user@nas:~$ sudo udevinfo -a -p /sys/block/sdb

Udevinfo starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

looking at device '/block/sdb':
KERNEL=="sdb"
SUBSYSTEM=="block"
DRIVER==""
ATTR{dev}=="8:16"
ATTR{range}=="16"
ATTR{removable}=="0"
ATTR{size}=="976773168"
ATTR{stat}==" 4801543 117294796 976769560 356976996 410566 5522918 47467888 59108440 0 55425312 416084900"
ATTR{capability}=="12"

looking at parent device '/devices/pci0000:00/0000:00:14.2/usb5/5-4/5-4:1.0/host2/target2:0:0/2:0:0:0':
KERNELS=="2:0:0:0"
SUBSYSTEMS=="scsi"
DRIVERS=="sd"
ATTRS{device_blocked}=="0"
ATTRS{type}=="0"
ATTRS{scsi_level}=="3"
ATTRS{vendor}=="ST350083"
ATTRS{model}=="0AS "
ATTRS{rev}==" "
ATTRS{state}=="running"
ATTRS{timeout}=="30"
ATTRS{iocounterbits}=="32"
ATTRS{iorequest_cnt}=="0x4f87d4"
ATTRS{iodone_cnt}=="0x4f87d4"
ATTRS{ioerr_cnt}=="0x0"
ATTRS{modalias}=="scsi:t-0x00"
ATTRS{evt_media_change}=="0"
ATTRS{queue_depth}=="1"
ATTRS{queue_type}=="none"
ATTRS{max_sectors}=="240"

looking at parent device '/devices/pci0000:00/0000:00:14.2/usb5/5-4/5-4:1.0/host2/target2:0:0':
KERNELS=="target2:0:0"
SUBSYSTEMS==""
DRIVERS==""

looking at parent device '/devices/pci0000:00/0000:00:14.2/usb5/5-4/5-4:1.0/host2':
KERNELS=="host2"
SUBSYSTEMS==""
DRIVERS==""

looking at parent device '/devices/pci0000:00/0000:00:14.2/usb5/5-4/5-4:1.0':
KERNELS=="5-4:1.0"
SUBSYSTEMS=="usb"
DRIVERS=="usb-storage"
ATTRS{bInterfaceNumber}=="00"
ATTRS{bAlternateSetting}==" 0"
ATTRS{bNumEndpoints}=="02"
ATTRS{bInterfaceClass}=="08"
ATTRS{bInterfaceSubClass}=="06"
ATTRS{bInterfaceProtocol}=="50"
ATTRS{modalias}=="usb:v152Dp2336d0100dc00dsc00dp00ic08isc06ip50"
ATTRS{interface}=="Bulk-In, Bulk-Out Interface"

looking at parent device '/devices/pci0000:00/0000:00:14.2/usb5/5-4':
KERNELS=="5-4"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{dev}=="189:513"
ATTRS{configuration}=="USB Mass Storage"
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="1"
ATTRS{bmAttributes}=="c0"
ATTRS{bMaxPower}==" 2mA"
ATTRS{urbnum}=="138329697"
ATTRS{idVendor}=="152d"
ATTRS{idProduct}=="2336"
ATTRS{bcdDevice}=="0100"
ATTRS{bDeviceClass}=="00"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{bNumConfigurations}=="1"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{speed}=="480"
ATTRS{busnum}=="5"
ATTRS{devnum}=="2"
ATTRS{version}==" 2.00"
ATTRS{maxchild}=="0"
ATTRS{quirks}=="0x0"
ATTRS{authorized}=="1"
ATTRS{manufacturer}=="JMicron"
ATTRS{product}=="MEDION HDDrive2GO"
ATTRS{serial}=="883500830A88"

looking at parent device '/devices/pci0000:00/0000:00:14.2/usb5':
KERNELS=="usb5"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{dev}=="189:512"
ATTRS{configuration}==""
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="1"
ATTRS{bmAttributes}=="e0"
ATTRS{bMaxPower}==" 0mA"
ATTRS{urbnum}=="62"
ATTRS{idVendor}=="0000"
ATTRS{idProduct}=="0000"
ATTRS{bcdDevice}=="0206"
ATTRS{bDeviceClass}=="09"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="01"
ATTRS{bNumConfigurations}=="1"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{speed}=="480"
ATTRS{busnum}=="5"
ATTRS{devnum}=="1"
ATTRS{version}==" 2.00"
ATTRS{maxchild}=="5"
ATTRS{quirks}=="0x0"
ATTRS{authorized}=="1"
ATTRS{manufacturer}=="Linux 2.6.24-19-generic ehci_hcd"
ATTRS{product}=="EHCI Host Controller"
ATTRS{serial}=="0000:00:14.2"
ATTRS{authorized_default}=="1"

looking at parent device '/devices/pci0000:00/0000:00:14.2':
KERNELS=="0000:00:14.2"
SUBSYSTEMS=="pci"
DRIVERS=="ehci_hcd"
ATTRS{vendor}=="0x1033"
ATTRS{device}=="0x00e0"
ATTRS{subsystem_vendor}=="0x9004"
ATTRS{subsystem_device}=="0x00e0"
ATTRS{class}=="0x0c0320"
ATTRS{irq}=="12"
ATTRS{local_cpus}=="ff"
ATTRS{modalias}=="pci:v00001033d000000E0sv00009004sd000000E0bc0Csc03i20"
ATTRS{enable}=="1"
ATTRS{broken_parity_status}=="0"
ATTRS{msi_bus}==""

looking at parent device '/devices/pci0000:00':
KERNELS=="pci0000:00"
SUBSYSTEMS==""
DRIVERS==""