To reactivate a missing or offline dynamic disk
Using the Windows interface
1. | Open Computer Management (Local) |
2. | In the console tree, click Disk Management. Where? Computer Management (Local) > Storage > Disk Management |
3. | Right-click the disk marked Missing or Offline, and then click Reactivate Disk. The disk should be marked Online after the disk is reactivated. |
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. |
| • | A dynamic disk may become Missing when it is corrupted, powered down, or disconnected. |
| • | A dynamic disk may become Offline if it is corrupted or intermittently unavailable. A dynamic disk may also become Offline if you attempt to import a foreign (dynamic) disk and the import fails. An error icon appears on the Offline disk. Only dynamic disks display the Missing or Offline status. |
| • | Only dynamic disks can be reactivated. |
Using a command line
1. | Open Command Prompt |
2. | Type: diskpart |
3. | At the DISKPART prompt, type: list disk Make note of the disk number of the disk that you want to bring online. |
4. | At the DISKPART prompt, type: select disk n |
5. | At the DISKPART prompt, type: online |
| Value | Description |
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. |
select disk n | Sets the focus to the specified disk, where n is the disk number. |
online | Brings an offline disk or volume with focus online. |
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. |
| • | A dynamic disk may become Missing when it is corrupted, powered down, or disconnected. |
| • | A dynamic disk may become Offline if it is corrupted or intermittently unavailable. A dynamic disk may also become Offline if you attempt to import a foreign (dynamic) disk and the import fails. An error icon appears on the Offline disk. Only dynamic disks display the Offline status. |
| • | Only dynamic disks can be reactivated. |
| • | For more information about DiskPart, see Related Topics. |
Related Topics
| • | |
| • | |
| • |