RAID1 Question....

[Anthony Landreneau <landrena@idsno.com>]

Greetings,
	I have a machine that I would like to institue RAID1 on. Two 4 Gig drives,
the primary is partitioned with a 
/dev/hda1	/
/dev/hda2	swap
/dev/hda3	/var
/dev/hda4	/usr

I have the secondary drive partitioned the same way. I would like to mirror
the partitions on the primary drive to those on the secondary drive. I have
made an mdtab file, 

# mdtab entry for /dev/md3
/dev/md3        raid1,8k,1,e46c7dcc     /dev/hda3 /dev/hdb3

but can't seem to get it working. Anyone got this kind of stuff running?
Any help would be appricated.

Anthony