Writing to /sys/class/scsi_host/hostX/scan on SAS controllers (e.g. Adaptec smartpqi/PM8222-SHBA) triggers sas_user_scan which blocks indefinitely, causing the audit to hang forever. Skip hosts that appear under /sys/class/sas_host/ — SAS topology is discovered by the driver. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>