Bug 27269

On Fri, 11 May 2001 rubens_ramos@yahoo.com wrote:

> >How-To-Repeat:
> use linux to create an extended ext2fs partition.
> try to mount it in FreeBSD:
>
> mount -t ext2fs /dev/ad0s<n> /mnt
>
> It will reply: "device not configured"

Hi Rubens,

I can't repeat this on 4.3-STABLE:

bash-2.04# umount /RedHat
bash-2.04# mount -t ext2fs /dev/ad0s5 /RedHat
bash-2.04# mount -t ext2fs
/dev/ad0s6 on /Slackware (ext2fs, local)
/dev/ad0s5 on /RedHat (ext2fs, local)

I've had no problems since I can remember (4.0, maybe even 3.x).  I
don't know what might be causing problems for you.  Do you have EXT2FS
in your kernel (before AND after you apply your patch)?

-Paul.

--- Paul Herman <pherman@frenchfries.net> wrote:
> Date: Sun, 13 May 2001 08:59:22 +0200 (CEST)
> From: Paul Herman <pherman@frenchfries.net>
> To: Rubens Ramos <rubens_ramos@yahoo.com>
> Subject: Re: kern/27269: Cannot mount linux extended
> (logical) partitions
> 
> On Sat, 12 May 2001, Rubens Ramos wrote:
> 
> > > I can't repeat this on 4.3-STABLE:
> > >
> > > bash-2.04# umount /RedHat
> > > bash-2.04# mount -t ext2fs /dev/ad0s5 /RedHat
> > > bash-2.04# mount -t ext2fs
> > > /dev/ad0s6 on /Slackware (ext2fs, local)
> > > /dev/ad0s5 on /RedHat (ext2fs, local)
> > What happens if you try
> >
> > fdisk /dev/ad0
> >
> > DOes it give you the extended linux partition
> > code? (0x85 - sysid 133)
> > Maybe it works for you because you are using
> > DOS extended partitions (or Win98).
> > They work pretty much the same way...
> 
> Ah, now I see what you were getting at with your
> patch.  Yeah, FreeBSD
> most certainly doesn't know what to do with linux
> extended partitions.
> To tell the truth, this is the first time I've seen
> somebody use them.
> 
> -Paul.
> 

=====

----
Rubens Ramos Fernandes Junior
rubens_ramos@yahoo.com
----



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--- Paul Herman <pherman@frenchfries.net> wrote:
> Date: Sun, 13 May 2001 11:01:13 +0200 (CEST)
> From: Paul Herman <pherman@frenchfries.net>
> To: Rubens Ramos <rubens_ramos@yahoo.com>
> Subject: Re: kern/27269: Cannot mount linux extended
> (logical) partitions
> 
> On Sun, 13 May 2001, Rubens Ramos wrote:
> 
> > If I am not mistaken I did the partitioning
> myself, using linux
> > fdisk.
> 
> ...and chose type 0x85 for the extended partition.
> 
> > Maybe all of the other people on earth created
> their partitions
> > using msdos fdisk.
> 
> I think most of them just chose type 0x05.
> 
> Well, if your patch works, I see no reason why it
> shouldn't be
> included.
> 
> -Paul.
> 

=====

----
Rubens Ramos Fernandes Junior
rubens_ramos@yahoo.com
----



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On Sun, 13 May 2001, Rubens Ramos wrote:
>  --- Paul Herman <pherman@frenchfries.net> wrote:
>  > On Sat, 12 May 2001, Rubens Ramos wrote:
>  > > What happens if you try
>  > >
>  > > fdisk /dev/ad0
>  > >
>  > > DOes it give you the extended linux partition
>  > > code? (0x85 - sysid 133)
>  > > Maybe it works for you because you are using
>  > > DOS extended partitions (or Win98).
>  > > They work pretty much the same way...
>  > 
>  > Ah, now I see what you were getting at with your
>  > patch.  Yeah, FreeBSD
>  > most certainly doesn't know what to do with linux
>  > extended partitions.
>  > To tell the truth, this is the first time I've seen
>  > somebody use them.

This misfeature has been in Linux since at least linux-2.0.29.tar.gz
(Feb 21 1997).  Using it mainly hides the Linux partitions from other
OS's and older OS's that don't know about it.  This is not something
you should do when you want to mount Linux partitions in other OS's.

Bruce

I will totally agree with you if you could point me
to some place in the handbook/FAQ/any BSD docs
that explain this to the average user (or at
least how to fix it). The Linux+FreeBSD Howto
only says: "It is not possible to mount extended
linux partitions under FreeBSD". It looks like a
FreeBSD bug to me...

It is very difficult for someone that does not
know exactly what "partition" means to figure
that out - if it is an inconsistency in linux,
I think that the handbook/FAQ/whatever, should
have an explanation about that. (Because if this
is a problem in Linux, it is unlikely that it is
going to be explained in linux documentation ;-)

Maybe some people on newsgroups had the same problem,
and were told (as I was) that it should work with
no problems at all, and just could not solve it.
Then they just end up re-partitioning their disks
and for some reason it works "by magic" (they
use a different partition ID).

Cheers

--- Bruce Evans <bde@zeta.org.au> wrote:
> On Sun, 13 May 2001, Rubens Ramos wrote:
> >  --- Paul Herman <pherman@frenchfries.net> wrote:
> >  > On Sat, 12 May 2001, Rubens Ramos wrote:
> >  > > What happens if you try
> >  > >
> >  > > fdisk /dev/ad0
> >  > >
> >  > > DOes it give you the extended linux partition
> >  > > code? (0x85 - sysid 133)
> >  > > Maybe it works for you because you are using
> >  > > DOS extended partitions (or Win98).
> >  > > They work pretty much the same way...
> >  > 
> >  > Ah, now I see what you were getting at with
> your
> >  > patch.  Yeah, FreeBSD
> >  > most certainly doesn't know what to do with
> linux
> >  > extended partitions.
> >  > To tell the truth, this is the first time I've
> seen
> >  > somebody use them.
> 
> This misfeature has been in Linux since at least
> linux-2.0.29.tar.gz
> (Feb 21 1997).  Using it mainly hides the Linux
> partitions from other
> OS's and older OS's that don't know about it.  This
> is not something
> you should do when you want to mount Linux
> partitions in other OS's.
> 
> Bruce
> 


=====

----
Rubens Ramos Fernandes Junior
rubens_ramos@yahoo.com
----



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Comment 6 Craig Rodrigues 2007-01-31 05:31:26 UTC

State Changed
From-To: open->closed

Now that FreeBSD has moved to GEOM, this patch doesn't apply 
any more.