amd64/95554: undetected sata drive on 6.1, detected on 6.0

[m0rf]

I have same problem on FreeBSD (6.0, 6.1, 7.0) with 3 SATA disks Seagate 
Barracuda ST3120813AS on mother board Gigabyte K8N51PVMT-9 - GF6150. 
While booting system don't recognize one disk which is in or out of SATA 
array. I tried boot DragonFlyBSD which have FreeBSD 5.4 kernel and all 
disks was detected successfully...

dmesg (dragon fly founded once more disk with device name ad10):
Copyright (c) 1992-2006 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 7.0-CURRENT #0: Sat Apr 29 06:45:21 CEST 2006
    root@:/usr/obj/usr/src/sys/GENERIC
WARNING: WITNESS option enabled, expect reduced performance.
ACPI APIC Table: <GBT    AWRDACPI>
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Athlon(tm) 64 Processor 3700+ (2210.08-MHz K8-class CPU)
  Origin = "AuthenticAMD"  Id = 0x20f71  Stepping = 1
  
Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
  Features2=0x1<SSE3>
  AMD Features=0xe2500800<SYSCALL,NX,MMX+,FFXSR,LM,3DNow+,3DNow>
  AMD Features2=0x1<LAHF>
usable memory  = 994975744 (948 MB)
avail memory = 958840832 (914 MB)
ioapic0 <Version 1.1> irqs 0-23 on motherboard
kbd1 at kbdmux0
acpi0: <GBT AWRDACPI> on motherboard
acpi_bus_number: can't get _ADR
acpi_bus_number: can't get _ADR
acpi0: Power Button (fixed)
acpi_bus_number: can't get _ADR
acpi_bus_number: can't get _ADR
acpi_bus_number: can't get _ADR
acpi_bus_number: can't get _ADR
cpu0: <ACPI CPU> on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pci0: <memory, RAM> at device 0.0 (no driver attached)
pci0: <memory, RAM> at device 0.1 (no driver attached)
pci0: <memory, RAM> at device 0.2 (no driver attached)
pci0: <memory, RAM> at device 0.3 (no driver attached)
pci0: <memory, RAM> at device 0.4 (no driver attached)
pci0: <memory, RAM> at device 0.5 (no driver attached)
pci0: <memory, RAM> at device 0.6 (no driver attached)
pci0: <memory, RAM> at device 0.7 (no driver attached)
vgapci0: <VGA-compatible display> mem 
0xf2000000-0xf2ffffff,0xe0000000-0xefffffff,0xf3000000-0xf3ffffff irq 16 
at device 5.0 on pci0
pci0: <memory, RAM> at device 9.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 10.0 on pci0
isa0: <ISA bus> on isab0
pci0: <serial bus, SMBus> at device 10.1 (no driver attached)
pci0: <memory, RAM> at device 10.2 (no driver attached)
ohci0: <OHCI (generic) USB controller> mem 0xf5108000-0xf5108fff irq 21 
at device 11.0 on pci0
ohci0: [GIANT-LOCKED]
usb0: OHCI version 1.0, legacy support
usb0: SMM does not respond, resetting
usb0: <OHCI (generic) USB controller> on ohci0
usb0: USB revision 1.0
uhub0: <nVidia OHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb0
uhub0: 8 ports with 8 removable, self powered
ehci0: <EHCI (generic) USB 2.0 controller> mem 0xf5104000-0xf51040ff irq 
22 at device 11.1 on pci0
ehci0: [GIANT-LOCKED]
usb1: EHCI version 1.0
usb1: companion controller, 8 ports each: usb0
usb1: <EHCI (generic) USB 2.0 controller> on ehci0
usb1: USB revision 2.0
uhub1: <nVidia EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb1
uhub1: 8 ports with 8 removable, self powered
atapci0: <nVidia nForce MCP51 UDMA133 controller> port 
