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Operating Systems Linux initrd
# 1  
Old 02-18-2006
initrd
ok, I'm trying to roll an initrd from scratch for learning purposes. I'm using cramfs for the filesystem so that I can modularize ext2 and ext3. The initrd has the modules required for ext3, a static insmod, a statis 'ash', static pivot_root, and a linuxrc that mounts the needed root partition after insmod'ing the needed ext3 ko's (like jbd, etc)

the problem comes with the reboot, I try to boot and it exec's the /linuxrc script which uses ash, calling all utilites with their full pathes and pivots root from the mount point of the root partition to /

the problem is this: all my messages are reported to the user as successes, however they're obviously not, when I give init=/bin/sh (which on my root partition is a link to bash, but in initrd is what ash is called) I try to do an ls (both by itself and it's supposed path) it says it can't find it, if I try to auto-complete on the mount point for root it says access is denied, and I'm apparently still running in ash.

so, can anyone help me here?
Last edited by thmnetwork; 02-18-2006 at 06:13 PM..
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LEARN ABOUT XFREE86

mkdumprd

MKDUMPRD(8)							   User Manuals 						       MKDUMPRD(8)

NAME

       mkdumprd - (Re)build the initramfs for kdump

SYNOPSIS

       mkdumprd [-h] [-q] [-f] [-k kernelver] [-i opts]

DESCRIPTION

       mkdumprd (re-)builds the kdump initrd. For kdump, a special initrd is used because

       o   the kdump initrd should include network modules and network configuration (and therefore is larger as the normal initrd used for
	   booting),

       o   the kdump initrd should use no splash screen,

       o   the kdump initrd includes kdumptool(8) and all required libraries.

       This script calls mkinitrd(8) with all required parameters. If the initrd already exists, it checks first if the configuration file or the
       kernel are newer, and only rebuilds the initrd if necessary.

OPTIONS

       All option parsing is done via the getopt(3) function, and therefore follows all standard command line parsing rules.

       -h | --help
	   Shows help output and exits.

       -k kernelversion
	   Specifies the kernel version. If no version is specified and also no kernel or initrd are specified, then mkdumprd uses kdumptool(8) to
	   find out the correct kernel and initrd.

       -K kernel
	   Specifies the kernel binary. If you specify that option, also specify -I.

       -I initrd
	   Specifies the resulting initrd. If you specify that option, also specify -K.

       -q
	   Be quiet. Don't output status messages. Used to call mkdumprd(8) from /etc/init.d/kdump init script.

       -i parameters
	   Append the specified parameters to mkinitrd(8) call.

FILES

       /etc/sysconfig/kdump
	   Kdump configuration. See kdump(5).

BUGS

       Please report bugs and enhancement requests at https://bugzilla.novell.com.

COPYING

       Copyright (c) 2008 Bernhard Walle <bwalle@suse.de>. Free use of this software is granted under the terms of the GNU General Public License
       (GPL), version 2 or later.

SEE ALSO

       kdumptool(8), mkinitrd(8), http://en.opensuse.org/Kdump

kdump 0.8.1							    07/05/2010							       MKDUMPRD(8)