Disk Partition and Logical Drive information

Hi All,

Does anyone know if WMI can be used to get information about hidden logical
drives?

I have an extended partition that contains a hidden drive used to store
ghost type backup images of the primary partition.

The Windows XP disk management snap-in sees this drive as a logical drive in
an unknown partition and does not give it a drive letter. However it
correctly identifies the volume label, file system, status, capacity and
free space.

The WMI Win32_DiskPartition class identifies both partitions, the extended
partition having an 'Unknown' type. However the Win32_LogicalDisk class
does not see the hidden drive and, when enumerating all logical drive
instances, only records the c: drive and the cdrom drive.

Is there a way I can get WMI (or an API) to identify this hidden drive?

Thanks

Mark