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xf000-0xf00f at device 13.0 on pci0
ata0: <ATA channel 0> on atapci0
ata1: <ATA channel 1> on atapci0
atapci1: <nVidia nForce MCP51 SATA300 controller> port 
0x9f0-0x9f7,0xbf0-0xbf3,0x970-0x977,0xb70-0xb73,0xd800-0xd80f mem 
0xf5107000-0xf5107fff irq 23 at device 14.0 on pci0
ata2: <ATA channel 0> on atapci1
ata3: <ATA channel 1> on atapci1
atapci2: <nVidia nForce MCP51 SATA300 controller> port 
0x9e0-0x9e7,0xbe0-0xbe3,0x960-0x967,0xb60-0xb63,0xc400-0xc40f mem 
0xf5106000-0xf5106fff irq 20 at device 15.0 on pci0
ata4: <ATA channel 0> on atapci2
ata5: <ATA channel 1> on atapci2
pcib1: <ACPI PCI-PCI bridge> at device 16.0 on pci0
pci1: <ACPI PCI bus> on pcib1
fwohci0: <VIA Fire II (VT6306)> port 0xa000-0xa07f mem 
0xf5000000-0xf50007ff irq 18 at device 14.0 on pci1
fwohci0: OHCI version 1.0 (ROM=1)
fwohci0: No. of Isochronous channels is 4.
fwohci0: EUI64 00:00:14:85:00:3b:53:a5
fwohci0: Phy 1394a available S400, 2 ports.
fwohci0: Link S400, max_rec 2048 bytes.
firewire0: <IEEE1394(FireWire) bus> on fwohci0
fwe0: <Ethernet over FireWire> on firewire0
if_fwe0: Fake Ethernet address: 02:00:14:3b:53:a5
fwe0: Ethernet address: 02:00:14:3b:53:a5
fwe0: if_start running deferred for Giant
sbp0: <SBP-2/SCSI over FireWire> on firewire0
fwohci0: Initiate bus reset
fwohci0: node_id=0xc800ffc0, gen=1, CYCLEMASTER mode
firewire0: 1 nodes, maxhop <= 0, cable IRM = 0 (me)
firewire0: bus manager 0 (me)
pci0: <multimedia> at device 16.1 (no driver attached)
nve0: <NVIDIA nForce MCP13 Networking Adapter> port 0xb000-0xb007 mem 
0xf5105000-0xf5105fff irq 22 at device 20.0 on pci0
nve0: Ethernet address 00:14:85:3f:14:e3
miibus0: <MII bus> on nve0
ciphy0: <Cicada CS8201 10/100/1000TX PHY> on miibus0
ciphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 
1000baseT-FDX, auto
nve0: Ethernet address: 00:14:85:3f:14:e3
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on 
acpi0
sio0: type 16550A
sio0: [FAST]
ppc0: <Parallel port> port 0x378-0x37f,0x778-0x77b irq 7 on acpi0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
ppc0: [GIANT-LOCKED]
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model IntelliMouse Explorer, device ID 4
orm0: <ISA Option ROM> at iomem 0xd0000-0xd3fff pnpid ORM0000 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 2210075853 Hz quality 800
Timecounters tick every 1.000 msec
module_register_init: MOD_LOAD (amr_linux, 0xffffffff8061f040, 0) error 6
acd0: DVDR <HL-DT-ST DVDRAM GSA-4167B/DL12> at ata0-master UDMA33
ad4: 114472MB <Seagate ST3120827AS 3.42> at ata2-master SATA150
ad8: 114472MB <Seagate ST3120827AS 3.42> at ata4-master SATA150
Trying to mount root from ufs:/dev/ad4s2a

atacontrol:
ATA channel 0:
    Master: acd0 <HL-DT-ST DVDRAM GSA-4167B/DL12> ATA/ATAPI revision 5
    Slave:       no device present
ATA channel 1: no devices
ATA channel 2:
    Master:  ad4 <ST3120827AS/3.42> Serial ATA v1.0
    Slave:       no device present
ATA channel 3: no devices
ATA channel 4:
    Master:  ad8 <ST3120827AS/3.42> Serial ATA v1.0
    Slave:       no device present
ATA channel 5: no devices