Creating SRDF Groups

 

Topic

Managing SRDF

Selections

Select SRDF management tool: Managing SRDF using Symmetrix Management Console (SMC)

Select a task: Creating SRDF Groups

 

 

Contents

†††††††††††† Creating an SRDF group.. 3

 


 

 

        Creating an SRDF group

 

Overview

SRDF groups provide a collective data transfer path linking devices of two separate Symmetrix arrays. These communication and transfer paths are used to synchronize data between the R1 and R2 device pairs associated with the RDF group. At least one physical must exist between the two Symmetrix arrays within the fabric topology.

 

This procedure explains how to create an SRDF group.

 

This procedure is based on content from the SMC online help.

 

 

1.  

Before you begin

The maximum number of supported RDF groups differs by Enginuity version as shown below:

If the RDF interaction is between Enginuity 5874 and pre-5874 Enginuity, the maximum RDF group number of RDF is determined by the lower Enginuity level. The number of RDF groups per Symmetrix array and number of RDF groups defined on a director is determined solely by the Enginuity level running on the Symmetrix array where you are defining the group.

 

2.  

Create an SRDF group

Right-click the local Symmetrix ID and select Replication, SRDF Configuration, Create SRDF Group to open the Create SRDF Group dialog box. The left side of the dialog box is for the local array information; the right side of the dialog box is for the remote array information.

 

3.  

Enter required information

Select a Communication Protocol (Fibre Channel, FarPoint, or Gigabit Ethernet). The value you select will populate the Director list.

 

4.  

Enter an RDF Group Label

The maximum is 10 characters.

 

5.  

Enter an RDF Group Number

This number must be unique per Symmetrix array.

 

6.  

Select the local Director

Select the local Director through which this RDF group will communicate.

 

7.  

Select a Link Limbo Period

This is a length of time for the array to continue checking the local SRDF link status. (The range is 0-120 seconds, default is 10.)  If the link status is Not Ready after the link limbo time, the devices are made Not Ready to the link.

 

8.  

Optional

Select (enable) Link Domino for the local group.

With this feature enabled from either the local or remote side of the groupís RDF links, failure of the groupís last remaining link will make all source (R1) volumes in the group unavailable (not ready) to their host when an RD-side operation occurs. This ensures that the data on the source (R1) and target (R2) devices is always in sync.

 

9.  

Optional

Select (enable) Auto Link Recovery for the local group. With this feature enabled, once the link failure is corrected, devices that were ready to their host before the failure will automatically be restored to the ready state.

 

10.  

Select the Remote Symmetrix ID

Select the Remote Symmetrix ID from the pull-down menu

 

11.  

Enter the RDF Group Number.

Enter a Remote RDF Group Number

 

12.  

Select the Remote Director(s)

Select theRemote Director(s) through which this SRDF group will communicate.

 

13.  

Remote Link Limbo Period

Select a Remote Link Limbo Period.This is a length of time for the array to continue checking the remote SRDF link status. (The range is 0-120 seconds, default is 10). If the link status is Not Ready after the link limbo time, the devices are made Not Ready to the link.

 

14.  

Optional

Select (enable) Remote Link Domino for the remote group

With this feature enabled from either the local or remote side of the groupís RDF links, failure of the groupís last remaining link willmake all (not ready) to their host when an R1-side operation occurs. This ensures that the data on the source (R1) and target (R2) devices is always in sync.

 

15.  

Optional

Select (enable) Remote Auto Link Recovery for the remote group

With this feature enabled, once the link failure is corrected, devices that were ready to their host before the failure will automatically be restored to the ready state.

 

16.  

Click Apply

Click Apply to save the operation and keep the dialog box open for another operation.

 

17.  

Click OK

Click OK to close the dialog box.

 

 

7Table of Contents