Convert drive letter to partition id / drive id

Question

Given the drive letter, how do I get the OSImage InstallTo Partition ID and Drive ID without using the registry?

Answer 1

The Win32_DiskPartition WMI Win32_DiskPartition is what I need. Now, to figure out how to use WMI to get this information from the drive letter.

Win32_LogicalDisk also useful. An example of MSDN and https://stackoverflow.com/a/167379/

Update: Hmm, that doesn't work! In any case, not in the Windows installer ( WMI is not in Windows PE ), so I use a different QueryDosDevice answer (for example, \\.\PhysicalDisk1\Partition0 ) and hack it together. This sucks Microsoft, take the damn way in your installer.

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Answer: IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS works to get Disk ID . And DeviceIoControl IOCTL_DISK_GET_PARTITION_INFO_EX (thanks TLama) gets me a Partition ID .

Answer 2

Have you tried just calling QueryDosDevice ?