Hello Guys,
Reading all of your post's helped me a lot understanding linux a little
be more, thanks for sharing your knowledge.
As I stated a few post above I've tried mdadm on Debian and it works the
just fine, so I compared the scripts in /usr/share/initramfs-
tools/scripts and found out they are not so diferent from the ones in
ubuntu but still there's a diference I wanned to share with you.
When you setup mdadm on debian, a mdadm file is created in /usr/share
/initramfs-tools/scripts/local-top,(I'll paste its contend below). The
scripts in this folder get called from the local script file (The one
you guys suggest to patch). And if you compare the debian version of the
local scrip, with ubuntu's version you'll find out its pretty similar.
So I guess this could be a better solution since for example you wont
have to wait 180 secs, and you don't include "intrusive" code in the
local script.
Here goes the debian version of the local script file
[code]
# Local filesystem mounting -*- shell-script -*-
# Parameter: Where to mount the filesystem
mountroot ()
{
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-top"
run_scripts /scripts/local-top
[ "$quiet" != "y" ] && log_end_msg
# If the root device hasn't shown up yet, give it a little while
# to deal with removable devices
if [ ! -e "${ROOT}" ]; then
log_begin_msg "Waiting for root file system..."
# Default delay is 180s
if [ -z "${ROOTDELAY}" ]; then
slumber=180
else
slumber=${ROOTDELAY}
fi
if [ -x /sbin/usplash_write ]; then
/sbin/usplash_write "TIMEOUT ${slumber}" || true
fi
slumber=$(( ${slumber} * 10 ))
while [ ${slumber} -gt 0 ] && [ ! -e "${ROOT}" ]; do
/bin/sleep 0.1
slumber=$(( ${slumber} - 1 ))
done
if [ ${slumber} -gt 0 ]; then
log_end_msg 0
else
log_end_msg 1 || true
fi
if [ -x /sbin/usplash_write ]; then
/sbin/usplash_write "TIMEOUT 15" || true
fi
fi
# We've given up, but we'll let the user fix matters if they can
while [ ! -e "${ROOT}" ]; do
echo " Check root= bootarg cat /proc/cmdline"
echo " or missing modules, devices: cat /proc/modules ls /dev"
panic "ALERT! ${ROOT} does not exist. Dropping to a shell!"
done
# Get the root filesystem type if not set
if [ -z "${ROOTFSTYPE}" ]; then
eval $(fstype < ${ROOT})
else
FSTYPE=${ROOTFSTYPE}
fi
if [ "$FSTYPE" = "unknown" ] && [ -x /lib/udev/vol_id ]; then
FSTYPE=$(/lib/udev/vol_id -t ${ROOT})
[ -z "$FSTYPE" ] && FSTYPE="unknown"
fi
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-premount"
run_scripts /scripts/local-premount
[ "$quiet" != "y" ] && log_end_msg
if [ ${readonly} = y ]; then
roflag=-r
else
roflag=-w
fi
# FIXME This has no error checking
modprobe -q ${FSTYPE}
# FIXME This has no error checking
# Mount root
mount ${roflag} -t ${FSTYPE} ${ROOTFLAGS} ${ROOT} ${rootmnt}
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-bottom"
run_scripts /scripts/local-bottom
[ "$quiet" != "y" ] && log_end_msg
}
[/code]
And here is the contend of the mdadm script file located in
/usr/share/initramfs-tools/local-top folder
[code]
#!/bin/sh
#
# Copyright © 2006 Martin F. Krafft <[EMAIL PROTECTED]>
# based on the scripts in the initramfs-tools package.
# released under the terms of the Artistic Licence.
#
# $Id: script.local-top 290 2006-12-19 08:18:50Z madduck $
#
set -eu
PREREQ="udev_helper"
prereqs()
{
echo "$PREREQ"
}
case ${1:-} in
prereqs)
prereqs
exit 0
;;
esac
. /scripts/functions
if [ -e /scripts/local-top/md ]; then
log_warning_msg "old md initialisation script found, getting out of its
way..."
exit 1
fi
MDADM=/sbin/mdadm
[ -x "$MDADM" ] || exit 0
verbose()
{
case "$quiet" in y*|Y*|1|t*|T*)
return 1;;
*)
return 0;;
esac
}
MD_DEVS=all
MD_MODULES='linear multipath raid0 raid1 raid456 raid5 raid6 raid10'
[ -s /conf/md.conf ] && . /conf/md.conf
verbose && log_begin_msg Loading MD modules
for module in ${MD_MODULES:-}; do
if modprobe --syslog "$module"; then
verbose && log_success_msg "loaded module ${module}."
else
log_failure_msg "failed to load module ${module}."
fi
done
log_end_msg
if [ ! -f /proc/mdstat ]; then
verbose && panic "cannot initialise MD subsystem (/proc/mdstat missing)"
exit 1
fi
# handle /dev/md/X nodes
mkdir --parent /dev/md
CONFIG=/etc/mdadm/mdadm.conf
# in case the hook failed to install a configuration file, this is our last
# attempt... the "emergency procedure"... <drumroll>
if [ ! -e $CONFIG ]; then
log_warning_msg "missing mdadm.conf file, trying to create one..."
mkdir -p ${CONFIG%/*}
echo DEVICE partitions > $CONFIG
$MDADM --examine --scan >> $CONFIG
if [ -s $CONFIG ]; then
verbose && log_success_msg "mdadm.conf created."
else
verbose && log_failure_msg "could not create mdadm.conf, the boot will
likely fail."
fi
MD_DEVS=all
fi
if [ "$MD_DEVS" = all ]; then
verbose && log_begin_msg "Assembling all MD arrays"
extra_args=''
[ -n "$MD_HOMEHOST" ] && \
extra_args="--homehost='$MD_HOMEHOST' --auto-update-homehost"
if $MDADM --assemble --scan --run --auto=yes $extra_args; then
verbose && log_success_msg "assembled all arrays."
else
log_failure_msg "failed to assemble all arrays."
fi
verbose && log_end_msg
elif [ "$MD_DEVS" != none ]; then
for dev in $MD_DEVS; do
verbose && log_begin_msg "Assembling MD array $dev"
if $MDADM --assemble --run --auto=yes $dev; then
verbose && log_success_msg "started $dev"
else
log_failure_msg "failed to start $dev"
fi
verbose && log_end_msg
done
fi
exit 0
[/code]
Hope this works, didn't have time nor PC to try this, but maybe someone
could give it a try :)
Kind Regards,
Diego Bendlin
--
cannot boot raid1 with only one disk
https://bugs.launchpad.net/bugs/120375
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