raidtools install error

[Stephen O'Mohany]

Hi,
      I would be very grateful if someone could shed some light on the
following error
I am installing raidtools-0.50 on kernel 2.4_test. The configure works fine
but when I run "make" I exit with the following error.

/usr/src/linux/include/linux/raid/md_k.h:59: # error MD doesn't handle
bigger hdev yet