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http://www.experts-exchange.com/Storage/Q_20724595.htmlUse the following procedure to use the Diskpart.exe utility to clean the disk.
Note: If you use Windows XP or Windows Server 2003, the Diskpart.exe utility is already installed. If you are using Windows 2000, install the Diskpart.exe utility for Windows 2000. To download the Diskpart.exe utility, visit the following Microsoft Web site:
www.microsoft.com/windows2000/techinfo/reskit/tools/From a command prompt, type diskpart, and then press ENTER.
Type select disk number (where disk number is the physical disk number that you want to clean), and then press ENTER.
Type clean, and then press ENTER.
Type exit, and then press ENTER.
The disk becomes a basic disk that contains unallocated space. You must allow Disk Management to write a new disk signature before you can use this disk.
MORE INFORMATION
For additional information about this issue, click the article numbers below to view the articles in the Microsoft Knowledge Base:
236086 System/Boot Disk Listed as Dynamic Unreadable in Disk Management
280724 Stop 0x0000007B Generated Converting Basic Disk to Dynamic