Re: How to unique identify a PC by it's hardware info rmation?

NTDEV
1

MAC address are very easy to alter. I always thought disk serial number
provide good identification, but I may be wrong. Can you provide example of
manufacturer with zero serial number.

I have another question, may not be directly related to unique
identification, but can anyone tell me how do I get motherborad and
memory/SPD information directly from hardware (not from any Windows API like
WMI).

Regards.
Yusuf

-----Original Message-----
From: Loren Wilton [mailto:xxxxx@earthlink.net]
Sent: Friday, May 09, 2003 9:31 AM
To: NT Developers Interest List
Subject: [ntdev] Re: How to unique identify a PC by it’s
hardware information?

MAC address on the network card.

I’ve seen too many systems that all had the same disk serial
number, usually
zero.

Loren

2

SCSI disks respond to
struct _CDB6INQUIRY {
UCHAR OperationCode;
UCHAR Reserved1 : 5;
UCHAR LogicalUnitNumber : 3;
UCHAR PageCode;
UCHAR IReserved;
UCHAR AllocationLength;
UCHAR Control;
} CDB6INQUIRY, *PCDB6INQUIRY;

with a mode page code of 0x80 and produce in exchange a unique serial
number. See the SCSI spec(s) for the format of the returned serial number
data. Be careful about some vendors, they may not return ascii data as per
the spec, so you may have to alter the results.

-----Original Message-----
From: Crasher Guo [mailto:xxxxx@sinfors.com.cn]
Sent: Friday, May 09, 2003 4:42 AM
To: NT Developers Interest List
Subject: [ntdev] Re: How to unique identify a PC by it’s
hardware information?

Hi,Loren Wilton

Thanks for you idea. But many computer doesn’t have any
Network Adapter!

======= 2003-05-08 21:00:00 You wrote=======

>MAC address on the network card.
>
>I’ve seen too many systems that all had the same disk serial number,
>usually zero.
>
> Loren
>
>
>
>—
>You are currently subscribed to ntdev as: xxxxx@sinfors.com.cn To
>unsubscribe send a blank email to xxxxx@lists.osr.com

= = = = = = = = = = = = = = = = = = = =

Crasher Guo
xxxxx@sinfors.com.cn
2003-05-09

You are currently subscribed to ntdev as:
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3

> -----Original Message-----

From: Loren Wilton [mailto:xxxxx@earthlink.net]
Sent: Thursday, May 08, 2003 9:01 PM


> I’ve seen too many systems that all had the same disk serial
> number, usually
> zero.


Really? You’re saying you’ve actually found not one but MANY ATA devices
that, when issued a IDENTIFY DEVICE command (command code ECh of the
ATA/ATAPI-6 spec), actually return zeros in words 10-19 (Serial number = 20
ASCII chars) of the IDENTIFY DEVICE information?

Having worked with ATA devices for over two years now, I’m impressed. I’ve
issued this command to…many…hard drives, and they ALL report their
Serial Number. Note that the model number is returned in words 27-46 (Model
number = 40 ASCII chars). Not all vendors are rigorous about
differentiating their hardware, but a combination of disk Model/SerialNumber
should be sufficient to uniquely identify a system.

Harmony,

–Christine