rhel5挂载为裸设备

方法一、和rhel4相同,但是需要手动添加。

1.添加启动脚本

vi /etc/init.d/rawdevices
#!/bin/bash
#
# rawdevices       This shell script assignes rawdevices to block devices
#
# chkconfig: 345 56 44
# description: This scripts assignes raw devices to block devices \
#              (such as hard drive partitions). This is for the use \
#              of applications such as Oracle. You can set up the \
#              raw device to block device mapping by editing \
#              the file /etc/sysconfig/rawdevices.
#
# config: /etc/sysconfig/rawdevices

[ -f /bin/raw ] || exit 0
[ -f /etc/sysconfig/rawdevices ] || exit 0
# Exit if the file just has the default comments.
LC_ALL=C /bin/egrep -q -v "^ *#" /etc/sysconfig/rawdevices 2>/dev/null || exit 0

. /etc/init.d/functions

function assign_raw()
{
   LC_ALL=C egrep -v '^ *#' /etc/sysconfig/rawdevices |
   while read RAW BLOCK; do
     if [ -n "$RAW" -a -n "$BLOCK" ]; then
         rawdirname=${RAW%/*}
         if [ "$rawdirname" = "/dev" -a -d /dev/raw ]; then
           echo $"  Please correct your /etc/sysconfig/rawdevices:"
           echo $"     rawdevices are now located in the directory /dev/raw/ "
           echo $"  If the command 'raw' still refers to /dev/raw as a file."
           echo $"   you'll have to upgrade your util-linux package"
           exit 0
         fi
         if [ "$rawdirname" = "/dev/raw" -a -f /dev/raw ]; then
           echo $"  Please correct your /etc/sysconfig/rawdevices:"
           echo $"     rawdevices are now located in the directory /dev/raw/ "
           echo $"  If the command 'raw' still refers to /dev/raw as a file."
           echo $"   you'll have to upgrade your util-linux package"
           exit 0
         fi

       echo "           $RAW  -->   $BLOCK";
       raw $RAW $BLOCK
     fi
   done
}

# See how we were called.
case "$1" in
  start)
        # Assign devices
        echo $"Assigning devices: "
        assign_raw
        echo $"done"
        ;;
  stop)
        # No action to be taken here
        ;;

  status)
        ID=`id -u`
        if [ $ID -eq 0 ]; then
          raw -qa
        else
          echo $"You need to be root to use this command ! "
        fi
        ;;

  restart|reload)
        $0 start
        ;;

  *)
        echo $"Usage: $0 {start|stop|status|restart}"
        exit 1
esac

exit 0

以上部分使用multipath也可以代替。

2.指定

[root@rac1 ~]# cat /etc/sysconfig/rawdevices
/dev/raw/raw1   /dev/iscsi/rac_storage_1/part1
/dev/raw/raw2   /dev/iscsi/rac_storage_2/part1

3.添加到开机启动

[root@rac1 ~]#chkconfig --add rawdevices

4.重新启动 OK

方法二、rhel5推荐的正规方法

1.添加规则

[root@rac1 ~]# cat /etc/udev/rules.d/60-raw.rules
ACTION=="add", KERNEL=="sda", RUN+="/bin/raw /dev/raw/raw1 %N"

2.重启机器或 start_udev ,OK!