> I'm guessing that your machine is confused about the partition type
> being apple ufs or not.  Useful debugging information would be pdisk
> output, the ofw command you used to boot the machine, dmesg/console
> output, your /etc/fstab and what partition you think it is using for
> root.
> 
> A version of pdisk for 1.6 can be found at:
> ftp://ftp.netbsd.org/pub/NetBSD/arch/macppc/netbsd-pdisk/netbsd-pdisk.macppc-1-6

Here is the pdisk output:
Partition map (with 512 byte blocks) on '/dev/rwd0c'
 #:                type name          length   base     ( size )
 1: Apple_partition_map Apple             63 @ 1
 2:           Apple_HFS boot NetBSD     4096 @ 64       (  2.0M)
 3:           Apple_HFS Mac OS X    19912160 @ 4160     (  9.5G)
 4:     Apple_UNIX_SVR2 root         3072000 @ 19916320 (  1.5G) S0 RUFS k0  /
 5:     Apple_UNIX_SVR2 swap         2048000 @ 22988320 (1000.0M) S1  SFS k0  (swap)
 6:     Apple_UNIX_SVR2 home        53103840 @ 25036320 ( 25.3G) S2  UFS k0
 
Device block size=512, Number of Blocks=78140160 (37.3G)
DeviceType=0x0, DeviceId=0x0

The ofw command to boot:
boot hd:2,\ofwboot.xcf hd:4,/netbsd.1

/etc/fstab:
/dev/wd0a       /               ffs     rw      1 1
/dev/wd0b       none            swap    sw      0 0
/dev/wd0g       /home           ffs     rw      1 2
/dev/cd0a       /mnt/cdrom      cd9660  ro      0 0

-- 
Jim Lemke   jim@TheLemkes.ca   Orillia, Ontario
1992 ST1100, STOC #3750;   FWD# M:245401 H:246889
"Time is the fire in which we burn." Dr. Tolian Soran