Date: Tue, 11 Jun 2002 08:12:33 +0200 (MEST) From: Lutz Kittler <Lutz.Kittler@sse-erfurt.de> To: "Greg 'groggy' Lehey" <grog@FreeBSD.org> Cc: Akthar Hussain <ahussain_fbsd@msn.com>, questions@freebsd.org Subject: Re: Mounting Freebsd part in Linux Message-ID: <15621.38097.104455.412473@master.sse-erfurt.de> In-Reply-To: <20020611051421.GD3644@wantadilla.lemis.com> References: <DAV22cqJGzaBkNc2DIz000125f8@hotmail.com> <20020611051421.GD3644@wantadilla.lemis.com>
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Greg 'groggy' Lehey writes:
>
> On Tuesday, 11 June 2002 at 10:29:03 +0530, Akthar Hussain wrote:
> > Hi,
> >
> >
> > I had compiled new kernel in Linux to mount NTFS and UFS.Also able
> > to read BSD disk label.
> >
> > in kernel >>fileSYSTEM options I had selected ,create modules for
> > NTFS ,UFS,and read BSD disk label.
> >
> > if I boot my system with new kennel I can able to mount only ntfs
> > partitions.but if I try to mount my FreeBSD partitions it gives error
> > "unable to mount or invalid superbalck"
> >
> > also ufs and ntfs modules are available in
> > /lib/modules/..8.-cus/kernel/fs/.
>
> > my partitions are
> >
> > hda1 = /boot (Linux)
> > hda2 or ad0s2 = freebsd
> > hda3 = / for Linux
> >
> > hdb1 = ntfs
> > hdb2 = ntfs
> >
> > they way i tried to mount freebsd is
> >
> > mount -t ufs /dev/hda2 /mnt
> >
> > or
> >
> > mount -t ufs -o ufstype=44bsd /dev/hda2 /mnt
> >
> > also some time it gives your kernel support only read only
> > options.but i tried with -r , no improvement.
> >
> > if any one can help me ?
> >
> > do i have to do any extra changes in my kernet to mount ufs (freebsd
> > partitions)
> >
> > is it my way of mounting is right ??
> >
> > my linux kernel is 2.4.18. redhat 7.3.
>
> This appears to be a Linux problem. It's possible that the Linux ufs
> implementation doesn't correctly recognize modern FreeBSD file
> systems.
>
> Greg
Hi,
I had the same problem and found the following :
Disklabel on FreeBSD uses bsize of 16384 for partitions from 1GB
man disklabel :
bsize For 4.2BSD and LFS file systems only, the block size.
Defaults to 8192 for partitions smaller than 1 GB,
16384 for partitions 1GB or larger.
But linux-kernel 2.4 will not use it:
/usr/src/linux/fs/ufs/super.c:
if (uspi->s_bsize != 4096 && uspi->s_bsize != 8192
&& uspi->s_bsize != 32768) {
printk("ufs_read_super: fs_bsize %u != {4096, 8192, 32768}\n",
uspi->s_bsize);
goto failed;
}
If you got this error you can set bsize when creating slices by
disklabel -e.
lutz
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