创建ASM磁盘组

ASM磁盘组是作为一个逻辑单元管理的一个ASM磁盘池。与其他任何LVM一样，ASM管理大量物理卷并将其作为一个或多个逻辑卷呈交给Oracle。物理卷可以是实际的磁盘或磁盘的分区，或者是隶属操作系统的卷管理器的卷。无论采用哪种方式，都不能使用任何文件系统格式化，必须是裸设备。在Linux上，ASM能引用磁盘作为裸设备，或通过使用ASMLib软件。直接使用裸设备的方法：
1. 在RHEL6以前的可以直接通过rawdevices的管理方法，系统安装后默认已存在/etc/init.d/rawdevices和/etc/sysconfig/rawdevices这两个文件。# cat /etc/RedHat-releaseRed Hat Enterprise Linux Server release 5.8 （Tikanga）# rpm -qf /etc/init.d/rawdevices /etc/sysconfig/rawdevicesinitscripts-8.45.42-1.el5initscripts-8.45.42-1.el5# cat /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/functionsfunction 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#添加以下两行（默认不存在），即默认情况下生成的裸设备为root所有，#所以必须修改属主，否则oracle用户无法使用裸设备 sleep 5 chown -R oracle:oinstall /dev/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 1esacexit 0------------------------------------------------------
# vi /etc/sysconfig/rawdevices //映射将要绑定的裸设备/dev/raw/raw10 /dev/sda10/dev/raw/raw11 /dev/sda11/dev/raw/raw12 /dev/sda12/dev/raw/raw13 /dev/sda13/dev/raw/raw14 /dev/sda14# chkconfig rawdevices on# service rawdevices startAssigning devices: /dev/raw/raw10 --> /dev/sda10/dev/raw/raw10: bound to major 8, minor 10 /dev/raw/raw11 --> /dev/sda11/dev/raw/raw11: bound to major 8, minor 11 /dev/raw/raw12 --> /dev/sda12/dev/raw/raw12: bound to major 8, minor 12 /dev/raw/raw13 --> /dev/sda13/dev/raw/raw13: bound to major 8, minor 13 /dev/raw/raw14 --> /dev/sda14/dev/raw/raw14: bound to major 8, minor 14done# ls -l /dev/raw/total 0crw-rw----. 1 oracle oinstall 162, 10 May 27 08:37 raw10crw-rw----. 1 oracle oinstall 162, 11 May 27 08:37 raw11crw-rw----. 1 oracle oinstall 162, 12 May 27 08:37 raw12crw-rw----. 1 oracle oinstall 162, 13 May 27 08:37 raw13crw-rw----. 1 oracle oinstall 162, 14 May 27 08:37 raw14crw-rw----. 1 oracle oinstall 162, 0 May 27 08:19 rawctl# raw -qa/dev/raw/raw10: bound to major 8, minor 10/dev/raw/raw11: bound to major 8, minor 11/dev/raw/raw12: bound to major 8, minor 12/dev/raw/raw13: bound to major 8, minor 13/dev/raw/raw14: bound to major 8, minor 14

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