Dynamic Volume Manager (volmgrx) Service Defaults in Windows 7
Extension of the volume manager driver that manages software RAID volumes (spanned, striped, mirrored, RAID-5) on dynamic disks.
Default Settings
| Startup type: | Boot |
| Display name: | Dynamic Volume Manager |
| Service name: | volmgrx |
| Service type: | kernel |
| Error control: | critical |
| Group: | System Bus Extender |
| Path: | %SystemRoot%\System32\drivers\volmgrx.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\volmgrx |
Default Behavior
Dynamic Volume Manager is a kernel device driver. In Windows 7 it is being loaded by Boot Loader before Kernel initialization. If Dynamic Volume Manager fails to load, Windows 7 attempts to write the error data into Event Log and restart the computer, using the Last Known Good configuration. If the Last Known Good configuration is not valid, Windows 7 startup ends with a Stop error. If you remove or disable the volmgrx service, Windows 7 won't start.
Restore Default Startup Configuration of Dynamic Volume Manager
1. Run the Command Prompt as an administrator.
2. Copy the commands below, paste them into the command window and press ENTER:
sc config volmgrx start= boot
sc start volmgrx
3. Close the command window and restart the computer.
The volmgrx service is using the volmgrx.sys file that is located in the C:\Windows\System32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 7 installation media.