To add a mirror to an existing simple volume

Using the Windows interface

Open Computer Management (Local)

In the console tree, click Disk Management.

Where?

Computer Management (Local) > Storage > Disk Management

Right-click the simple volume you want to mirror, click Add Mirror, and then follow the instructions on your screen.

Note

•	To open Computer Management, click Start, and then click Control Panel. Click Performance and Maintenance, click Administrative Tools, and then double-click Computer Management.
•	You must be logged on as an administrator or a member of the Administrators group in order to complete this procedure. If your computer is connected to a network, network policy settings may also prevent you from completing this procedure.
•	You can mirror volumes only on computers running Windows 2000 Server, Windows 2000 Advanced Server, Windows 2000 Datacenter Server, or .
•	Any existing simple volume can be mirrored onto another dynamic disk, as long as there is sufficient unallocated space on that disk. If you do not have a dynamic disk with enough unallocated space, the Add Mirror menu item is unavailable. (To verify you have enough space, right-click the disk, click Properties, and then check the size in Unallocated Space. This size may be slightly smaller than shown in the graphical and list views.)
•	Mirrored volumes are fault tolerant and use RAID-1, which provides redundancy by creating two identical copies of a volume.
•	You cannot extend a simple volume after it has been mirrored.
•	Both copies (mirrors) of the mirrored volume share the same drive letter.

Using a command line

1.	Open Command Prompt
2.	Type: diskpart
3.	At the DISKPART prompt, type: list volume Make note of the number of the simple volume that you want to mirror onto another disk.
4.	At the DISKPART prompt, type: select volume n Select the simple volume, n, you want to mirror onto another disk.
5.	At the DISKPART prompt, type: list disk Make note of the disk number of the disk on which you want to mirror the volume.
6.	At the DISKPART prompt, type: add disk n

Value	Description
list volume	Displays a list of basic and dynamic volumes on all disks.
select volume	Selects the specified volume, where n is the volume number, and shifts the focus to it. If no volume is specified, the select command lists the current volume with focus. You can specify the volume by number, drive letter, or mount point path. On a basic disk, selecting a volume also gives the corresponding partition focus.
list disk	Displays a list of disks and information about them, such as their size, amount of available free space, whether the disk is a basic or dynamic disk, and whether the disk uses the master boot record (MBR) or GUID partition table (GPT) partition style. The disk marked with an asterisk (*) has focus.
add disk n	Mirrors the simple volume with focus to the specified disk. The specified disk must have unallocated space at least as large as the size of the simple volume you want to mirror.

Note

•	To open command prompt, click Start, point to All Programs, point to Accessories, and then click Command Prompt.
•	You must be logged on as an administrator or a member of the Administrators group in order to complete this procedure. If your computer is connected to a network, network policy settings may also prevent you from completing this procedure.
•	You can mirror volumes only on computers running Windows 2000 Server, Windows 2000 Advanced Server, Windows 2000 Datacenter Server, or .
•	Mirrored volumes are fault tolerant and use RAID-1, which provides redundancy by creating two identical copies of a volume.
•	You cannot extend a simple volume after it has been mirrored.
•	Both copies (mirrors) of the mirrored volume share the same drive letter.
•	For more information about DiskPart, see Related Topics.

•	DiskPart
•	Break a mirrored volume into two volumes
•	Using mirrored volumes

Related Topics