#!/bin/sh
# DF-1211 reachability probe — device-controlled (NCQ log page 10h tag); no syscall path.
echo "[DF-1211] reachability probe"
echo "--- AHCI controller attached? ---"
pciconf -l 2>/dev/null | grep -iE "ahci|sata mass storage" || echo "  no AHCI/SATA controller"
echo "--- any SATA/ATA disks (ada)? ---"
ls /dev/ada* 2>/dev/null || echo "  no /dev/ada* (virtio-blk /dev/vbd0 only)"
echo
echo "[DF-1211] VERDICT: NCQ error path (ahci_port_read_ncq_error) unreachable"
echo "  on this guest (no AHCI controller). Bug is real (VERDICT.md) but NOT TESTABLE here."