Problem adding new disk to existing installation (FreeBSD 4.8)

[Joel V]

Hello all.
 
My problem seemed to be a little too weird and uncommon to post at
freebsd-questions.
 
Background information: P4 2.4 / Intel D845PESV / 512 DDR333 / 120GB WD
primary master / 60GB WD secondary master
 
I've succesfully installed FreeBSD 4.8 on primary master. However, when
I try to add the secondary master to the existing installation via
sysinstall, things don't go so smoothly.
I can create a new slice in Fdisk without problems, but Disklabel just
stops after giving me the error about mounting. In another getty I see
this:
 
DEBUG: MakeDev: Unknown major/minor for devtype -

I changed the ata100 cable. I checked the disk with WD's Data Lifeguard.
The disk also worked fine in a Win2k workstation. All the BIOS settings
are on auto. Someone suggested on doing "cd /dev/ && ./MAKEDEV all", but
this didn't help. Also, FreeBSD detects both disks without problems:
 
ad0: 114473MB <WDC WD1200JB-00CRA1> [232581/16/63] at ata0-master
UDMA100
ad2: 57241MB <WDC WD600JB-00CRA1> [116301/16/63] at ata1-master UDMA100

Anyone seen something like this before? I found surprisingly little info
on google.
 
 
 
Cheers, 
Joel