Root RAID HOWTO cookbook

13. Appendix F. - rc.raidown

Copy the following text into the script file rc.raidown and save it in /etc/rc.d.

#! /bin/sh
#
# rc.raidown    This file is executed by init when it goes into runlevel
#               0 (halt) or runlevel 6 (reboot). It saves the status of
#               a root mounted raid array for subsequent re-boot
#
# Version:      1.08    3-25-98 Michael A. Robinton < michael at bizsystems.com >
#
############ Save raid boot and status info ##############
if [ -f /etc/raidboot.conf ]
then
  {
  read RaidBootDevs
  read RaidStatusPath
  read RaidConfigEtc
  } < /etc/raidboot.conf

# you must have issued
#       cat /proc/mdstat | grep md0 >
#               {your boot vol mnt(s)}/{RaidStatusPath}/raidgood.ref
# before linuxrc will execute properly with this info
#
#       capture raid status
  RAIDSTATUS=`/bin/cat /proc/mdstat | /usr/bin/grep md0`
  mkdir /tmp/raid$$
  echo "Writing RAID read-only boot FLAG(s)."
  for Device in ${RaidBootDevs}
  do
# get mount point for raid boot device or use tmp
    RBmount=$( cat /proc/mounts | /usr/bin/grep ${Device} )
    if [ -n ${RBmounts} ]; then
      RBmount=$( echo ${RBmount} | cut -f 2 -d ' ' )
    else
      RBmount="/tmp/raid$$"
      mount ${Device} ${RBmount}
    fi
  if [ -d ${RBmount}/${RaidStatusPath} ]; then
# Create raid mounted RO flag = shutdown status of raid array
    echo ${RAIDSTATUS} > ${RBmount}/${RaidStatusPath}/raidboot.ro
# Don't propagate 'fstab' from ramdisk
    if [ -f /linuxrc ]; then
      FSTAB=
    else
      FSTAB=fstab
    fi
    pushd /etc
# Save etc files for rescue system
    /bin/tar --ignore-failed-read \
        -cf ${RBmount}/${RaidStatusPath}/raidboot.etc \
        raid*.conf mdtab* ${FSTAB} lilo.conf
    popd
# Create new raidboot.cfg
    {
    /bin/echo ${RaidBootDevs}
    /bin/echo ${RaidStatusPath}
    /bin/echo ${RaidConfigEtc}
    } > ${RBmount}/${RaidStatusPath}/raidboot.cfg
    /bin/umount ${RBmount}
  fi
  done
  rmdir /tmp/raid$$
  echo "Raid boot armed"
fi
################## end raid boot #########################