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External Identity issue on VMAX
Hello All,
We have a situation, i am hoping someone can help us with this.
We have 1 VMAX and 1 Powermax System. Our previous storage team did NDM between these 2 systems. Now for a lot of LUNS on Powermax, i see external identity (WWPN) of the LUN resembles the vmax. We came to know that this is common for the systems which are involved in NDM.
Now, we are going to decommission the VMAX system. I would like to know if we power off the VMAX whatever LUNS on PMAX which have identity as VMAX gets impacted or not.
I could unmap the LUNS on PMAX and reset the identity, but that will need downtime. I see this issue on thousands on LUNs and frankly we won't be able to get approval for downtime on all the servers. So, if someone came across this or have any kind of information, please let me know.
Please let me know if you have any questions.
P.S we do not have support for this VMAX system, so couldnt get help from EMC support.
DELL-Josh Cr
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October 4th, 2023 19:17
Hi,
Thank you for your question.
Was the move identity feature used when you did the NDM? https://dell.to/3Q4MI5M
Let us know if you have any additional questions.
Thanks,
Josh #Iwork4Dell
Prasad0065
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October 4th, 2023 20:12
@DELL-Josh Cr Thanks for responding. Actually, I am not sure. We have taken up this project few months back. NDM is done couple of years back, so we are not sure how it was done. Is there a way we can check that ?
Prasad0065
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October 25th, 2023 21:33
@DELL-Josh Cr Thanks for your response. We do not want to change the LUN ID or the WWPN identity.
As you mentioned that the volume will have a spoofed WWN, if we decommission\Shut down the source storage box, will it impact the LUNs coming from new storage box which have a spoofed WWN.
Prasad0065
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November 2nd, 2023 19:00
We did not attempt to decommission the old storage. We are worried if we remove the plugs on the old storage box, the LUNS from the new storage box will become inaccessible.
These external WWPNS are just the identities right. All the LUNS are actually from new system and the data is also storage in the LUNS from new system. So, do you really think the LUNS will be impacted if we remove the old system. We have removed all the masking views from old system. It is just having older LUNS in it.