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Tools that manage md devices can be found at

   http://www..kernel.org/pub/linux/daemons/raid/....

You can boot (if you selected boot support in the configuration) with your md

device with the following kernel command lines:

for old raid arrays without persistent superblocks:

  md=,,,,dev0,dev1,...,devn

for raid arrays with persistant superblocks

  md=,dev0,dev1,...,devn

md device no. = the number of the md device ...

              1 md1,

              2 md2,

              3 md3,

              4 md4

raid level = -1 linear mode

              other modes are only supported with persistant super blocks

chunk size factor = (raid-0 and raid-1 only)

              Set  the chunk size as 4k << n.

fault level = totally ignored

dev0-devn: e.g. /dev/hda1,/dev/hdc1,/dev/sda1,/dev/sdb1

A possible loadlin line (Harald Hoyer )  looks like this:

e:\loadlin\loadlin e:\zimage root=/dev/md0 md=0,0,4,0,/dev/hdb2,/dev/hdc3 ro