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Disk Online Errors Status Healthy (At Risk)

The Online (Errors) status occurs when I/O errors are detected on a region of a dynamic disk. A warning icon appears on the dynamic disk with errors.

If the I/O errors are temporary, reactivate the disk. This returns the disk to the Online status.

For instructions describing how to fix disks with Online (Errors) status
A dynamic volume's status is Healthy (At Risk).

Cause:

Indicates that the dynamic volume is currently accessible, but I/O errors have been detected on the underlying dynamic disk. If an I/O error is detected on any part of a dynamic disk, all volumes on the disk display the Healthy (At Risk) status and a warning icon appears on the volume.

When the volume status is Healthy (At Risk), an underlying disk's status is usually Online (Errors).

Solution:

Return the underlying disk to the Online status. Once the disk is returned to Online status, the volume should return to the Healthy status. If the Healthy (At Risk) status persists, the disk might be failing. Back up the data and replace the disk as soon as possible. For instructions describing how to bring the disk back online Read Further.

To reactivate a missing or offline dynamic disk
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 disk marked Missing or Offline, and then click Reactivate Disk.
The disk should be marked Online after the disk is reactivated.

Notes

To open Computer Management, click Start, and then click Control Panel. Double-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 might 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 Command Prompt:

Open Command Prompt.
Type:
diskpart

At the DISKPART prompt, type:
list disk

Make note of the disk number of the disk that you want to bring online.

At the DISKPART prompt, type:
select disk n

At the DISKPART prompt, type:
online
Disk Online Errors Status Healthy (At Risk) Disk Online Errors Status Healthy (At Risk) Reviewed by Imran Baig on 2:29:00 PM Rating: 5
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