We use SRDF/A in our environment. I want to add more RAs to existing RDF groups. Do I need to suspend RDF relationship before modifying a RDF group ?.
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This change can be done online without suspending the RDF pairs. The RDFG MUST be dynamic and the director you are adding should be online and should have a physical connection to a director in the remote array.
symcli command : symrdf modifygrp -rdfg xx -add -dir xx -remote_dir xx
Hope that helps
Reassigning directors for SRDF dynamic groups requires that you understand the network fabric topology when choosing director endpoints. The modify command cannot be used to modify existing static groups. You must specify the group
label or group number.
The following example modifies a dynamic group (dyngrp4) to remove a supporting director 13a assigned from the group on the local Symmetrix array 6180:
symrdf modifygrp -sid 6180 -label dyngrp4 -remove -dir 13a
The following example modifies a dynamic group (dyngrp4) to add (assign) a supporting director 12a to the group on the local Symmetrix 6180:
symrdf modifygrp -sid 6180 -label dyngrp4 -add -dir 12a
When adding a director to a dynamic group, the specified director for the local Symmetrix array must be online and a physical link to one online director in the remote Symmetrix array must exist.
Should I suspend the SRDF/A RDF group before modifying the RDF group ? Can I add a new RA port to the existing RDF group when it’s in consistent state ?