It works, it works.Thanks to Nicklas Bondesson. I compiled the Kernel 2.4.25 (the latest one of the 2.4.X, I think), as it says in the tutorial in the web: http://www.tldp.org/HOWTO/ATA-RAID-HOWTO/nativeraid.html (I put the URL here for if someone has the same problem) And my PROMISE Raid Ultra Lite 100, with the PDC20265 controllers works fine. No hangs up, no Kernel Panics... ¡¡Perfect!! Now the next mission is to discover if it also works on the 2.6.3 Kernel. I'll keep you online. XD