Volume to physical drive
Volumes are made up of one or more partitions, which reside on disks. So, E: doesn't necessarily map to a single disk in the system (think software RAID).
The way you map volumes to the PhysicalDrive names in Win32 is to first open the volume and then send IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS. This will give you a structure that has one DISK_EXTENT entry for every partition that the volume spans:
typedef struct _VOLUME_DISK_EXTENTS { DWORD NumberOfDiskExtents; DISK_EXTENT Extents[ANYSIZE_ARRAY];} VOLUME_DISK_EXTENTS, *PVOLUME_DISK_EXTENTS;
The extents have a disk number in them:
typedef struct _DISK_EXTENT { DWORD DiskNumber; LARGE_INTEGER StartingOffset; LARGE_INTEGER ExtentLength;} DISK_EXTENT, *PDISK_EXTENT;
The DiskNumber is what goes into the PhsyicalDriveX link, so you can just sprintf that number with "\\.\PhysicalDrive%d"
-scott
Since you're using WMI anyway, start with Win32_LogicalDiskToPartition
. On the Win32_LogicalDisk
side, the Caption will be the drive letter. Then use Win32_DiskDriveToDiskPartition
to see what physical drive holds that partition.