virtio_pci0: host features: 0x79bf8064 <EventIdx,RingIndirect,AnyLayout,NotifyOnEmpty,SetMacAddress,GuestAnnounce,RxModeExtra,VLanFilter,RxMode,ControlVq,Status,MrgRxBuf,TxAllGSO,MacAddress,DynOffload>
virtio_pci0: negotiated features: 0x198f8020 <RingIndirect,AnyLayout,NotifyOnEmpty,SetMacAddress,VLanFilter,RxMode,ControlVq,Status,MrgRxBuf,MacAddress>
virtio_pci0: using 3 MSI-X vectors
vtnet0: MAC address: 52:54:00:12:34:56
virtio_pci1: <VirtIO PCI Block adapter> port 0xc000-0xc07f mem 0xfe004000-0xfe007fff,0xfebd2000-0xfebd2fff irq 11 at device 4.0 on pci0
vtblk0: <VirtIO Block Adapter> on virtio_pci1
virtio_pci1: host features: 0x79007e54 <EventIdx,RingIndirect,AnyLayout,NotifyOnEmpty,WriteZeroes,Discard,MultiQueue,ConfigWCE,Topology,FlushCommand,BlockSize,DiskGeometry,MaxNumSegs>
virtio_pci1: negotiated features: 0x10001a54 <RingIndirect,MultiQueue,ConfigWCE,FlushCommand,BlockSize,DiskGeometry,MaxNumSegs>
virtio_pci1: using 6 MSI-X vectors
vtblk0: Virtio: ncylinders at legacy maximum (16383), recalculating to 62415
vtblk0: Block size: 512
vtblk0: 30720MB (62914560 512 byte sectors: 16H 63S/T 16383C)
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
interrupt uses mplock: psm0
psm0: model IntelliMouse Explorer, device ID 4
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A, console
ACPI: Enabled 2 GPEs in block 00 to 0F
rdrand0: No RdRand support.
orm0: <ISA Option ROM> at iomem 0xe8000-0xeffff on isa1
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa1
sio2: can't drain, serial port might not exist, disabling
hpt27xx: no controller detected.
CAM: Configuring 2 busses
CAM: finished configuring all busses
cd0 at ata1 bus 0 target 0 lun 0
cd0: <QEMU QEMU DVD-ROM 2.5+> Removable CD-ROM SCSI-0 device 
cd0: 16.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present
Mounting root from hammer2:vbd0s1d
hammer2_mount: root devstr="vbd0s1d"
hammer2_mount: device="vbd0s1d" label="ROOT" rdonly=1
hammer2_ondisk: "/dev/vbd0s1d" zone=1 id=0 offset=0x0000000000000000 size=0x000000063f000000
hammer2_mount: hmp=0xfffff8008fac0000 pmp=0xfffff80090260000
DMA space used: 13580k, remaining available: 131072k
Mounting devfs
hammer2_mount: "vbd0s1d": no recovery needed
hammer2: enable read/write
HAMMER2: VOLDATA DUMP
HAMMER2: INITIATE SPANs
swap low/high-water marks set to 41940/62910
DFH: ########## DF-2426 control BEGIN ##########
DFH: ==== DF-2426 control: block_size = 512 ====
DFH: ---- XPT_CALC_GEOMETRY block_size=512 volume_size=204800 (expecting sane geometry) ----
DFH: RESULT amd_action returned, xpt_done=1 status=0x01 heads=64 secs=32 cylinders=100
DFH:   PASS: nonzero block_size computes 64/32/100 geometry, CAM_REQ_CMP
DFH: ########## DF-2426 control END: 0 check(s) failed ##########
DFH: ==== DF-2426 trigger: block_size = 0 ====
DFH: calling amd_action: Fatal trap 18 imminent on the verbatim kernel (amd.c:683, (1024L*1024L)/ccg->block_size with block_size=0)
DFH: ---- XPT_CALC_GEOMETRY block_size=0 volume_size=204800 (expecting DIVIDE BY ZERO at amd.c:683) ----
DFH: RESULT amd_action returned, xpt_done=1 status=0x04 heads=0 secs=0 cylinders=0
DFH:   PASS: FIXED kernel: no trap; amd_action rejected block_size=0 with CAM_REQ_CMP_ERR
DFH: ==== DF-2426 trigger2: block_size = 2 MiB (passes the XPT garbage filter cam_xpt.c:3062; inner division yields 0) ====
DFH: calling amd_action: Fatal trap 18 imminent on the verbatim kernel (amd.c:683, volume_size/((1024L*1024L)/2097152) == volume_size/0)
DFH: ---- XPT_CALC_GEOMETRY block_size=2097152 volume_size=204800 (expecting inner div -> 0, OUTER DIVIDE BY ZERO at amd.c:683) ----
DFH: RESULT amd_action returned, xpt_done=1 status=0x04 heads=0 secs=0 cylinders=0
DFH:   PASS: FIXED kernel: no trap; amd_action rejected the 2 MiB block_size with CAM_REQ_CMP_ERR