# They provide the following subsitutions:
# %n - the "kernel number" of the device.
# for example, 'sda3' has a "kernel number" of '3'
# %M - the kernel major number for the device
# %m - the kernel minor number for the device
# %b - the bus id for the device
# They provide the following subsitutions:
# %n - the "kernel number" of the device.
# for example, 'sda3' has a "kernel number" of '3'
# %M - the kernel major number for the device
# %m - the kernel minor number for the device
# %b - the bus id for the device