fdisk查看磁盘
[root@db11g ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.9 (Tikanga) [root@db11g ~]# [root@db11g ~]# [root@db11g ~]# fdisk -l Disk /dev/sda: 32.2 GB, 32212254720 bytes 255 heads, 63 sectors/track, 3916 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 3916 31350847+ 8e Linux LVM Disk /dev/sdb: 17.1 GB, 17179869184 bytes 255 heads, 63 sectors/track, 2088 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk /dev/sdb doesn‘t contain a valid partition table Disk /dev/sdc: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk /dev/sdc doesn‘t contain a valid partition table
获取scsi id
[root@db11g ~]# /sbin/scsi_id -g -u -s /block/sdb SATA_VBOX_HARDDISK_VB3c0bb909-10aab3a0_ [root@db11g ~]# /sbin/scsi_id -g -u -s /block/sdc SATA_VBOX_HARDDISK_VB3edd7dc1-fd831bf4_在RHEL6下使用以下命令
scsi_id --whitelisted --replace-whitespace –-device=/dev/sdb
安装multipath rpm包
[root@db11g ~]# yum install device-mapper* Loaded plugins: rhnplugin, security This system is not registered with ULN. You can use up2date --register to register. ULN support will be disabled. Setting up Install Process Package device-mapper-multipath-0.4.9-56.0.3.el5.x86_64 already installed and latest version Package device-mapper-multipath-libs-0.4.9-56.0.3.el5.x86_64 already installed and latest version Package device-mapper-event-1.02.67-2.el5.x86_64 already installed and latest version Package device-mapper-1.02.67-2.el5.x86_64 already installed and latest version Package device-mapper-1.02.67-2.el5.i386 already installed and latest version Nothing to do [root@db11g ~]# [root@db11g ~]# [root@db11g ~]# [root@db11g ~]# [root@db11g ~]# rpm -qa|grep device-mapper device-mapper-multipath-libs-0.4.9-56.0.3.el5 device-mapper-event-1.02.67-2.el5 device-mapper-1.02.67-2.el5 device-mapper-1.02.67-2.el5 device-mapper-multipath-0.4.9-56.0.3.el5
获取grid用户的uid和gid，这里的gid是asmadmin组的gid
[root@db11g ~]# cat /etc/passwd|grep grid grid:x:1100:1000:Grid Infrastructure Owner:/home/grid:/bin/bash [root@db11g ~]# cat /etc/group|grep asmadmin asmadmin:x:1200:grid,oracle [root@db11g ~]# id -a grid uid=1100(grid) gid=1000(oinstall) groups=1000(oinstall),1200(asmadmin),1201(asmdba),1202(asmoper),1300(dba)
配置/etc/multipath.conf
[root@db11g ~]# cp /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf /etc/
[root@db11g ~]# cat /etc/multipath.conf
defaults {
user_friendly_names no
queue_without_daemon no
flush_on_last_del yes
max_fds max
}
blacklist {
devnode "^hd[a-z]"
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^cciss.*"
}
devices {
device {
vendor "OPNFILER "
product "LUN"
path_grouping_policy group_by_prio
features "3 queue_if_no_path pg_init_retries 50"
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
path_checker tur
path_selector "round-robin 0"
hardware_handler "1 alua"
failback immediate
rr_weight uniform
rr_min_io 128
}
}
multipaths {
multipath {
wwid SATA_VBOX_HARDDISK_VB3c0bb909-10aab3a0_
alias datadisk
uid 1100
gid 1200
}
multipath {
wwid SATA_VBOX_HARDDISK_VB3edd7dc1-fd831bf4_
alias fradisk
uid 1100
gid 1200
}
}
启动multipath
[root@db11g ~]# modprobe dm-multipath [root@db11g ~]# modprobe dm-round-robin [root@db11g ~]# chkconfig multipathd start [root@db11g ~]# chkconfig multipathd on [root@db11g ~]# /etc/init.d/multipathd start Starting multipathd daemon: [ OK ] [root@db11g ~]# ps -ef|grep multipathd root 3084 1 0 13:16 ? 00:00:00 /sbin/multipathd root 3186 2877 0 13:16 pts/0 00:00:00 grep multipathd [root@db11g ~]# multipath -F [root@db11g ~]# multipath -v2 Jan 15 13:17:40 | SATA_VBOX_HARDDISK_VBa64c2685-cc2f3dd0_: ignoring map create: datadisk (SATA_VBOX_HARDDISK_VB3c0bb909-10aab3a0_) undef ATA,VBOX HARDDISK size=16G features=‘0‘ hwhandler=‘0‘ wp=undef `-+- policy=‘round-robin 0‘ prio=1 status=undef `- 1:0:0:0 sdb 8:16 undef ready running create: fradisk (SATA_VBOX_HARDDISK_VB3edd7dc1-fd831bf4_) undef ATA,VBOX HARDDISK size=10G features=‘0‘ hwhandler=‘0‘ wp=undef `-+- policy=‘round-robin 0‘ prio=1 status=undef `- 2:0:0:0 sdc 8:32 undef ready running [root@db11g ~]# [root@db11g ~]# multipath -ll fradisk (SATA_VBOX_HARDDISK_VB3edd7dc1-fd831bf4_) dm-3 ATA,VBOX HARDDISK size=10G features=‘0‘ hwhandler=‘0‘ wp=rw `-+- policy=‘round-robin 0‘ prio=1 status=active `- 2:0:0:0 sdc 8:32 active ready running datadisk (SATA_VBOX_HARDDISK_VB3c0bb909-10aab3a0_) dm-2 ATA,VBOX HARDDISK size=16G features=‘0‘ hwhandler=‘0‘ wp=rw `-+- policy=‘round-robin 0‘ prio=1 status=active `- 1:0:0:0 sdb 8:16 active ready running
[root@db11g ~]# ll /dev/mapper/*disk brw-rw---- 1 grid asmadmin 252, 2 Jan 15 13:17 /dev/mapper/datadisk brw-rw---- 1 grid asmadmin 252, 3 Jan 15 13:17 /dev/mapper/fradisk