Subject: Re: mounting OpenBSD filesystem
To: None <reed@reedmedia.net>
From: Gary Thorpe <gat7634@hotmail.com>
List: tech-misc
Date: 08/15/2002 15:02:02
>From: "Jeremy C. Reed" <reed@reedmedia.net>
>To: tech-misc@netbsd.org
>Subject: mounting OpenBSD filesystem
>Date: Wed, 14 Aug 2002 20:44:42 -0700 (PDT)
>
>I want to mount OpenBSD filesystems. I read that it is not supported.
>
>Is it supported?
>
>If not, can anyone share any suggestions on where to get started in trying
>to be able to do this?
>
>This is what OpenBSD 3.1 sees:
>
># using MBR partition 3: type A6 off 63 (0x3f) size 2491713 (0x260541)
># /dev/rwd0c:
>type: ESDI
>disk: ESDI/IDE disk
>label: Conner Periphera
>flags:
>bytes/sector: 512
>sectors/track: 63
>tracks/cylinder: 16
>sectors/cylinder: 1008
>cylinders: 2477
>total sectors: 2496876
>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: 2400000 63 4.2BSD 1024 8192 16 # (Cyl. 0*-
>2381*)
> b: 96813 2400063 swap # (Cyl. 2381*-
>2477*)
> c: 2496876 0 unused 0 0 # (Cyl. 0 -
>2477*)
>
>This is what NetBSD/i386 1.5.3 (rescue-small disk) sees:
>
># /dev/rwd0d:
>type: ESDI
>disk: wd0s1
>label:
>flags:
>bytes/sector: 512
>sectors/track: 63
>tracks/cylinder: 255
>sectors/cylinder: 16065
>cylinders: 155
>total sectors: 2496816
>rpm: 3600
>interleave: 1
>trackskew: 0
>cylinderskew: 0
>headswitch: 0 # microseconds
>track-to-track seek: 0 # microseconds
>drivedata: 0
>
>8 partitions:
># size offset fstype [fsize bsize cpg/sgs]
> a: 65536 0 4.2BSD 0 0 0 # (Cyl. 0 -
>4*)
> b: 183712 65536 swap # (Cyl. 4*-
>15*)
> c: 2496816 0 unused 0 0 # (Cyl. 0 -
>155*)
> e: 61440 249248 4.2BSD 0 0 0 # (Cyl. 15*-
>19*)
> f: 2186128 310688 4.2BSD 0 0 0 # (Cyl. 19*-
>155*)
>
>What is the preferred mailing list to discuss this?
>
>Thanks,
>
> Jeremy C. Reed
> http://bsd.reedmedia.net/
You may want to indicate what arch this is for...my gues is i386?
A related question: does netBSD actually support more than 8 partitions per
disk? I had read that it had bumped this limit to 16, but is this only for
1.6's branch? Is this arch-specific also?
Another question: if OpenBSD and NetBSD no longer use the same disklabel
scheme (if I understand the output above), why don't they use formats which
cannot be mistaken for each other? Was it *necessary* to make them
incompatibe in the first place?
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