hi
i could need some information what i have to give out to the disk by using OUT and IN commands to request its hardware id

PM would be nice thx

From what I can find, WMI is the proper way to do it, but maybe this will give you some ideas

http://www.winsim.com/diskid32/diskid32.html

Took a little more time and found a bit more then just that.. WMI was a fun back in the day, the scripomatic really helped..

http://us.generation-nt.com/answer/get-disk-information-help-164584541.html

http://msdn.microsoft.com/en-us/library/aa364939%28VS.85%29.aspx

http://stackoverflow.com/questions/782053/get-hdd-and-not-volume-serial-number-on-vista-ultimate-64-bit

http://www.winsim.com/diskid32/diskid32.cpp

Im guessing your writing a driver..So these solutions are probably are all wrong..