How do I 'remove' an SRDF Group, link and GBCVs?

Question

I know how to create a new SRDF link from source to target array, but I don't know how to remove a link that we don't need anymore. We use SRDF/A. I guess that it's somehting like this:

# symrdf -g rdfg54 split

# symrdf -g rdfg54 deletepair

# symrdf -g rdfg54 removegrp

I also have Gold BCVs (GBCVs). I want them to "go away" as well. So I would need some commands like this, right, and I probably want to do them first:

# symmir -g rdfg54 split -rdf

# symmir -g rdfg54 cancel

Not only do I want to remove the group, but I want all of the R1s, R2s and GBCVs to be available for "re-use". I want to break all the "interralationships" between all of the Devices.

Then I want to "destroy" the RDF DGs, which I know how to do.

How do I do that? What commands do it use? Do I have to remove SRDF/A from "Consistent" state?

Stuart

seancummins · Accepted Answer

Stuart,

I'm guessing you have tolerance mode off (SRDF/A session consistency) for this RDFG -- try disabling session consistency with "symrdf -g disable", and then issue the deletepair again. If that doesn't work, try setting the mode to adaptive copy before the deletepair. You can do this with "symrdf -g set mode acp_disk".

Thanks,

- Sean

seancummins · Answer

Stuart,

You've pretty much got it.

You'll want to suspend the rdf group instead of splitting (symrdf -g rdfg54 suspend), but your deletepair looks good. Suspending the devices in the DG will take the devices out of a "Consistent" state. For removing the dynamic group, use "symrdf -sid -label ".

You can get a list of your RDFG labels with "symcfg -sid -rdfg all list".

Your TimeFinder remote BCV commands should work, assuming you're using TF/Mirror on DMX or you're using Clone Emulation (symmir) on VMAX. And yes, you'll want to remove the remote BCVs before removing the SRDF relationships -- otherwise you'll need to do the BCV work from a management host on the remote Symmetrix.

Hope that helps,

- Sean

StuartA58 · Answer

Sean: I did the suspend as you suggested and then I went to do the 'deletepair' and the command told me that:   'The device doesnt' have a valid RDF Consistency state for this operation'

StuartA58 · Answer

Here is the correct sequence of commands:

1. Remove GBCVs from RDFG:

# symmir -g rdfg54 cancel -rdf

2. Remove the R1-R2 relationships:

# symcfg -sid 1668 list -rdfg all

# symrdf -g rdfg54 query

# symrdf -g rdfg54 disable

# symrdf -g rdfg54 query

# symrdf -g rdfg54 suspend

# symrdf -g rdfg54 deletepair -force

# symrdf -g rdfg54 query

3. Remove the RDFG

# symrdf -sid 1668 removegrp -rdfg 54

# symcfg -sid 1668 list -rdfg all

4. Remove DG:

# symdg delete rdfg54 -force

VMAX

How do I "remove" an SRDF Group, link and GBCVs?

Was this post helpful?