How can I use DiskPart to create a mirrored disk?

John Savill

March 18, 2003

2 Min Read
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A. You can use the DiskPart utility from the Windows 2000 Server Resource Kit or the Win2K Professional Resource kit to either create a new mirrored disk or mirror an existing disk. (Be aware that Windows XP doesn't support mirrored disks.) To create a new mirrored disk, perform the following steps:

  1. Download and install the DiskPart utility from the Microsoft Web site.

  2. Go to Start, Run, then type

    cmd

    to start a command-line session.

  3. Type

    diskpart

    to start a DiskPart session.

  4. Type

    list disk

    to list the current disks. The list will look like

       Disk ### Status Size  Free    Dyn  Gpt   -------- ------ ----  ------- ---- ---    Disk 1   Online 28 GB 6621 MB *   Disk 2   Online 12 GB 12 GB   *   Disk 3   Online 29 GB 29 GB   *
  5. Type

    select disk 2

    to select disk 2 as the disk on which you want to create the mirror.

  6. Type

    create volume simple size=100

    to create a new volume.

  7. Type

    add disk 3

    to add disk 3 as the new disk that will become the mirror.

To add a mirrored disk to an existing disk, perform the following steps:

  1. Download and install the DiskPart utility from the Microsoft Web site.

  2. Go to Start, Run, then type

    cmd

    to start a command-line session.

  3. Type

    diskpart

    to start a DiskPart session.

  4. Type

    list disk

    to list the current disks. The list will look like

       Disk ### Status Size  Free    Dyn  Gpt   -------- ------ ----  ------- ---- ---    Disk 1   Online 28 GB 6621 MB *   Disk 2   Online 12 GB 12 GB   *   Disk 3   Online 29 GB 29 GB   *
  5. Type

    select disk 1

    to select disk 1 as the existing disk that you want to mirror.

  6. Type

    list partition

    to list the current partitions. The list will look like

       Partition ### Type         Size    Offset   ------------- ------------ ------- ------    Partition 1   Dynamic Data 10 GB   32 KB   Partition 2   Dynamic Data 6001 MB 10 GB   Partition 3   Dynamic Data 6001 MB 16 GB   Partition 4   Dynamic Data 6621 MB 21 GB 
  7. Type

    select partition 

    to select the partition for which you want to add a mirrored disk.

  8. Type

    add disk 

    to add a new disk, which will mirror the disk you selected in Step 5.

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