Core server can be managed directly or using server manager. Here are some tips for managing disks
Server Manager is a management console in Windows Server that helps you provision and manage both local and remote Windows-based servers from your desktops, without requiring either physical access to servers, or the need to enable Remote Desktop protocol (RDP) connections to each server. Server Manager supports remote, multi-server management.
To enable your local server to be managed by Server Manager running on a remote server, run the Windows PowerShell cmdlet Configure-SMRemoting.exe –Enable.