gmirror, sparc and SCSI problems

[Marius Strobl]

On Sat, Jul 09, 2005 at 05:36:43PM +0100, Chris Hodgins wrote:
> On 7/9/05, Danny Howard <dannyman at toldme.com> wrote:
> > On Fri, Jul 08, 2005 at 03:48:52PM +0100, Chris Hodgins wrote:
> > > Hi all,
> > >
> > > Experiencing a few difficulties setting up raid mirroring across two
> > > SCSI disks on a sparc based server.  Disk da0 contains a working and
> > > recent install of FreeBSD 5-4 RELEASE and da1 is blank.  We have been
> > > following the guidance given in the first part of
> > > http://people.freebsd.org/~rse/mirror/ but have hit numerous problems.
> > 
> > Chris,
> > 
> > These instructions are useful if you don't want to boot into recovery
> > console to set things up offline.  You can save a lot of fancy footwork
> > if you have physical access and a CD-ROM, and don't mind about 15
> > minutes of downtime.  My crib sheet is at
> > http://dannyman.toldme.com/2005/01/24/freebsd-howto-gmirror-system/ .
> > 
> > If it does work for you, plesae let me know.  I'd be plased to hear that
> > it can handle Sparc. :)
> > 
> > Sincerely,
> > -danny
> > 
> 
> Danny,
> 
> Thanks for the link.  This was actually the first link we tried to get
> working and after it failed to work we followed the link on the page
> to http://people.freebsd.org/~rse/mirror/.
> 
> Everything worked fine until we arrived at this step below.  
> # mount /dev/mirror/gm0s1a /mnt
> 
> It seems that gmirror does not give us any partitions.  A listing of
> the mirror directory shows only the gm0 node even though da0 is
> partitioned.  When mounting the mirror it seems that /dev/mirror/gm0
> only represents the root partition.  How can we get the mirror to
> recognise the other partitions?
> 

Sparc and sparc64 don't use slices so instead of fdisk(8) and
bsdlabel(8) one just uses sunlabel(8) on sparc64. This should
also mean that instead of `mount /dev/mirror/gm0s1a /mnt` one
would use e.g. `mount /dev/mirror/gm0a /mnt` on sparc64.
I don't know though if gmirror(8) needs to be made aware of
this for e.g. `gmirror label` to do the right thing or maybe
already is, i.e.  whether it needs further changes in order to
make it work on sparc64.

Marius