Re: [gentoo-user] RAID1 + LVM2 booting screwed up. Help, please!

[Alan Mackenzie <acm@muc.de>]

Hi, Alan.

On Sun, Apr 10, 2011 at 11:33:13PM +0200, Alan McKinnon wrote:
> Apparently, though unproven, at 23:11 on Sunday 10 April 2011, Alan Mackenzie 
> did opine thusly:

> > Hi, Gentoo.

> > My new(ish) amd64 system has two 1TB HDDs in a (software) RAID1, and
> > practically the entire system is under an LVM2.

> > I rather unwisely made this addition to the startup stuff:

> >     ls -s /usr/bin/svscanboot /etc/init.d/
> >     rc-update add svscanboot default

> > , and now the box hangs during boot up.

> > On the same box, I also have a "trial" installation which boots and I
> > still have the installation CD from about a year ago.

> > Would somebody please help me get into my system sufficiently to
> > correct my mistake on the boot scripts.  Pointing me in the direction
> > of a fine manual section would be regarded as help.

> Boot the trial installation which does boot.
> vgchange -ay
> find and mount your lvm volumes somewhere
> now you can access that dodgy symlink to delete it

> Maybe there's other steps (like loading kernel modules), but I'm
> assuming you know your way around to find and detect those.

It turns out I panicked needlessly, since my root partition is on
/dev/sdb1.  I didn't manage to figure out how to get / onto the LVM2 way
back when.  I'm glad I didn't delete the "trial" installation, which I'm
renaming to "rescue" :-).

Thanks for the tip.  I've a feeling I'll be needing vgchange sometime or
other.

> -- 
> alan dot mckinnon at gmail dot com

-- 
Alan Mackenzie (Nuremberg, Germany).