Incorrect super block

[Harald]

On Fri, Feb 19, 2010 at 01:03:37AM -0800, perryh at pluto.rain.com wrote:
> Ivan Voras <ivoras at freebsd.org> wrote:
> > On 02/18/10 16:26, Harald Weis wrote:
> > > Has anybody encountered the following problem ?
> > >
> > > Mac OS X does recognize FreeBSD partitions on USB disks, but
> > > doesn't want to mount them because ``Incorrect super block''.
> > > This is extremely annoying for my ``client'' because he relies
> > > on dayly backups on USB keys. Is there a solution ?
> >
> > Are you using UFS1 or UFS2? If one, try the other :)
> 
> This is not the first time I've heard of one OS having problems with
> another OS' instantiation of UFS.  For the particular application at
> hand, I'd use tar(1) to collect the files into a single stream and
> write the tarfile onto a USB key formatted as FAT32.  OS X should
> have no trouble reading a FreeBSD tarfile.

Many thanks for all replies, on- and off-list. I'll do the various
trials (ufs1, fat32, etc.) as soon as possible. Triggered by the
off-list post, I've understood from sysutils/fusefs-ntfs/pkg-descr that
ntfs doesn't preserve file ownerships and access rights. I'm afraid this
is also true for fat32. If that is confirmed ntfs and fat32 are useless
in combination with rsync(1), which leaves indeed only tar(1) and
fat32|ntfs :-(

With the permission of the author I have bounced the off-list reply. The
list seems to have filtered it. So here it is:
===
Date: Thu, 18 Feb 2010 10:31:54 -0500
From: Lucas Holt <luke at foolishgames.com>
Subject: Re: Incorrect super block
To: Harald Weis <hawei at free.fr>

Harald Weis wrote:
>Has anybody encountered the following problem ?
> 
>Mac OS X does recognize FreeBSD partitions on USB disks, but doesn't
>want to mount them because ``Incorrect super block''.
>This is extremely annoying for my ``client'' because he relies on dayly
>backups on USB keys. Is there a solution ?
> 
>Thank you in advance.
> 
You could use another file system such as Fat32 or NTFS (fuse ntfs from
ports).  OS X can read both of those.  Apple has been moving away from
UFS support in OS X for awhile; snow leopard is quite stale on this
front.

Luke
===

Thanks again. I'll report a.s.a.p. the outcome of the ufs1 experiment.

Harald