Unable to mount the root fs on stable/8 r264339, GENERIC kernel, with MBR, FreeBSD slice, and UFS volume labels

[Erich Dollansky]

Hi,

On Sat, 12 Apr 2014 14:02:08 +0200 (CEST)
Trond Endrestøl <Trond.Endrestol at fagskolen.gjovik.no> wrote:

> On Sat, 12 Apr 2014 08:00+0800, Erich Dollansky wrote:
> 
> > does your GENERIC have these options enabled:
> 
> No, the GENERIC kernel is untouched by me.
> 
> The generic GENERIC kernel contains only:
> 
> options 	GEOM_PART_GPT		# GUID Partition Tables.
> options 	GEOM_LABEL		# Provides labelization
> 
> I'll try the options/modules listed below
> 
> > options	GEOM_PART_BSD
> > options GEOM_PART_MBR

you need at least these two to boot UFS on a MBR schema.

> > options GEOM_PART_GPT
> > options GEOM_RAID
> > options GEOM_LABEL
> > options	GEOM_PART_EBR

You should also need the last one.

> > options GEOM_PART_EBR_COMPAT

I use this as I was told to do so but I do not know if this is really
needed.

> > 
> > If not or if you are not sure try to load these modules during boot
> > time. Of course, if you do not use GPT or RAID, you do not have to
> > load these modules.
> 
> If you've followed this thread you'll probably remember me doing some 
> experiments in VirtualBox at home last evening local time.

I saw.
> 
> An untouched stable/8 GENERIC kernel had no problem mounting the root 
> fs when told to do so by way of a UFS label, i.e. /dev/ufs/root. I 
> tried VirtualBox' IDE controller and SCSI controller, and it worked 
> flawlessly each time.
> 
The only idea I have is that the GENERIC configuration has changed. I
remember a change in this are when 10 was still CURRENT which gave me
some confusion. OK, this was CURRENT, this should not happen on the old
8.x.

Erich