thanks Mike, but atill not working ... I copy you the scssi messages of the "less +F /var/log/messages" command: Nov 22 14:32:18 localhost kernel: SCSI subsystem initialized Nov 22 14:32:18 localhost kernel: aha152x: BIOS test: passed, 1 controller(s) configured Nov 22 14:32:20 localhost kernel: aha152x: resetting bus... Nov 22 14:32:20 localhost kernel: aha152x0: vital data: rev=1, io=0x140 (0x140/0x140), irq=9, scsiid=7, reconnect=enabled, parity=enabled, synchronous=disabled, delay=1000, extended translation=disabled Nov 22 14:32:20 localhost kernel: aha152x0: trying software interrupt, lost. Nov 22 14:32:20 localhost kernel: aha152x0: irq 9 possibly wrong. Please verify.