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CUCM - DRS One-Step Restore vs Cluster Restore

Hi.  Looking at the documentation regarding DRS Restore for CUCM  11.5.

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/11_5_1/AdmiDisaster Recovery Disaster Recovery System,DRS,Backup,RestoreSystem,DRS,Backup,Restoren/cucm_b_administration-guide-1151/cucm_b_administration-guide-1151_chapter_01011.html#CUC...

 

I'm struggling to understand the difference between the "Restore Cluster in One Step After Publisher Rebuilds" and the "Restore Entire Cluster" process and the benefits of one over the other and scenarios they would be used.  

 

My understanding is both methods require the Pub and Subs to be pre-built at the relevant version with IP address etc configured, and both methods involving selecting all nodes to be restored.  The One Step appears to check the Publisher is Cluster aware prior to selecting nodes to restore, whereas the entire cluster goes straight into selecting nodes - is this just an advanced check you can undertake before restoring the cluster but the result is the same?

 

Can anyone expand?

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Anyone able to advise?

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