Disk Management (GHOST)

Please can someone help with this problem.

I have a W2k Server SP4. I want to s/ware mirror my hdd,
So I went out and got 2 of the exact same hdd 160gb.

This was the theory, (Ghost old hdd to my new hdd and
then mirror my new hdd to the other new one) The problem
im getting is after I have ghosted the old hdd to the new
one. I test that it boots fine and it does. I then put
in the other hdd go into Disk Management and could see
both hdd (of course one is unlocated no partion) In order
for mirror to work you need both disks to go to Dynamic
So I enable the main disk and get the following
error "Cannot proceed with the upgrade, at least one disk
does not have 1mb of unpationed space at the end of the
disk which is needed for upgrade" When I ghosted it, I
never put the whole drive I even left out 30 megs.

The second drive does go to Dynamic fine. Please help
with this problem, I have looked at KB 267146

Thanks