Sorry folks, being tooo fast.
This is not working if all discs are present, now i understand the
include of MD_DEGRADED_ARGS
my new workaround is to add a bootmenue entry in grub
title Ubuntu, kernel 2.6.20-16-generic (raid defect)
root (hd0,1)
kernel /boot/vmlinuz-2.6.20-16-generic root=/dev/md1 ro raid_degraded
initrd /boot/initrd.img-2.6.20-16-generic
and /etc/initramfs-tools/scripts/init-premount/raid_degraded
#!/bin/sh
set -eu
PREREQ="udev"
prereqs()
{
echo "$PREREQ"
}
case ${1:-} in
prereqs)
prereqs
exit 0
;;
*)
. /scripts/functions
;;
esac
if [ -e /scripts/local-top/md ]; then
log_warning_msg "old md initialisation script found, getting out of its
way..."
exit 1
fi
MDADM=$(command -v mdadm)
[ -x $MDADM ] || exit 0
if grep raid_degraded /proc/cmdline 2>/dev/null; then
echo "MD_DEGRADED_ARGS=' '" >> /conf/md.conf
fi
exit 0
now if a disc is defect and i will to start only with one disc i choose
raid defect from bootmenu
--
cannot boot raid1 with only one disk
https://bugs.launchpad.net/bugs/120375
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