Getting rid of HFS partition...

[patrick keshishian]

Greetings,

I have been running openbsd (-current) on my ibook g4, dual booting
between obsd and mac osx. But I have been using less and less of osx.
I want to completely get rid of the HFS partition and reuse it for
obsd.

If I understanding this correctly I should be able to run `fdisk -u'
and newfs the wd0i? I don't have experience mucking with fdisk so I
want to be sure I'm not going to screw up my current obsd set up.

Any words of wisdom from pros would be greatly appreciated.

--patrick

$ sudo disklabel wd0
# /dev/rwd0c:
type: ESDI
disk: ESDI/IDE disk
label: SAMSUNG HM100JC
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 193821
total sectors: 195371568
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0

16 partitions:
#                size           offset  fstype [fsize bsize  cpg]
  a:           306832         97685888  4.2BSD   2048 16384    1
  b:          2097648         97992720    swap
  c:        195371568                0  unused
  d:           409248        100090368  4.2BSD   2048 16384    1
  e:           409248        100499616  4.2BSD   2048 16384    1
  f:         62914320        100908864  4.2BSD   2048 16384    1
  g:         16777152        163823184  4.2BSD   2048 16384  328
  i:         97423680           262208     HFS


I'm not quite sure what exactly the following is telling me:

$ sudo fdisk wd0
Disk: wd0       geometry: 193821/16/63 [195371568 Sectors]
Offset: 0       Signature: 0x0
            Starting         Ending         LBA Info:
 #: id      C   H   S -      C   H   S [       start:        size ]
-------------------------------------------------------------------------------
 0: 00      0   0   0 -      0   0   0 [           0:           0 ] unused
 1: 00      0   0   0 -      0   0   0 [           0:           0 ] unused
 2: 00      0   0   0 -      0   0   0 [           0:           0 ] unused
 3: 00      0   0   0 -      0   0   0 [           0:           0 ] unused

[Tim Saueressig, thepixelz.com]

hi,
just do a new install and choose the mbr method and
"Do you want to use *all* of wd0 for OpenBSD?" [y]
in the installer and you are done .

regards
tim
patrick keshishian schrieb:

> Greetings,
>
> I have been running openbsd (-current) on my ibook g4, dual booting
> between obsd and mac osx. But I have been using less and less of osx.
> I want to completely get rid of the HFS partition and reuse it for
> obsd.
>
> If I understanding this correctly I should be able to run `fdisk -u'
> and newfs the wd0i? I don't have experience mucking with fdisk so I
> want to be sure I'm not going to screw up my current obsd set up.
>
> Any words of wisdom from pros would be greatly appreciated.
>
> --patrick
>
> $ sudo disklabel wd0
> # /dev/rwd0c:
> type: ESDI
> disk: ESDI/IDE disk
> label: SAMSUNG HM100JC
> flags:
> bytes/sector: 512
> sectors/track: 63
> tracks/cylinder: 16
> sectors/cylinder: 1008
> cylinders: 193821
> total sectors: 195371568
> rpm: 3600
> interleave: 1
> trackskew: 0
> cylinderskew: 0
> headswitch: 0           # microseconds
> track-to-track seek: 0  # microseconds
> drivedata: 0
>
> 16 partitions:
> #                size           offset  fstype [fsize bsize  cpg]
>   a:           306832         97685888  4.2BSD   2048 16384    1
>   b:          2097648         97992720    swap
>   c:        195371568                0  unused
>   d:           409248        100090368  4.2BSD   2048 16384    1
>   e:           409248        100499616  4.2BSD   2048 16384    1
>   f:         62914320        100908864  4.2BSD   2048 16384    1
>   g:         16777152        163823184  4.2BSD   2048 16384  328
>   i:         97423680           262208     HFS
>
>
> I'm not quite sure what exactly the following is telling me:
>
> $ sudo fdisk wd0
> Disk: wd0       geometry: 193821/16/63 [195371568 Sectors]
> Offset: 0       Signature: 0x0
>             Starting         Ending         LBA Info:
>  #: id      C   H   S -      C   H   S [       start:        size ]
> -------------------------------------------------------------------------------
>  0: 00      0   0   0 -      0   0   0 [           0:           0 ] unused
>  1: 00      0   0   0 -      0   0   0 [           0:           0 ] unused
>  2: 00      0   0   0 -      0   0   0 [           0:           0 ] unused
>  3: 00      0   0   0 -      0   0   0 [           0:           0 ] unused

[patrick keshishian]

On Fri, Apr 17, 2009 at 1:17 AM, Tim Saueressig, thepixelz.com
<tim@...> wrote:
> hi,
> just do a new install and choose the mbr method and
> "Do you want to use *all* of wd0 for OpenBSD?" [y]
> in the installer and you are done .

