Symbol: AHCI_Q_SATA1_UNIT0
sys/dev/ahci/ahci.c
830
if ((ctlr->quirks & AHCI_Q_SATA1_UNIT0) && ch->unit == 0)
sys/dev/ahci/ahci_pci.c
505
ctlr->quirks |= AHCI_Q_SATA1_UNIT0;