Using the Windows interface
1.
Open Computer Management (Local).
2.
In the console tree, click Computer Management (Local), click Storage, and then click Disk Management.
3.
Right-click the simple volume you want to mirror, click Add Mirror, and then follow the instructions on your screen.
Notes•
To perform this procedure on a local computer, you must be a member of the Backup Operators group or Administrators group on the local computer, or you must have been delegated the appropriate authority. To perform this procedure remotely, you must be a member of the Backup Operators group or Administrators group on the remote computer. If the computer is joined to a domain, members of the Domain Admins group might be able to perform this procedure. As a security best practice, consider using Run as to perform this procedure. For more information, see Default local groups, Default groups, and Using Run as.
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To open Computer Management, click Start, click Control Panel, double-click Administrative Tools, and then double-click Computer Management.
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You can mirror volumes only on computers running Windows 2000 Server, Windows 2000 Advanced Server, Windows 2000 Datacenter Server, or Windows Server 2003 operating systems.
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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.)
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You need at least two dynamic disks to create a mirrored volume.
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Mirrored volumes are fault tolerant and use RAID-1, which provides redundancy by creating two identical copies of a volume.
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Mirrored volumes cannot be extended.
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Both copies (mirrors) of the mirrored volume share the same drive letter.