That's definitely one way of doing it :)

--patrick

> regards
> tim
> patrick keshishian schrieb:
>>
>> Greetings,
>>
>> I have been running openbsd (-current) on my ibook g4, dual booting
>> between obsd and mac osx. But I have been using less and less of osx.
>> I want to completely get rid of the HFS partition and reuse it for
>> obsd.
>>
>> If I understanding this correctly I should be able to run `fdisk -u'
>> and newfs the wd0i? I don't have experience mucking with fdisk so I
>> want to be sure I'm not going to screw up my current obsd set up.
>>
>> Any words of wisdom from pros would be greatly appreciated.
>>
>> --patrick
>>
>> $ sudo disklabel wd0
>> # /dev/rwd0c:
>> type: ESDI
>> disk: ESDI/IDE disk
>> label: SAMSUNG HM100JC
>> flags:
>> bytes/sector: 512
>> sectors/track: 63
>> tracks/cylinder: 16
>> sectors/cylinder: 1008
>> cylinders: 193821
>> total sectors: 195371568
>> rpm: 3600
>> interleave: 1
>> trackskew: 0
>> cylinderskew: 0
>> headswitch: 0 B  B  B  B  B  # microseconds
>> track-to-track seek: 0 B # microseconds
>> drivedata: 0
>>
>> 16 partitions:
>> # B  B  B  B  B  B  B  B size B  B  B  B  B  offset B fstype [fsize bsize

B cpg]
>> B a: B  B  B  B  B  306832 B  B  B  B  97685888 B 4.2BSD B  2048 16384 B
B 1
>> B b: B  B  B  B  B 2097648 B  B  B  B  97992720 B  B swap
>> B c: B  B  B  B 195371568 B  B  B  B  B  B  B  B 0 B unused
>> B d: B  B  B  B  B  409248 B  B  B  B 100090368 B 4.2BSD B  2048 16384 B
B 1
>> B e: B  B  B  B  B  409248 B  B  B  B 100499616 B 4.2BSD B  2048 16384 B
B 1
>> B f: B  B  B  B  62914320 B  B  B  B 100908864 B 4.2BSD B  2048 16384 B
B 1
>> B g: B  B  B  B  16777152 B  B  B  B 163823184 B 4.2BSD B  2048 16384
B 328

>> B i: B  B  B  B  97423680 B  B  B  B  B  262208 B  B  HFS
>>
>>
>> I'm not quite sure what exactly the following is telling me:
>>
>> $ sudo fdisk wd0
>> Disk: wd0 B  B  B  geometry: 193821/16/63 [195371568 Sectors]
>> Offset: 0 B  B  B  Signature: 0x0
>> B  B  B  B  B  B Starting B  B  B  B  Ending B  B  B  B  LBA Info:
>> B #: id B  B  B C B  H B  S - B  B  B C B  H B  S [ B  B  B  start: B  B

B  B size ]
>>
>>
-----------------------------------------------------------------------------
--
>> B 0: 00 B  B  B 0 B  0 B  0 - B  B  B 0 B  0 B  0 [ B  B  B  B  B  0: B  B
B  B  B  0 ] unused
>> B 1: 00 B  B  B 0 B  0 B  0 - B  B  B 0 B  0 B  0 [ B  B  B  B  B  0: B  B
B  B  B  0 ] unused
>> B 2: 00 B  B  B 0 B  0 B  0 - B  B  B 0 B  0 B  0 [ B  B  B  B  B  0: B  B
B  B  B  0 ] unused
>> B 3: 00 B  B  B 0 B  0 B  0 - B  B  B 0 B  0 B  0 [ B  B  B  B  B  0: B  B
B  B  B  0 ] unused

[Fred Crowson]

patrick keshishian wrote:
</snipped>
>
> I suppose, unless I hear otherwise on the list, I'll prep for a
> reinstall by doing a backup. Before a fresh install I'll try doing
> `fdisk -u' and newfs the hfs partition. If it works I'll write back to
> the list :)
>
> Thanks for your reply,
> --patrick

Hi Patrick,

There is a chance that using newfs on the HFS partition might render
OpenBSD unbootable - it might be worth looking at the standard install
script to see how that prepares an mbr on macppc:

http://www.openbsd.org/cgi-bin/cvsweb/src/distrib/macppc/ramdisk/install.md?rev=1.38

I look forward to reading about your adventures :~)

Fred