bhyve fail

sudo bhyveload -m 768 -M 8192 -d ./diskdev guest0 && sudo bhyve -c 1 -a -A -m 768 -M 8192 -I -H -g 0 -s 0:0,hostbridge -s 1:0,virtio-blk,diskdev -S 31,uart,stdio guest0

Booting...
GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2013 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 is a registered trademark of The FreeBSD Foundation.
FreeBSD 10.0-CURRENT #0 r246446: Thu Feb  7 02:36:17 UTC 2013    [email protected]:/usr/obj/usr/src/sys/GENERIC amd64FreeBSD clang version 3.2 (tags/RELEASE_32/final 170710) 20121221
WARNING: WITNESS option enabled, expect reduced performance.
CPU: Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz (3399.74-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x306a9  Family = 0x6  Model = 0x3a  Stepping = 9
  Features=0x8fa3ab7f<FPU,VME,DE,PSE,TSC,MSR,PAE,CX8,APIC,SEP,PGE,CMOV,PAT,PSE36,DTS,MMX,FXSR,SSE,SSE2,SS,PBE>
  Features2=0xe3bae257<SSE3,PCLMULQDQ,DTES64,DS_CPL,SMX,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,F16C,RDRAND,HV>
  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant
real memory  = 12884901888 (12288 MB)
avail memory = 8932638720 (8518 MB)
Event timer "LAPIC" quality 400
ACPI APIC Table: <BHYVE  BVMADT  >
random device not loaded; using insecure entropy
ioapic0: Changing APIC ID to 1
ioapic0 <Version 1.1> irqs 0-16 on motherboard
module_register_init: MOD_LOAD (vesa, 0xffffffff80c24d10, 0) error 19
kbd0 at kbdmux0
ctl: CAM Target Layer loaded
acpi0: <BHYVE BVXSDT> on motherboard
atrtc0: <AT realtime clock> port 0x70-0x71,0x72-0x77 irq 8 on acpi0
Event timer "RTC" frequency 32768 Hz quality 0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <32-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib0: no PRT entry for 0.31.INTA
virtio_pci0: <VirtIO PCI Block adapter> port 0x2000-0x203f mem 0x30000000-0x30001fff at device 1.0 on pci0
vtblk0: <VirtIO Block Adapter> on virtio_pci0
virtio_pci0: host features: 0x10000004 <RingIndirect,MaxNumSegs>
virtio_pci0: negotiated features: 0x10000004 <RingIndirect,MaxNumSegs>
virtio_pci0: exhausted all interrupt allocation attempts
vtblk0: cannot setup virtqueue interrupt
device_attach: vtblk0 attach returned 6
uart2: <16550 or compatible> port 0x3f8-0x3ff irq 4 at device 31.0 on pci0
uart2: console (9600,n,8,1)
Timecounters tick every 10.000 msec
Timecounter "TSC-low" frequency 1699869916 Hz quality 1000
WARNING: WITNESS option enabled, expect reduced performance.
Trying to mount root from ufs:/dev/vtbd0s1a [rw]...
mountroot: waiting for device /dev/vtbd0s1a ...
Mounting from ufs:/dev/vtbd0s1a failed with error 19.