Re: Setting up raid correctly

[Philip Mueller <spectre2%gmx.de@localhost>]

On 24.02.2013 13:18, Manuel Bouyer wrote:
> On Sun, Feb 24, 2013 at 01:50:31PM +0100, Philip Mueller wrote:
> > Thanks for Answer.
> > I want to create a raid1 for wd3d and component.
> > And when I boot another system, which does not known anything about netbsd 
> > raid1, can it mount wd3 via mount_ufs2?
> > For example gmirror on FreeBSD.
> > I have create raid1 on FreeBSD via gmirror and could mount wd3 on another 
> > system like linux for read (via mount_ufs).
> > Is this in netbsd also possible or is it only readable in netbsd via raidctl 
> > and dkctl?
> You should be able to mount it (read-only because the other disk of the raid-1
> won't be updated on write, and as raidframe isn't aware of it things
> will go bad) by creating a partition on wd3 that point to the
> start of the ffs on disk (wd3d points to the raidframe metadata).
> The offset of this partition would be 128 (this is the size of raidframe's
> metadata if my memory is right) + the partition's offset in the raid-1
> volume.
This sounds good, but how should I mount /dev/wd3 to read the data on 
this storage? Should I dkctl /dev/wd3?
I can not mount wd3 regular, there is no partition shown on it:
$raidctl -uv raid1 && gpt show wd3d
       start        size  index  contents
           0  3907029168
This is my main problem: When I create a raid and in there a partition 
as gpt + newfs, I cannot mount this partition without raid.