udevmonitor will print the received events for:
UDEV the event which udev sends out after rule processing
UEVENT the kernel uevent

UEVENT[1196305882.260060] add      /class/scsi_host/host21 (scsi_host)
ACTION=add
DEVPATH=/class/scsi_host/host21
SUBSYSTEM=scsi_host
SEQNUM=3980
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21

UDEV  [1196305882.262057] add      /class/scsi_host/host21 (scsi_host)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/scsi_host/host21
SUBSYSTEM=scsi_host
SEQNUM=3980
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21
UDEVD_EVENT=1

UEVENT[1196305883.269844] add      /devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0 (scsi)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
SUBSYSTEM=scsi
SEQNUM=3981
PHYSDEVBUS=scsi
MODALIAS=scsi:t-0x0e

UEVENT[1196305883.269886] add      /class/scsi_disk/21:0:0:0 (scsi_disk)
ACTION=add
DEVPATH=/class/scsi_disk/21:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=3982
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd

UDEV  [1196305886.316249] add      /devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
SUBSYSTEM=scsi
SEQNUM=3981
PHYSDEVBUS=scsi
MODALIAS=scsi:t-0x0e
UDEVD_EVENT=1

UDEV  [1196305886.318688] add      /class/scsi_disk/21:0:0:0 (scsi_disk)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/scsi_disk/21:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=3982
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
UDEVD_EVENT=1

UEVENT[1196305887.458821] add      /block/sde (block)
ACTION=add
DEVPATH=/block/sde
SUBSYSTEM=block
SEQNUM=3983
MINOR=64
MAJOR=8
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd

UEVENT[1196305887.458848] add      /block/sde/sde1 (block)
ACTION=add
DEVPATH=/block/sde/sde1
SUBSYSTEM=block
SEQNUM=3984
MINOR=65
MAJOR=8
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd

UEVENT[1196305887.458863] add      /block/sde/sde2 (block)
ACTION=add
DEVPATH=/block/sde/sde2
SUBSYSTEM=block
SEQNUM=3985
MINOR=66
MAJOR=8
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd

UEVENT[1196305887.460776] add      /class/scsi_device/21:0:0:0 (scsi_device)
ACTION=add
DEVPATH=/class/scsi_device/21:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=3986
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd

UEVENT[1196305887.460809] add      /class/scsi_generic/sg6 (scsi_generic)
ACTION=add
DEVPATH=/class/scsi_generic/sg6
SUBSYSTEM=scsi_generic
SEQNUM=3987
MAJOR=21
MINOR=6
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd

UDEV  [1196305887.468877] add      /class/scsi_device/21:0:0:0 (scsi_device)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/scsi_device/21:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=3986
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
UDEVD_EVENT=1

UDEV  [1196305887.471050] add      /class/scsi_generic/sg6 (scsi_generic)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/scsi_generic/sg6
SUBSYSTEM=scsi_generic
SEQNUM=3987
MAJOR=21
MINOR=6
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
UDEVD_EVENT=1
DEVNAME=/dev/sg6

UDEV  [1196305887.615355] add      /block/sde (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/block/sde
SUBSYSTEM=block
SEQNUM=3983
MINOR=64
MAJOR=8
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
UDEVD_EVENT=1
DEVTYPE=disk
ID_SERIAL=000a270002a92b54:0:0
ID_BUS=ieee1394
ID_PATH=pci-0000:02:03.0-ieee1394-0x000a270002a92b54:0:0
DEVNAME=/dev/sde
DEVLINKS=/dev/disk/by-id/ieee1394-000a270002a92b54:0:0 /dev/disk/by-path/pci-0000:02:03.0-ieee1394-0x000a270002a92b54:0:0

UDEV  [1196305887.769095] add      /block/sde/sde2 (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/block/sde/sde2
SUBSYSTEM=block
SEQNUM=3985
MINOR=66
MAJOR=8
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
UDEVD_EVENT=1
DEVTYPE=partition
ID_SERIAL=000a270002a92b54:0:0
ID_BUS=ieee1394
ID_PATH=pci-0000:02:03.0-ieee1394-0x000a270002a92b54:0:0
ID_FS_USAGE=filesystem
ID_FS_TYPE=vfat
ID_FS_VERSION=FAT32
ID_FS_UUID=640B-65BE
ID_FS_UUID_ENC=640B-65BE
ID_FS_LABEL=GOODMAN'S I
ID_FS_LABEL_ENC=GOODMAN\x27S\x20I
ID_FS_LABEL_SAFE=GOODMAN_S_I
DEVNAME=/dev/sde2
DEVLINKS=/dev/disk/by-id/ieee1394-000a270002a92b54:0:0-part2 /dev/disk/by-path/pci-0000:02:03.0-ieee1394-0x000a270002a92b54:0:0-part2 /dev/disk/by-uuid/640B-65BE /dev/disk/by-label/GOODMAN\x27S\x20I

UDEV  [1196305887.837521] add      /block/sde/sde1 (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/block/sde/sde1
SUBSYSTEM=block
SEQNUM=3984
MINOR=65
MAJOR=8
PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:03.0/fw-host0/000a270002a92b54/000a270002a92b54-0/host21/target21:0:0/21:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
UDEVD_EVENT=1
DEV