atacontrol problems

Hi,
just playing with raids on 5.2.1-RC
atacontrol create RAID1 ad6 ad6
ar0 created
atacontrol detach 3
gives panic
I know this is not how i really should create raid, but... if its does not complains, it means it allowed.

error message and dmesg:

GEOM: create disk ar0 dp=0xc4725de0
ar0: 114473MB <ATA RAID1 array> [14593/255/63] status: READY subdisks:
 disk0 READY on ad6 at ata3-master
 disk1 READY on ad6 at ata3-master
ad6: deleted from ar0 disk0
ar0: WARNING - mirror lost
GEOM: destroy disk ad6 dp=0xc62fba60
ad6: WARNING - removed from configuration


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x4
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc045421e
stack pointer         = 0x10:0xd9cecad8
frame pointer         = 0x10:0xd9cecafc
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 70226 (atacontrol)
trap number = 12
panic: page fault
cpuid = 0; 
boot() called on cpu#0

syncing disks, buffers remaining... 3862 3862 3860 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 3858 
giving up on 3291 buffers
Uptime: 1d2h18m39s
pfs_vncache_unload(): 1 entries remaining
Shutting down ACPI
stray irq9
Automatic reboot in 15 seconds - press a key on the console to abort
Copyright (c) 1992-2004 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 5.2.1-RC #3: Sun Feb  1 21:01:15 EET 2004
    pilkis_at_freebsd.icnspot.net:/usr/obj/usr/src/sys/freebsd52
Preloaded elf kernel "/boot/kernel/kernel" at 0xc07f0000.
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc07f021c.
acpi_alloc_wakeup_handler: can't alloc wake memory
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2398.86-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf29  Stepping = 9
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Hyperthreading: 2 logical CPUs
real memory  = 536018944 (511 MB)
avail memory = 513695744 (489 MB)
ACPI APIC Table: <A M I  OEMAPIC >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
ioapic0 <Version 2.0> irqs 0-23 on motherboard
Pentium Pro MTRR support enabled
netsmb_dev: loaded
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <A M I  OEMXSDT > on motherboard
pcibios: BIOS version 2.10
Using $PIR table, 14 entries at 0xc00f5100
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
acpi_cpu0: <CPU> on acpi0
acpi_cpu1: <CPU> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0
pcib1: could not get PCI interrupt routing table for \\_SB_.PCI0.P0P1 - AE_NOT_FOUND
pci1: <ACPI PCI bus> on pcib1
uhci0: <Intel 82801EB (ICH5) USB controller USB-A> port 0xeec0-0xeedf irq 16 at device 29.0 on pci0
usb0: <Intel 82801EB (ICH5) USB controller USB-A> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1: <Intel 82801EB (ICH5) USB controller USB-B> port 0xef00-0xef1f irq 19 at device 29.1 on pci0
usb1: <Intel 82801EB (ICH5) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhci2: <Intel 82801EB (ICH5) USB controller USB-C> port 0xef20-0xef3f irq 18 at device 29.2 on pci0
usb2: <Intel 82801EB (ICH5) USB controller USB-C> on uhci2
usb2: USB revision 1.0
uhub2: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
uhci3: <Intel 82801EB (ICH5) USB controller USB-D> port 0xef40-0xef5f irq 16 at device 29.3 on pci0
usb3: <Intel 82801EB (ICH5) USB controller USB-D> on uhci3
usb3: USB revision 1.0
uhub3: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub3: 2 ports with 2 removable, self powered
pci0: <serial bus, USB> at device 29.7 (no driver attached)
pcib2: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci2: <ACPI PCI bus> on pcib2
pci2: <network, ethernet> at device 5.0 (no driver attached)
fxp0: <Intel 82550 Pro/100 Ethernet> port 0xdf00-0xdf3f mem 0xfeac0000-0xfeadffff,0xfeaee000-0xfeaeefff irq 21 at device 9.0 on pci2
fxp0: Ethernet address 00:02:b3:c8:65:8f
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp1: <Intel 82559 Pro/100 Ethernet> port 0xde80-0xdebf mem 0xfe900000-0xfe9fffff,0xfeaed000-0xfeaedfff irq 22 at device 10.0 on pci2
fxp1: Ethernet address 00:d0:b7:51:c6:bc
miibus1: <MII bus> on fxp1
inphy1: <i82555 10/100 media interface> on miibus1
inphy1:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pci2: <display, VGA> at device 12.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH5 UDMA100 controller> port 0xfc00-0xfc0f,0-0x3,0-0x7,0-0x3,0-0x7 at device 31.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata0: [MPSAFE]
ata1: at 0x170 irq 15 on atapci0
ata1: [MPSAFE]
atapci1: <Intel ICH5 SATA150 controller> port 0xef90-0xef9f,0xefa8-0xefab,0xefa0-0xefa7,0xefac-0xefaf,0xefe0-0xefe7 irq 18 at device 31.2 on pci0
atapci1: [MPSAFE]
ata2: at 0xefe0 on atapci1
ata2: [MPSAFE]
ata3: at 0xefa0 on atapci1
ata3: [MPSAFE]
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
pci0: <multimedia, audio> at device 31.5 (no driver attached)
acpi_button0: <Power Button> on acpi0
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 ROM> at iomem 0xc0000-0xc7fff on isa0
fdc0: ready for input in output
fdc0: cmd 3 failed at out byte 1 of 3
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
Timecounters tick every 1.000 msec
IPv6 packet filtering initialized, default to accept, logging limited to 100 packets/entry
ipfw2 initialized, divert enabled, rule-based forwarding enabled, default to accept, logging unlimited
IP Filter: v3.4.31 initialized.  Default = pass all, Logging = enabled
GEOM: create disk ad0 dp=0xc46aa360
ad0: 117800MB <IC35L120AVVA07-0> [239340/16/63] at ata0-master UDMA100
GEOM: create disk ad2 dp=0xc46aa060
ad2: 117800MB <IC35L120AVVA07-0> [239340/16/63] at ata1-master UDMA100
GEOM: create disk ad4 dp=0xc46f6860
ad4: 114473MB <ST3120022A> [232581/16/63] at ata2-master UDMA100
GEOM: create disk ad6 dp=0xc46abc60
ad6: 114473MB <ST3120022A> [232581/16/63] at ata3-master UDMA100
ar0: WARNING - mirror lost
GEOM: create disk ar0 dp=0xc46f71e0
ar0: 114473MB <ATA RAID1 array> [14593/255/63] status: DEGRADED subdisks:
 disk0 DOWN no device found for this disk
 disk1 READY on ad6 at ata3-master
SMP: AP CPU #1 Launched!
Mounting root from ufs:/dev/ad0s1a
WARNING: / was not properly dismounted