Dynamic RDF Groups on SRDF VMAX 5874 and above Enguinity.

 

 

Contents

Dynamic RDF Groups on SRDF VMAX 5874  and above Enguinity. 1

To display dynamic SRDF devices, use the symdev list command with the. 2

Creating a device file. 2

Device type combinations for creating SRDF pairs. 2

This command creates RA group 4 on each side of the Array. 3

Establish the SRDf Pair. 3

Establish dynamic SRDF Pair with the Establish command. 4

To display all the RA Group Details onthe Array we can issue the below command and list all the RA groups. 4

Modify the RA dynamic Groups. This Feature can be used for Adding Director or Removing the Director from the dynamic RA Groups. 4

Removing dynamic RDF Groups- Before Removing the RDF Groups we need to Remove the Pair Relation or Delete the SRDF Pairs. 4

Dynamically changing Link Domino and Automatic Recovery modes. 5

Specifying an RDF group link limbo. 5

Creating dynamic SRDF pairs for a restore. 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To display dynamic SRDF devices, use the symdev list command with the

-dynamic option as follows:

 

                #symdev list -dynamic [-R1] [-R2] [R21]

 

 

Creating a device file

 

                In the following example, local devices are listed in the first column and remote

devices are listed in the second column:

 

                                010A 00B7

                                010F 00BF

                                0106 00C5

 

Device type combinations for creating SRDF pairs

               

Device 1	Device 2
Standard	Standard
Thin	Thin
Standard	Diskless
Thin	Diskless
Thin	Standard

 

 

 

 

This command creates RA group 4 on each side of the Array

 

                #symrdf addgrp -label dyngrp4 -rdfg 4 -sid 6180 -dir 12a -remote_rdfg 4 -remote_sid 6240 -remote_dir 13a

 

Once the RA Group is create we can create the RA Pairs dynamically. The File dynpairsfile containes the Device Pair information which are R! R2 Capable Devices.

 

                # symrdf createpair -file dynpairsfile -sid 6180 -rdfg 4 -type r1 -invalidate r2

                symrdf createpair -file devicefile -sid 55 -rdfg 1 -type R1 -invalidate r2 -nowd

 

                The validation exempt check (-nowd) option allows you to bypass the validation check to ensure that the target of                 operation is write disabled to its host.

 

 

 

Establish the SRDf Pair

 

                                #symrdf -file devicefile establish -sid 55 -rdfg 1

                                #symrdf -file devicefile query -sid 55 -rdfg 1

 

 

Establish dynamic SRDF Pair with the Establish command

 

                #symrdf createpair -file devicefile -sid 55 -rdfg 1 -type R1 -establish

 

 

 

To display all the RA Group Details onthe Array we can issue the below command and list all the RA groups.

 

                # symcfg list -ra all

 

 

Modify the RA dynamic Groups. This Feature can be used for Adding Director or Removing the Director from the dynamic RA Groups

 

 

                Remov-                #symrdf modifygrp -label dyngrp4 -sid 6180 -remove -dir 13a

 

                Add-      #symrdf modifygrp -label dyngrp4 -sid 6180 -add -dir 8a

 

Removing dynamic RDF Groups- Before Removing the RDF Groups we need to Remove the Pair Relation or Delete the SRDF Pairs

 

                #symrdf deletepair -file dynpairsfile -sid 80 -rdfg 4

                #symrdf removegrp -sid 80 -label dyngrp4

 

 

Dynamically changing Link Domino and Automatic Recovery modes.

 This Option will make sure that the Devices R1 and R2 will be in Ready state when the Link comes back online.

 

                #symrdf -sid 6180 -rdfg 4 set auto_link_recovery -both sides

 

Specifying an RDF group link limbo

 

This advanced user feature allows you to set a specific

length of time for Enginuity to wait when a down link is detected before updating the link status. If the link status is still not ready after the link limbo time expires, devices are marked not ready to the link. The link limbo value can be set from 0 to 120 seconds. The default value is 10 seconds.

 

For example, to set the link limbo value to 1 minute for both sides of RDF group 4 on

 

Symmetrix array 6180, enter:

 

                #symrdf -sid 6180 -rdfg 4 set link_limbo 60 -both sides

 

 

 

 

Creating dynamic SRDF pairs for a restore

 

You can perform a restore operation to copy data back to the R1 source devices by

including the -restore option in the createpair command line as follows:

 

                #symrdf createpair -file devicefile -sid 55 -rdfg 1 -type R1 -restore

 

Creating dynamic SRDF pairs for a restore

 

 

You can perform a restore operation to copy data back to the R1 source devices by

including the -restore option in the createpair command line as follows:

 

#symrdf createpair -file devicefile -sid 55 -rdfg 1 -type R1 -restore

 

Deleting dynamic SRDF pairs

 

# symrdf -file devicefile suspend -sid 55 -rdfg 2

# symrdf deletepair -file devicefile -sid 55 -rdfg 2

 

Deleting one-half of an SRDF pair

This option can be used when we want to Delete the SRDF pair and keep the R@ Device as RDF r2 and R1 to be standard device.

 

Grouping dynamic pairs with a device file

 

This feature will add the devices in the device pair file to the device group when we creare the SRDF pair.

 

# symrdf createpair -file devicefile -sid 55 -rdfg 2 -type rdf1 -invalidate r2 -g NewGrp