ty Bâshrat the Sneaky for the attention on the pc installed 2006/02/23, with the controller problem solved with the file reported previously i have: initially a working 1.0.0.26 promise driver unpacked del mass storage 6021 package with 7zip in the system properties forced to use the driver located in D\M\P\2 rebooted: now i found a version 1.0.0.37: but markerd with a yellow exclamation mark, and, obviosuly the hds connected there are lost i forgot to say that during the xp installation, isn't possible to use any hds connected to that controller (isn't showed in the avaible devices list) i hope that this explanation is clear and can help u to solve this issue no prob for any further test regards, and ty Edit: i forgot too to say that this mainboard has two different controllers: one via and one promise the via one (with the system hd) works flawlessy