Please ensure that current RedHat x86 Linux releases build with the latest Advansys v3.3a SCSI driver. Looks like RH6.x is still using v3.2M. Computer: Dell Dimension XPS T600r 256MB RAM (1) Advansys ASB-3940u2w scsi adaptor (2) Seagate 36XP Ultra2/LVD) disk drives Symptom: moderate disk activity on scsi bus hangs the system Solution: create a new module using v3.3a of the Advansys driver and problem is fixed. Thanks.