How do I correlate logical drives and physical disks in C#?

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I'm struggling to understand how to link the information of logical drives (C:\, D:\ etc) is on which physical drive (HDD, SATA, NVMe etc).

I'm able to pull the information separately using ManagementObject queries of both MSFT_PhysicalDisk and Win32_LogicalDisk classes but combining the two accurately is proven a real head scratcher.

A quick google threw up that I needed to use Win32_DiskDriveToDiskPartition and Win32_LogicalDiskToPartition classes but reading them just made my head hurt more. Any help would be appreciated but I'm basically after a way to show both class information side by side accurately:

ie:

C:\ is on PhysicalDrive0 (SSD)
D:\ is on PhysicalDrive1 (NVMe)
E:\ is on PhysicalDrive2 (HDD)

Cheers!

What I have tried:

I have tried piecing the information together in really janky methods (even trying to use an int list... don't ask it was a disaster) but it's not consistent.

Posted 13-Apr-22 6:57am

Member 14740628

Updated 14-Apr-22 3:29am

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Graeme_Grant · Answer 1 · 2022-04-13T08:22:00

A quick couple of Google Searches returned the following:
1. DriveInfo Class (System.IO) | Microsoft Docs[^]
2. .net - What is the easiest way in C# to check if hard disk is SSD without writing any file on hard disk? - Stack Overflow[^]
3a. How do I enumerate NVMe (M2) drives an get their temperature in c#? - Stack Overflow[^]
3b. C# Get Disk/Drive Physical/Logical and Smart Information · GitHub[^]

Searches used:
1. c# drive info[^]
2. c# drive ssd[^]
3. c# drive is NVMe[^]

If you research using the above Google Searches, you might find better solutions that fit your needs...

JudyL_MD · Answer 2 · 2022-04-14T03:29:00

It's not straightforward. Having a WMI browser makes it much easier to jump around and look at all the objects.

Enumerate Win32_LogicalDiskToPartition.
- the Dependent field will give you a value like machinename\root\cimv2:Win32_LogicalDisk.DeviceID="C:"

Once you have the entry with the correct Dependent field, look at its Antecedent field. It will point you to the correct drive and partition ... machinename\root\cimv2:Win32_DiskPartition.DeviceID="Disk #0, Partition #0"

Now, enumerate Win32_DiskDriveToDiskPartition.
- find the entry whose Dependent value matches the prior Antecedent

Once you have the entry with the correct Dependent field, look at the Antecedent field. It will point you to the correct physical drive ... machinename\root\cimv2:Win32_DiskDrive.DeviceID="\\.\PHYSICALDRIVE0"

You can now enumerate Win32_DiskDrive and find the entry whose "Name" field matches that physical drive ID

How do I correlate logical drives and physical disks in C#?

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