass 
      -noprompt
      -i Interval 
      -c Count
     	-v | -noecho | -force | -symforce | -star
      -hop2

createpair 
      -type <R1|R2> 
      -remote_sg SgName
      -invalidate R1|R2 | -establish | -restore [-rp] 
      -format | -establish
      -hop2_rdfg GrpNum]
      -rdf_mode sync | semi | acp_wp | acp_disk
      -remote 
      -exempt
      -nowd

Options

-sg SgName

A storage group for SRDF operations.

-rdfg GrpNum

The name of the SRDF group that the command works on.

When used with -sg createpair -hop2, identifies the SRDF group associated with the storage group.

-type [R1|R2]

Whether the devices are configured as the R1 side or the R2 side.

-remote_sg SgName

When used with -hop2_rdfg GrpNum, the remote storage group for the second-hop.

-invalidate [R1|R2]

Marks the source (R1) devices or the target (R2) devices to invalidate for a full copy when an SRDF pair is created.

-establish

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

-restore

Begins copying data to the source devices, synchronizing the dynamic SRDF pairs once the SRDF pairs are created.

-rp

Allows the operation even when one or more devices are tagged for RecoverPoint.

A non-concurrent R1 device can be tagged for RecoverPoint. A RecoverPoint tagged device can be used as an R1 device. A device tagged for RecoverPoint cannot be used as an R2 device (createpair) or swapped to become an R2 device (swap, half-swap).

-format

Clears all tracks on the R1 and R2 sides to ensure no data exists on either side, and makes the R1 read write to the host.

You can specify this option with -establish, -type, -rdf_mode, -exempt, and -g.

When used with -establish, the devices become read write on the SRDF link and are synchronized.

-hop2_rdfg GrpNum

The SRDF group number for the second-hop. Applicable only for createpair -hop2 for an SG.

-rdf_mode Mode

The SRDF mode of the pairs as one of the following:

• synchronous (sync),
• adaptive copy disk mode (acp_disk),
• adaptive copy write pending mode (acp_wp).
  NOTE:

  Adaptive copy write pending mode is not supported when the R1 mirror of the SRDF pair is on an array running HYPERMAX OS.

  Adaptive Copy Disk is the default mode unless overridden by the SYMAPI_DEFAULT_RDF_MODE options file setting. See Block createpair when R2 is larger than R1.

-remote

Requests a remote data copy. When the link is ready, data is copied to the SRDF mirror.

-nowd

Bypasses the check explained in Verify host cannot write to target devices with -nowd option.