"GS" wrote

| What I posted was the Win32_DiskDrive equivalent of
| Garry's code. Win32_DiskDrive has a SerialNumber property.
| What I posted was just the scripted, direct-from-WMI
| version of your method. *It's all coming from the same
| place.* (Note that DeviceID also returns a
| unique value: The order of the disk as the system
| sees it: disk 0, disk 1, etc.)
|
| None of that matters if the return doesn't associate the serial# with its
| respective drive, which Andy's cmd line approach doesn't do. See my last
reply
| for a better solution...

I'm not sure that's better. Peter seemed to
be saying that one disk was not mounted.
So it wouldn't have drive letters. Also,
DeviceID will show the order they're plugged
in. Presumably SATA0 will show as disk0.

Personally, I still think a piece of tape on
one of them is a better method.

His actual question seemed to be theoretical
rather than practical. If he doesn't know which
disk is new and which is old when looking in
the case then a piece of tape will solve that.
Since he's cloning for replacement, he really
has no need to tell them apart from inside
Windows. He's not going to be running both.