suse10sp2多路径multipath配置

先查看多路径是否启动
rcmultipathd status

未启动执行
rcmultipathd start

将如下服务设置为开机自动启动
chkconfig multipathd on
chkconfig boot.multipath on

使用如下命令生成多路径设备
multipath -ll

如果看到了多路径设备数量与LUN数量不符，需按照如下步骤操作：
1、重新扫描LUN设备
rescan-scsi-bus.sh
2、重新生成多路径设备
multipath -F
multipath -v2
3、再查看多路径设备是否与LUN数量相符
multipath -ll
4、如还是不符，执行如下步骤
通过HBA卡扫描底层物理设备
echo 1 > /sys/class/fc_host/host1/issue_lip
echo 1 > /sys/class/fc_host/host2/issue_lip
通过SCSI扫描SCSI设备
echo "- - -" > /sys/class/scsi_host/host1/scan
echo "- - -" > /sys/class/scsi_host/host2/scan
重新生成多路径设备
multipath -F
multipath -v2
查看设备与LUN数量是否相符
multipath -ll
5、如还是不符，需重启操作系统
reboot

etc/sysconfig/kernel
原来为：
INITRD_MODULES="mptsas processor thermal fan reiserfs edd bnx2 e1000 e1000e tg3 usbhid usbcore uhci_hcd ehci_hcd"
修改为：
INITRD_MODULES="mptsas processor thermal fan reiserfs edd bnx2 e1000 e1000e tg3 usbhid usbcore uhci_hcd ehci_hcd scsi_dh_rdac"

修改配置文件中的wwid和alias对应关系：
vi /etc/multipath.conf

defaults {
    polling_interval    30
    failback            immediate
    no_path_retry       5
    rr_min_io           100
    path_checker        tur
    user_friendly_names yes
}

multipaths {
multipath {
wwid 3600507630bffc08a0000000000005009
alias mpatha
path_grouping_policy    group_by_prio
path_selector           "round-robin 0"
failback                immediate
rr_weight               uniform
no_path_retry           18
rr_min_io               100
}
multipath {
wwid 3600507630bffc08a0000000000005008
alias mpathb
path_grouping_policy    group_by_prio
path_selector           "round-robin 0"
failback                immediate
rr_weight               uniform
no_path_retry           18
rr_min_io               100
}
multipath {
wwid 3600507630bffc08a0000000000005106
alias mpathc
path_grouping_policy    group_by_prio
path_selector           "round-robin 0"
failback                immediate
rr_weight               uniform
no_path_retry           18
rr_min_io               100
}
}

 

devices {
# These are the default settings for 2145 (IBM SAN Volume Controller)
# Starting with RHEL5, multipath includes these settings be default
    device {
        vendor                   "IBM"
        product                  "2145"
        path_grouping_policy     group_by_prio
        prio                     "alua"
    }

# These are the default settings for 1750 (IBM DS6000)
# Starting with RHEL5, multipath includes these settings be default
    device {
        vendor                   "IBM"
        product                  "1750500"
        path_grouping_policy     group_by_prio
        prio                     "alua"
    }

# These are the default settings for 2107 (IBM DS8000)
# Uncomment them if needed on this system
    device {
        vendor                   "IBM"
        product                  "2107900"
        path_grouping_policy     group_by_serial
    }

# These are the default settings for 2105 (IBM ESS Model 800)
# Starting with RHEL5, multipath includes these settings be default
    device {
        vendor                   "IBM"
        product                  "2105800"
        path_grouping_policy     group_by_serial
    }
}

 

 

重新生成多路径设备
multipath -F
multipath -v2

查看多路径设备信息
multipath -ll

修改lvm扫描配置
vi /etc/lvm/lvm.conf
    # By default we accept every block device except udev names:
    #filter = [ "r|/dev/.*/by-path/.*|", "r|/dev/.*/by-id/.*|", "a/.*/" ]
    filter = [ "a|/dev/mapper/mpath*|", "r|.*|"]

如果是SUSE10sp2，需要执行：
kpartx -a /dev/mapper/mpathe
SUSE11不需要。

创建VG:

pvcreate /dev/mapper/mpatha
vgcreate sftpvg /dev/mapper/mpatha