Subject: Re: Migration question( OpenBSD 2.9 -> NetBSD -current)
To: Luke Mewburn <firstname.lastname@example.org>
From: Milos Urbanek <email@example.com>
Date: 05/02/2002 11:37:50
On Thu, May 02, 2002 at 09:47:14AM +1000, Luke Mewburn wrote:
> | My experience is that although NetBSD and OpenBSD use ffs fs, there are
> | some subtle differences that cause the NetBSD not to be able to mount ffs
> | partitions created under OpenBSD.
> | More specifically, under NetBSD current (e.g. 1.5ZC) you can mount
> | ffs partition from OpenBSD 3.0, but when you do a 'ls' or another
> | fs operation on it you will get an EBADF error if I'm correct.
> This is interesting. Do you have any further details? Does NetBSD
> current's fsck_ffs (with -n to "not change" the file system) work
> on the OpenBSD ffs partitions?
Ok. I will put my disk with NetBSD 1.5ZC in the machine with
2 disks with OpenBSD 3.0 ffs partitions and try to elaborate a bit around
I remember that when I was installing NetBSD 1.5ZC on my computer I
had there one OpenBSD ffs partition from OpenBSD 3.0. When I tried
to run fsck on the partition it dumped a core after receiving a signal
I already do not remember the failure message but it was something that
contained substring "floating point operation".
(I don't remember right now the exact details but I will have a closer
look at it and I will try to send you more specific details.)
I solved this by running NetBSD newfs at the partition..
> A while ago I took pains to ensure that the ffs superblock in NetBSD
> would be compatible with FreeBSD's and OpenBSD's, so that explains why
> the mount worked ok. I also took a brief look at other changes in ffs
> on those systems at the time and I don't recall anything that would be
> done to make things difficult.
> If possible, I would like for NetBSD to be able to mount FreeBSD and
> OpenBSD ffs partitions (there really should be no need for gratitious
> incompability here, especially if we're not using newer features such
> as snapshots on the partition, as all three systems are relatively
> "close" in this way), and possibly other platforms such as MacOS X,
> Solaris, etc.
> | Therefore I would suggest you to do a full backup (e.g. using tar) and than
> | reinitialize your disks by fresh NetBSD-like raid/ffs partitions.
> | Milos
> Luke Mewburn <firstname.lastname@example.org> http://www.wasabisystems.com
> Luke Mewburn <email@example.com> http://www.netbsd.org
> Wasabi Systems - NetBSD hackers for hire
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