Mandrake 8.1 Resize partition problems

Hi all:

I have Mandrake 8.1 installed on 2 HDs (a 4 gig and a 9 gig).
sda and sdb respectively.

My sdb is divided into:
/var/ftp - 163 Meg
/var/www - 511 Meg
/home - 4 Gig
none - 3.8 Gig


I need to add the additional 3.8 gig to /home.

I go into Harddrake and tell it to unmount /home first (as it doesn't want to add to the partition without doing this) and it gives an error:
error unmounting /home: Device or resource busy.

No one is on the machine. I have even rebooted and tried to do it from there.

It may be that my boot sequence does not allow Root to login, but has to log in after boot (and someone else logs in).

a) Is there a way for root to log in on boot so that I can try this (I am using gnome)?
b) Why can't I unmount /home????

TIA

 

Well.. Found my very old 4 gig DAT Tape drive. Will just back up the partition and redo it!


Thanks anyway!