# %M - the kernel major number for the device
# %m - the kernel minor number for the device
# %b - the bus id for the device
# %M - the kernel major number for the device
# %m - the kernel minor number for the device
# %b - the bus id for the device
# the PROGRAM field for the obvious reason.)
# %D - use the devfs style disk name for this device.
# For partitions, this will result in 'part%n'
# the PROGRAM field for the obvious reason.)
# %D - use the devfs style disk name for this device.
# For partitions, this will result in 'part%n'