I just did a install last month on my new Seagate.
System s451 mobo 486DX33 20MB/4GB HD.

In order to boot with NetBSD the root partition
needs to be in the first 1024 cylinders . 
(cyl 0-1023)

Forget "DiscWizard" for this project.
Use CHS.
Set the BIOS to 1024  16 63 (473MB)
In dos run fdisk and delete all the partitions
and then make one primary dos and one extended
to be your root partition under NetBSD.
boot the installer and select the entire extended 
partition as root. 

Now the boot selector should work.

Here is the disklabel from my 4GB Seagate

leopard#  disklabel /dev/wd0
# /dev/wd0d:
type: ST506
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 15
sectors/cylinder: 945
cylinders: 8894
total sectors: 8404830

8 partitions:
#        size   offset    fstype   [fsize bsize   cpg]
  a:    99225   868455      4.2BSD     1024  8192    16   # (Cyl.  919 -
1023)
  b:   241920   967680        swap                        # (Cyl. 1024 -
1279)
  c:  7536375   868455      unused        0     0         # (Cyl.  919 -
8893)
  d:  8404830        0      unused        0     0         # (Cyl.    0 -
8893)
  e:   967680  1209600      4.2BSD     1024  8192    16   # (Cyl. 1280 -
2303)
  f:  5259870  2177280      4.2BSD     1024  8192    16   # (Cyl. 2304 -
7869)
  g:   967680  7437150      4.2BSD     1024  8192    16   # (Cyl. 7870 -
8893)
  h:   868455       63       MSDOS                        # (Cyl.    0*-
919)

h: dos  is 424MB 
a: root is 48MB on my setup 
leopard# df

Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
/dev/wd0a       47971    13923    31649    31%    /
/dev/wd0f     2543609    74692  2341736     3%    /usr
/dev/wd0e      467951    26690   417863     6%    /home
/dev/wd0g      467951        6   444547     0%    /tmp
kernfs              1        1        0   100%    /kern


On Sun, Jul 5, 1998 8:25 PM, Space Case <mailto:wormey@eskimo.com> wrote:
> I have this Gateway FPOS that is frustrating me to no end.  I can't get
it
> to properly interact with the disk I bought for NetBSD.  Here's what I
have:
> 
> Gateway 486DX/33 with Phoenix 486 ROM BIOS Vers 0.10 G21-2
> Seagate ST32122A/U 2.1GB (Ultra DMA [EIDE])
> 
> I had set this disk up (only HD on the system) with Seagate's DiscWizard
> Disk Manager program.  Everything went swimmingly until the usr partition
> got to ~500MB used, then it started acting like it was having problems
> reading the disk (couple of head seeks, sit for 10 secs, repeat forever).
> So I thought I'd try a surface scan to verify the disk, and maybe some
> different BIOS geometries.  This is what I tried...
> 
> Boot DOS from floppy
> Escape to BIOS to set geometry.  I've tried:
>   User mode, 1023 cyl, 64 head, 63 sec
>   Auto mode, 2046 cyl, 32 head, 63 sec
>   User mode, 4092 cyl, 16 head, 63 sec
> Exit, reboot to DOS from floppy
> fdisk /mbr
> fdisk, delete exisiting partition, create new one
> Reboot to DOS from floppy
> format /s c:
> copy pkunzip.exe and a zipped file to c:
> change to c: drive and try to unzip the file
> 
> In all cases, I'd get read errors upon trying to execute pkunzip or when
> pkunzip was trying to read the file.  In no case was I able to boot from
> the HD, all I got was read errors.
> 
> Am I doing something wrong, or is it that I have a FPOS box which needs
> a motherboard transplant?
> 
> Thanks,
> ~Steve
> 
> -- 
> Steve Allen - wormey@eskimo.com   http://www.eskimo.com/~wormey/   ICQ
6709819
> 
> Faith is the quality that enables you to eat blackberry jam on a picnic
> without looking to see whether the seeds move.
> 
> Contrary to popular belief, Unix is user friendly.  
> It just happens to be selective about who it makes friends with.
> 	-Kyle Hearn  <kyle@intex.net>
> 
> How long a minute is depends on which side of the bathroom door you're
> on.
> 
> 
> 

 
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