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<H1>[Mageia-dev] GRUB can't see HD from chroot unless parent /dev is bind-mounted in chroot ?</H1>
<B>AL13N</B>
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TITLE="[Mageia-dev] GRUB can't see HD from chroot unless parent /dev is bind-mounted in chroot ?">alien at rmail.be
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<I>Wed Jan 16 20:48:27 CET 2013</I>
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<PRE>Op woensdag 16 januari 2013 11:30:27 schreef Liam R E Quin:
><i> On Wed, 2013-01-16 at 16:24 +0000, Colin Guthrie wrote:
</I>><i> > Personally I've been bind mounting /dev, /proc and /sys for years
</I>><i> > whenever doing any rescuecd etc. stuff. Partly because I have several
</I>><i> > LVM volumes where a static /dev/ wouldn't help anyway...
</I>><i> >
</I>><i> > But bind mounting /dev has just been part of my chroot routine for as
</I>><i> > long as I remember.
</I>><i>
</I>><i> Knowing about this would have saved me several days after trying to
</I>><i> install the mageia beta (I now have it running with the
</I>><i> 3.6.5-tmb-desktop-3.mga3 kernel as the 3.8 one is broken without a fix
</I>><i> to the recursive panic problem, which is fixed upstream). It's not
</I>><i> obvious to people who don't do it often :-)
</I>><i>
</I>><i> Why not add a command to the rescue disk,
</I>><i> bind-mount dir - mount /dev, /proc and /sys as /dir/dev etc for chroot
</I>><i>
</I>><i> Liam
</I>
because in fact, it's not really the correct solution (and there's multiple
solutions for this too)
A) mount --bind solution (in fact, only /dev is required) ; mount /proc and
/sys can be done inside.
B) in fact, udev people told us for a while now, you'd better just run udev
inside the chroot, instead of mount --bind 'ing it.
C) of course, udev is not inside systemd, so it appears the new way is now to
somehow spawn a systemd process inside the chroot (maybe systemd-nspawn?)
oh well, rescuing is for advanced users, so i don't really see the need here.
rescue should be as small as possible anyway.
i have no clue how you'd be successfull without binding; i didn't think disk
devices were statically made anyway, at least not sdX.
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