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I screwed up my hard drive using Disk Management in Windows 7 because i accidentally converted my entire hard drive basic to dynamic. I tried tweaking it around to regain the Basic state, but failed.

Now I can't even boot Windows. Is there a way for me to delete the entire dynamic disk, convert to basic, and start over with the Windows installation in DOS mode?

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Start over in "DOS mode"? – Bobson Mar 11 '12 at 20:02
up vote 1 down vote accepted

You want DISKPART, which will allow you to delete dynamic disks. You can access it either through WinPE or the recovery command prompt from a bootable Windows CD.

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See this Microsoft article for a step-by-step description of the process:

Change a dynamic disk back to a basic disk.

If Windows won't boot, you will need to boot from CD into the console.

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DISKPART

Run it from the recovery command prompt.

Once there: diskpart

Use ? for help.

I find the clean command is best for removing unwanted (DYNAMIC) drives.

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you can use a regualuar windows cd to delete the partitions and then you recreate your partitions. so you can find the instructions using a windows xp cd here

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i've tried this method, but the delete button is grayed out during installation... – user22105 Dec 20 '09 at 5:56

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