Can't get this to work. I get:

bash-2.03# mount -r /dev/wd0d /mnt
mount_ffs: /dev/wd0d on /mnt: incorrect super block
bash-2.03#

Appended are disklabels and fdisk for each O/S view.

Interestingly, FreeBSD can mount the NetBSD disk fine..

I notice that FreeBSD did really dumb geometry calcs. But the offsets into
the 512-byte sector count seem to add up ok to me.

I've amazed myself by almost wishing NetBSD had slice-notation!

Any clues greatfully received.

-George

In order, FreeBSD disklabel, NetBSD disklabel, FreeBSD fdisk, NetBSD fdisk.

bash-2.03# cat /var/tmp/disklabel.freebsd 
# /dev/rwd0c:
type: ESDI
disk: wd0s3
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 254
sectors/unit: 4080510
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0 

8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  a:  3481600        0    4.2BSD     1024  8192    16   # (Cyl.    0 - 216*)
  b:   598910  3481600      swap                        # (Cyl.  216*- 253*)
  c:  4080510        0    unused        0     0         # (Cyl.    0 - 253)
bash-2.03# 

bash-2.03# disklabel -r wd0
# /dev/rwd0d:
type: unknown
disk: mydisk
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 15
sectors/cylinder: 945
cylinders: 13328
total sectors: 12594960
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0 

8 partitions:
#        size   offset     fstype   [fsize bsize   cpg]
  a:  1850310 10217340     4.2BSD     1024  8192    16   # (Cyl. 10812 - 12769)
  b:   527310 12067650       swap                        # (Cyl. 12770 - 13327)
  c:  2377620 10217340     unused        0     0         # (Cyl. 10812 - 13327)
  d:  3481600  6136830     4.2BSD     1024  8192    16   # (Cyl. 6494 - 10178*)
bash-2.03# 

bash-2.03# cat /var/tmp/fdisk.freebsd 
******* Working on device /dev/rwd0 *******
parameters extracted from in-core disklabel are:
cylinders=12594960 heads=1 sectors/track=1 (1 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=12594960 heads=1 sectors/track=1 (1 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 6,(Primary 'big' DOS (> 32MB))
    start 63, size 2040192 (996 Meg), flag 0
        beg: cyl 0/ sector 1/ head 1;
        end: cyl 127/ sector 1/ head 0
The data for partition 2 is:
sysid 5,(Extended DOS)
    start 2040255, size 4096575 (2000 Meg), flag 0
        beg: cyl 127/ sector 1/ head 0;
        end: cyl 382/ sector 1/ head 0
The data for partition 3 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
    start 6136830, size 4080510 (1992 Meg), flag 80 (active)
        beg: cyl 382/ sector 1/ head 0;
        end: cyl 636/ sector 1/ head 0
The data for partition 4 is:
sysid 169,(NetBSD)
    start 10217340, size 2377620 (1160 Meg), flag 0
        beg: cyl 636/ sector 1/ head 0;
        end: cyl 784/ sector 1/ head 0
bash-2.03# 


bash-2.03# fdisk wd0
NetBSD disklabel disk geometry:
cylinders: 13328 heads: 15 sectors/track: 63 (945 sectors/cylinder)

BIOS disk geometry:
cylinders: 784 heads: 255 sectors/track: 63 (16065 sectors/cylinder)

Partition table:
0: sysid 6 (Primary 'big' DOS, 16-bit FAT (> 32MB))
    start 63, size 2040192 (996 MB), flag 0x0
        beg: cylinder    0, head   1, sector  1
        end: cylinder  127, head   0, sector  1
1: sysid 5 (Extended partition)
    start 2040255, size 4096575 (2000 MB), flag 0x0
        beg: cylinder  127, head   0, sector  1
        end: cylinder  382, head   0, sector  1
2: sysid 165 (FreeBSD or 386BSD or old NetBSD)
    start 6136830, size 4080510 (1992 MB), flag 0x0
        beg: cylinder  382, head   0, sector  1
        end: cylinder  636, head   0, sector  1
3: sysid 169 (NetBSD)
    start 10217340, size 2377620 (1160 MB), flag 0x80
        beg: cylinder  636, head   0, sector  1
        end: cylinder  784, head   0, sector  1
bash-2.03#