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Old 29th November 2010
J65nko J65nko is offline
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Join Date: May 2008
Location: Budel - the Netherlands
Posts: 3,603
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CAVEAT: I don't have a running NetBSD system so be careful.

If I would want to dump my OpenBSD system on wd0a
Code:
# disklabel wd0
# /dev/rwd0c:
type: ESDI
disk: ESDI/IDE disk
label: WDC WD3200AAKS-2
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 38913
total sectors: 625142448
rpm: 3600
interleave: 1
boundstart: 63
boundend: 81915435
drivedata: 0 

16 partitions:
#                size           offset  fstype [fsize bsize  cpg]
  a:         81787372               63  4.2BSD   2048 16384    1 # /
  b:           128000         81787435    swap                   
  c:        625142448                0  unused
Just like your NetBSD system, my OBSD is in one single filesystem/label : wd0a

Code:
# ls -l /
drwxr-xr-x   2 root    wheel       512 Apr  4  2010 altroot
drwxr-xr-x   2 root    wheel      1024 Apr  4  2010 bin
-r-xr-xr-x   1 root    wheel     42612 Apr  5  2010 boot
-rw-r--r--   1 root    wheel   8635425 Apr  5  2010 bsd
-rw-r--r--   1 root    wheel   8658947 Apr  5  2010 bsd.mp
-rw-r--r--   1 root    wheel   7318475 Apr  5  2010 bsd.rd
drwxr-xr-x   3 root    wheel     23552 Nov 29 15:58 dev
drwxr-xr-x  28 root    wheel      2560 Nov 29 15:58 etc
drwxr-xr-x   7 root    wheel       512 Apr  5  2010 home
drwxr-xr-x   2 root    wheel       512 Apr  4  2010 mnt
drwx------   6 root    wheel      1024 Jun 20 18:42 root
drwxr-xr-x   2 root    wheel      1536 Apr  4  2010 sbin
drwxrwxrwt   6 root    wheel       512 Nov 29 15:58 tmp
drwxr-xr-x  17 root    wheel       512 Mar 26  2010 usr
drwxr-xr-x  24 root    wheel       512 May 11  2010 var

Mount your USB 120 GB disk on /mnt. ( I don't know the NetBSD commands to do so ...)

Now backup all directories to files using the -a flag, except /mnt.
Reason: you don't want to backup your backup in progress!
The autosize -a flag is needed to backup to file.

Code:
dump -0af /mnt/bin.dump /bin
dump -0af /mnt/boot.dump /boot
dump -0af /mnt/dev.dump /dev
....
dump -0af /mnt/usr.dump /usr
dump -0af /mnt/var.dump /var
For the files /boot, bsd and bsd.mp:
Code:
dump -0af /mnt/kernels.dump /bsd /bsd.mp /bsd.rd
If you have a second system that you can connect to, you don't have to do a dump for each directory separately, but could dump the complete wd0a filesystem over the network through ssh or nc.
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