Dynamic disk problem. Win 7

Discussion in 'Windows 7 Help and Support' started by ken63, Sep 15, 2009.

  1. ken63

    ken63 New Member

    Sep 15, 2009
    Likes Received:
    I recently installed Windows 7 with 2 x 1 TB hard drives so that I could mirror them with raid 1. When I checked disk management I saw that both HD's were formatted as basic disks but need to be dynamic disks to mirror. I converted both the primary and secondary HD's to dynamic through DOS Command Promt. (couldn't use the commands in Win 7. Either "greyed out" or non existant.) Everything was fine until I rebooted and nothing happened. I went back into dos to make the partition active and on reboot it said no operating system found. I tried his on both HD's. I see that all the info is still on the disks and I can see that they are mirrored but I can't get it to boot. I'd appreciate any suggestions. Thanks.:confused:
  2. SIW2

    SIW2 New Member

    Jun 10, 2009
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    To reactivate a dynamic disk by using a command line
    1. Open a command prompt and type diskpart.
    2. At the DISKPART prompt, type list disk. Make note of the disk number of the missing or offline disk that you want to bring online. Missing disks are numbered M0, M1, M2, and so on, and offline disks are numbered 0, 1, 2, and so on.
    3. At the DISKPART prompt, type select disk <disknumber>.
    4. At the DISKPART prompt, type online.

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