Which disk does \Device\Harddisk\DR relate to?

Windows 7

Hi,

I'm trying to get a definitive statement on how to map event log errors that reference this:

\Device\Harddisk<X>\DR<Y> where X and Y are numbers (not the same)

onto the actual hard disk. My question is: what exactly are X and Y? To be clear: I don't want to know how to run chkdsk. What I would like to know is what X and Y exactly relate to?

Let's look at previous non-answers:

1. http://social.technet.microsoft.com/Forums/windowsserver/en-US/2e3d2e68-a4e7-49b7-9d70-7b70c166a1c9/how-to-find-out-which-hdd-is-deviceharddiskdr-

Three "answers" were given in the above thread:

1.       Unplug USB drives until the error goes away. This is a) clearly not a practical answer (especially if you don't have USB drives!). And b) it doesn't answer the question of how the numbering in the event log error relates to the installed drives.
2.       http://support.microsoft.com/kb/159865. This article points to registry settings that disappeared in Windows 2000.
3.       "Y and X are the same". That is just plain wrong.

So, the above thread was not actually answered. (The "unplug USB devices" was oddly, marked as an answer.)

2. http://forum.sysinternals.com/the-device-deviceharddisk0d-has-a-bad-block_topic19288.html

Same question and lots of posts about how to fix the problem. But, the final post (helpful at last but not from Microsoft unfortunately) does say that "X" is simply the disk number in disk manager.Is this right? Also, what is "Y"?

3. http://www.storageforum.net/forum/showthread.php/8783-The-driver-detected-a-controller-error-on-Device-Harddisk1-DR1

This incorrectly states that Y is the disk number. How do I know this is incorrect? I for example, see "DR5" in the error but I only have 3 disks! The first post above also complains of the same problem, so we are no nearer knowing what Y actually is.

4. http://windowssecrets.com/forums/showthread.php/137928-Which-disk-is-this-Device-Harddisk2-DR2

The answer here is a very generic "look in disk manager". But, this does not actually answer the question.

5. http://windowssecrets.com/forums/showthread.php/137928-Which-disk-is-this-Device-Harddisk2-DR2

Same problem but no answer provided.

6. http://www.techsupportforum.com/forums/f149/the-driver-detected-a-controller-error-on-device-harddisk1-dr-639571.html

The answer here is that Y should be a number, which indeed it is, but that doesn't really help answer the question.

I'm hoping that someone from MS here will post a definite statement (and not ask me for more details of "my" error, post links to 13 year old technet articles, or explain how to run chkdsk).J

TIA

Mark