ata-lowlevel.c and lost disk

Hello there!

For versions of ata-lowlevel.c > 1.9 the ad1 device isn't found.
Below is working dmesg with ata-lowlevel.c 1.9.

        -Richard

Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 5.1-CURRENT #2: Tue Sep 16 20:46:17 CEST 2003
    rnyberg_at_bsd.local:/usr/obj/usr/src/sys/GROMIT
Preloaded elf kernel "/boot/kernel/kernel" at 0xc0499000.
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc04991f4.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Pentium III/Pentium III Xeon/Celeron (501.14-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x673  Stepping = 3
  Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
real memory  = 402587648 (383 MB)
avail memory = 385961984 (368 MB)
Pentium Pro MTRR support enabled
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <MSISYS MS-6163W> on motherboard
pcibios: BIOS version 2.10
Using $PIR table, 8 entries at 0xc00fd4c0
acpi0: power button is handled as a fixed feature programming model.
Timecounter "ACPI-safe" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x4008-0x400b on acpi0
acpi_cpu0: <CPU> on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0x5000-0x500f,0x4000-0x4041,0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib0: slot 7 INTD is routed to irq 10
pcib0: slot 14 INTA is routed to irq 11
pcib0: slot 16 INTA is routed to irq 12
pcib0: slot 18 INTA is routed to irq 5
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pcib0: slot 1 INTA is routed to irq 11
pcib1: slot 0 INTA is routed to irq 11
pci1: <display, VGA> at device 0.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 UDMA33 controller> port 0xf000-0xf00f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata0: [MPSAFE]
ata1: at 0x170 irq 15 on atapci0
ata1: [MPSAFE]
pci0: <serial bus, USB> at device 7.2 (no driver attached)
pci0: <bridge, PCI-unknown> at device 7.3 (no driver attached)
fxp0: <Intel 82550 Pro/100 Ethernet> port 0xe400-0xe43f mem 0xec000000-0xec01ffff,0xec021000-0xec021fff irq 11 at device 14.0 on pci0
fxp0: Ethernet address 00:02:b3:a7:68:1f
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
xl0: <3Com 3c905C-TX Fast Etherlink XL> port 0xe800-0xe87f mem 0xec020000-0xec02007f irq 12 at device 16.0 on pci0
xl0: Ethernet address: 00:50:da:dd:2f:21
miibus1: <MII bus> on xl0
xlphy0: <3c905C 10/100 internal PHY> on miibus1
xlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pci0: <multimedia, audio> at device 18.0 (no driver attached)
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> port 0x3f7,0x3f2-0x3f5 irq 6 drq 2 on acpi0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A
sio1 port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
orm0: <Option ROMs> at iomem 0xc8000-0xc9fff,0xc0000-0xc7fff on isa0
pmtimer0 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 501138255 Hz quality 800
Timecounters tick every 10.000 msec
IP Filter: v3.4.31 initialized.  Default = pass all, Logging = disabled
acpi_cpu: throttling enabled, 8 steps (100% to 12.5%), currently 100.0%
GEOM: create disk ad0 dp=0xc3364e70
ad0: 19574MB <IBM-DPTA-372050> [39770/16/63] at ata0-master UDMA33
GEOM: create disk ad1 dp=0xc3364d70
ad1: 57241MB <ST360021A> [116301/16/63] at ata0-slave UDMA33
Mounting root from ufs:/dev/ad0s1a