Monday, December 13, 2010


Reactivate Missing Or Offline Dynamic Disk Storage Services

Have you ever noticed that when windows returning from sleep, approximately 50% of the time, the dynamic disk disappears completely - It's will not be visible in disk nor device management, and likewise, it's drive letter becomes available for reuse and the disk disappears from Computer. And the disk will return to use after a full reboot. Does it have anything to do with hardware configuration or hardware compatibility.

This certainly is a problem with hardware compatibility. And here is a work around on how to solve this problem.
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.
To work around this issue, I suggest you use the diskpart command lines to reactivate the dynamic disk when the disk is not shown.

Reactivate a missing or offline dynamic disk Storage Services; Local File Systems

Please note that you reactivate a missing or offline dynamic disk in two ways.
  • Using the Windows interface
  • Using a command line
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 disk marked Missing or Offline, and then click Reactivate Disk.
The disk should be marked Online after the disk is reactivated.
  • To open Computer Management, click Start, click Control Panel, double-click Administrative Tools, and then double-click Computer Management.
  • 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:
  • 3. At the DISKPART prompt, type:
list disk
Make note of the disk number of the missing or offline disk that you want to bring online. Missing disks are numbered M0, M1, M2, etc. and offline disks are numbered 0, 1, 2, etc.
  • 4. At the DISKPART prompt, type:
select diskn
  • 5. At the DISKPART prompt, type:


About bench3 -

Haja Peer Mohamed H, Software Engineer by profession, Author, Founder and CEO of "bench3" you can connect with me on Twitter , Facebook and also onGoogle+

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