Hello
Thank you for your question and reaching out.
I can understand you are having query related to Disk in AD server.
I would suggest you to run first chkdsk /f /r and check the result of the command if there is no bad sectors or errors and also check event logs related to System-> Disk
If Disk result is good in checkdisk and event viewer then you can clone it.
and If you have full image backup then I will suggest you to take latest backup and turn off that DC and restore it on new Disk with same IP and MAC address to avoid any AD replication issue.
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