On Thu, 12 May 2005 02:38:11 +1000
matthew green <mrg@eterna.com.au> wrote:

> disklabel -W sd0
But there was already a valid disklabel(5) on the drive as it contained
a NetBSD 2.0 instalation before. I never had to use "-W" on NetBSD
prior. (IIRC Tru64 is the only *ix I came across that needs "-W" to
make the disklabel(5) writable.)

Leaving nothing untried: (I stored the old disklabel(5) in the file "dl".)

# disklabel -W sd0


# disklabel -rR sd0 dl
write: No such file or directory


# disklabel sd0
# /dev/rsd0c:
type: unknown
disk: mydisk
label:=20
flags:
bytes/sector: 512
sectors/track: 218
tracks/cylinder: 10
sectors/cylinder: 2180
cylinders: 8152
total sectors: 17774160
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0=20

8 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a:    263780         0     4.2BSD   1024  8192     0  # (Cyl.      0 -   1=
20)
 b:    525380    263780       swap                     # (Cyl.    121 -   3=
61)
 c:  17774160         0     unused      0     0        # (Cyl.      0 -  81=
53*)
 e:   2097160    789160     4.2BSD   2048 16384     0  # (Cyl.    362 -  13=
23)
 f:  14887840   2886320     4.2BSD   2048 16384     0  # (Cyl.   1324 -  81=
53*)


# newfs /dev/rsd0f
/dev/rsd0f: 7269.5MB (14887840 sectors) block size 16384, fragment size 2048
        using 40 cylinder groups of 181.75MB, 11632 blks, 22784 inodes.
wtfs: write error for sector 14887839: Undefined error: 0


# dd if=3D/dev/zero of=3D/dev/rsd0b bs=3D1k count=3D16
dd: /dev/rsd0b: end of device
1+0 records in
0+0 records out
0 bytes transferred in 0.008 secs (0 bytes/sec)


# dd if=3D/dev/zero of=3D/dev/sd0b bs=3D1k count=3D16
16+0 records in
16+0 records out
16384 bytes transferred in 0.083 secs (197397 bytes/sec)


# disklabel -r sd0
# /dev/rsd0c:
type: unknown
disk: mydisk
label:=20
flags:
bytes/sector: 512
sectors/track: 218
tracks/cylinder: 10
sectors/cylinder: 2180
cylinders: 8152
total sectors: 17774160
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0=20

8 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a:    263780         0     4.2BSD   1024  8192     0  # (Cyl.      0 -    =
120)
 b:    525380    263780       swap                     # (Cyl.    121 -    =
361)
 c:  17774160         0     unused      0     0        # (Cyl.      0 -   8=
153*)
 e:   2097160    789160     4.2BSD   2048 16384     0  # (Cyl.    362 -   1=
323)
 f:  14887840   2886320     4.2BSD   2048 16384     0  # (Cyl.   1324 -   8=
153*)
--=20


tsch=FC=DF,
       Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/