To replace the failed mirror with a new mirror on another disk

If the disk containing part of the mirrored volume is missing and the volume does not return to Healthy status, you should replace the failed mirror with a new mirror on another disk.

1.

Open Computer Management (Local) 

2.

In the console tree, click Disk Management.

Where?

Computer Management (Local) > Storage > Disk Management

3.

Right-click the mirror on the Missing or Offline disk, and then click Remove Mirror. Follow the instructions on your screen.

4.

Right-click the volume to be re-mirrored, and then click Add Mirror. Follow the instructions on your screen.

 Important

Before installing a new disk, break the mirror and then examine the system log to see if the disk or the disk controller is failing. If the failing mirror is on a controller that is failing, installing a new disk on the failing controller will not solve the problem. For instructions describing how to open Event Viewer to examine the system log, see Related Topics.

Note

Related Topics

Troubleshooting

Volume status descriptions

Disk status descriptions

Using mirrored volumes

View more details about an event

Event Viewer overview

Using Event Viewer

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. 

To replace a mirror in the mirrored volume, you must have a dynamic disk with unallocated space that is at least as large as the region to repair. If you don't have a dynamic disk with enough unallocated space, the Add Mirror command 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.)

If you are replacing one of the disks in a mirrored system volume, be sure to use an identical disk to the one you are replacing. Otherwise, startup problems might occur if the disks use different geometries or if the system volumes are at different offsets on the disks. Always test your configuration by attempting to start from each volume to ensure that you can actually start if one of the disks fails. For more information about mirroring the system volume, see "Disk Management" at the Microsoft Resource Kits Web site.



© 2015 Microsoft Corporation. All rights reserved. Contact Us |Terms of Use |Trademarks |Privacy & Cookies