Re: [gentoo-user] boot failure using root=LABEL=RAID1root but not LABEL=RAID6root

Mark Knecht <markknecht@×××××.com> wrote:

> On Mon, Dec 31, 2012 at 2:28 PM, Bruce Hill
> <daddy@×××××××××××××××××××××.com> wrote:
> > On Mon, Dec 31, 2012 at 02:09:35PM -0800, Mark Knecht wrote:
> >>
> >> I don't know if you're right but it makes sense. If I need e2label to
> >> read labels from the CLI then I probably need all the same stuff in
> >> the initramfs which this one doesn't have.
> >>
> >> The problem I have with that idea is that all I put in the RAID6 which
> >> does have an initramfs is e2fsck, not e2label or anything else.
> >> However maybe e2fsck has that capability and that's why it's working?
> >>
> >> Good catch!
> >>
> >> Thanks, and best wishes for the new year and a safe New Year's eve to all.
> >>
> >> Cheers,
> >> Mark
> >
> > I've deleted your OP (sorry), but also, the kernel autodetects RAID using
> > metadata 0.90 superblocks, but not 1.2 superblock (seems your output had some
> > of each?).
> > --
>
> Hi Bruce,
>    Yes, in the first and older Gentoo build I'm letting the kernel
> autodetect RAID1 to find /. That's the install that does NOT work
> mounting by label.
>
>    In the second install I use an initramfs, / is on a RAID6 and is
> not autodetected. Rather I assemble the RAID6 within the initramfs
> using mdadm --assemble ####. The initramfs has both e2fsck & mdadm so
> it's able to assemble the RAID. It's also able to mount by label
> without any problems.
>
>    Joost is suggesting that there might have been a thread earlier
> this year that said you must use an initramfs to mount by label, but I
> cannot find any grub documentation that supports that, and so far have
> not discovered the thread he's remembering.

I know you need at least proc to get the label, so maybe the init ramfs
will have /proc.

-- 
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         covici@××××××××××.com