Upgrade Hypver 2012R to 2016R

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I have 2 X DELL R640 Hosts running Windows Hyperv 2012R2

They both share a ISCSI Storage (DELL 5020 SAN)


HOST B has had all VM's evicted and been upgraded (Fresh Install) to Server 2016.  All roles installed. Network configured.  iSCSI Setup.


Current status is: the disks show as RAW - when bringing online they came up as RAW and with a drive letter.


HyperV is not able to see the disk.


According to the steps, i should now be selecting Copy Cluster Roles, but i am afraid that if i did this and storage not accessible from the new Host, what will the impact be.


Or as part of the Copy do

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