Question about the DTM Client hardware signature

NTDEV
1

I have a question about the following paragraph from the DTM Installation Guide found at http:.

Note: DTM Client is designed to identify itself to the controller through the hardware signature. Therefore, having multiple separate installs, even across OS installs, is not supported. If DTM client detects a previous installation of the client, it will use that information in lieu of any specified directories.

My question is what exactly goes into calculating this hardware signature? Will changing the primary hard drive in a computer be enough to change the hardware signature thus allowing multiple test environments to be set up on one PC? I ask this question because the company I work for is in the process of obtaining a WHQL digital signature for some device drivers that are used by an application we develop and we are trying to determine how many systems we need for our DTM lab.

I would appreciate any input you might have on this question.

Thanks.</http:>

2

Have you actually tried using a single machine to collect test results from multiple OS’es? In past WLK’s, I’m certain that I was able to run tests on a machine, collect the logs, remove the client from the controller, drop a new OS image on the test machine, add the client back into the controller, and run a new set of tests.

Perhaps something has changed and this no longer works, but it used to be possible.

3

That process works for me too.

I believe that the key thing is that after running the test on one OS you
must delete the DTM client from the DTM controller. Then re-image the client
and add it back into the DTM controller.

If the same client (same MAC address) appears as two different clients in
the DTM then there are problems. IOW: In my experience DTM identifies client
by MAC address and doesn’t differentiate by OS. At least on 1.5.

FWIW,

Thomas F. Divine

From:
Sent: Thursday, February 03, 2011 6:17 PM
To: “Windows System Software Devs Interest List”
Subject: RE:[ntdev] Question about the DTM Client hardware signature

> Have you actually tried using a single machine to collect test results
> from multiple OS’es? In past WLK’s, I’m certain that I was able to run
> tests on a machine, collect the logs, remove the client from the
> controller, drop a new OS image on the test machine, add the client back
> into the controller, and run a new set of tests.
>
> Perhaps something has changed and this no longer works, but it used to be
> possible.
>
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4

I would like to thank both Jeff Glass and Thomas Divine for their response to my question. It helps.