Where is the Primary Disk Group in Vista

Question

Prior to Vista (2003, XP) Windows had a key in the registry

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\dmio\Boot Info\Primary Disk Group 

which indicated which dynamic disk group is imported/active on this installation.

Since Vista, this key is gone. Still, the OS needs to store that info in some way, since the same disk group, when imported on another machine won't auto import again (i.e. if the dynamic disks are on a SAN, each time a Vista boots, other Vistas see the disks as foreign).

My question in short is - where is this information (Primary disk group for this machine) stored in Vista

Answer 1

Turned out dmio is replaced by volmgrx. The same information is at:

\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\Services\\volmgrx