This type of problem is caused by a disk partition exception, and we can try to format it using the DiskPart command. First use a USB flash drive or CD-ROM boot system into the following interface, Click on the bottom left "repair Computer", enter the computer Repair mode, and select "Command prompt."
1. In the Command Prompt window, type: diskpart
2. At the DiskPart prompt, type: list disk Displays all current disk information. ( usually disk 0)
3. At the DiskPart prompt, type: select disk 0 select disk 0
4. At the DiskPart prompt, type: clean Clear Current Disk information
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Installing a Windows Server R2 disk partition cannot be formatted