在linux和Windows下配置HP FC存储设备多路径驱动

主机安装HBA卡驱动，一般光纤卡的厂家就是QLogic和Emulex的。

Linux下查看光纤卡驱动模块是否加载通过

lsmod |grep qla2xxx #查看是否加载了QLogic的光纤卡模块
lsmod |grep lpfc #查看是否加载了Emulex的光纤卡模块
modprobe lpfc  #加载相应的光纤卡模块

Windows下查看设备管理器查看是否加载了驱动（如果没有的话安装相应的光纤卡驱动）。

2. 查看光纤卡的WWN号（记录下来为存储设备映射时使用）
Linux

more /sys/class/fc_host/host1/node_name #根据光纤卡端口的数量可能会有host1，host2等。

Windows

wmic /namespace:\\root\wmi path MSFC_FCAdapterHBAAttributes get /value #查看PortWWN号码，是10进制的，需要转换到16进制（其实一般只需要把最后的号码转换一下，在存储设备中能够识别出来是那台主机即可）

3. 存储设备映射卷到主机
FC存储设备是通过WWN号来识别主机的，此处把划出来的卷分配给相应主机的WWN号码即可。

4. 安装多路径软件
Linux

yum list |grep device-mapper          #查找多路径包
yum install device-mapper-multipath   #CentOS下安装多路径软件

suse 通过yast或zypper安装，Ubuntu 通过 apt-get安装。两个包：device-mapper和device-mapper-multipath包。搜索一下安装这两个包，名字各版本可能有差别。
Windows 2008以上
服务器管理--功能--添加功能--选择Multipath IO包安装。然后选择管理员工具-MPIO--发现多路径选项卡--添加即可，重启后即可看到效果。

5. Linux多路径配置文件
centos 5.x
修改/etc/multipath.conf

defaults {
udev_dir		/dev
polling_interval	10
selector		"round-robin 0"
path_grouping_policy	failover
getuid_callout		"/sbin/scsi_id -g -u -s /block/%n"
prio_callout		"/bin/true"
path_checker		tur
rr_min_io		100
rr_weight       	uniform
failback		immediate
no_path_retry		12
user_friendly_names	yes
}

blacklist {
devnode		"^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode 	"^hd[a-z][[0-9]*]"
}

devices {

device {
vendor			"HP|COMPAQ"
product 		"HSV1[01]1 \(C\)COMPAQ|HSV2[01]0|HSV300|HSV4[05]0"
path_grouping_policy	group_by_prio
getuid_callout		"/sbin/scsi_id -g -u -s /block/%n"
path_checker		tur
path_selector		"round-robin 0"
prio_callout		"/sbin/mpath_prio_alua /dev/%n"
rr_weight		uniform
failback		immediate
hardware_handler	"0"
no_path_retry		18
rr_min_io		100
}

device {
vendor                  "HP"
product                 "P2000 G3 FC|P2000G3 FC/iSCSI"
path_grouping_policy    group_by_prio
getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
path_checker            tur
path_selector           "round-robin 0"
prio_callout            "/sbin/mpath_prio_alua /dev/%n"
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor			"HP"
product			"OPEN-.*"
path_grouping_policy	multibus
getuid_callout		"/sbin/scsi_id -g -u -s /block/%n"
path_selector		"round-robin 0"
rr_weight		uniform
path_checker		tur
hardware_handler	"0"
failback		immediate
no_path_retry		18
rr_min_io		1000
}

device {
vendor                  "HP"
product                 "MSA VOLUME*"
path_grouping_policy    group_by_prio
getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
path_checker            tur
path_selector           "round-robin 0"
prio_callout            "/sbin/mpath_prio_alua /dev/%n"
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor                  "HP"
product                 "MSA2012sa|MSA2312sa|MSA2324sa"
path_grouping_policy    group_by_prio
getuid_callout          "/sbin/hp_scsi_id -g -u -n -s /block/%n"
path_checker            tur
path_selector           "round-robin 0"
prio_callout            "/sbin/mpath_prio_alua %d"
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor                  "HP"
product                 "MSA2312fc|MSA2324fc|MSA2312i|MSA2324i"
path_grouping_policy    group_by_prio
getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
path_checker            tur
path_selector           "round-robin 0"
prio_callout            "/sbin/mpath_prio_alua /dev/%n"
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor			"HP"
product			"MSA2[02]12fc|MSA2012i"
path_grouping_policy	multibus
getuid_callout		"/sbin/scsi_id -g -u -s /block/%n"
path_selector		"round-robin 0"
rr_weight		uniform
path_checker		tur
hardware_handler	"0"
failback		immediate
no_path_retry		18
rr_min_io		100
}

}

centos 6.x-7.0

mpathconf --enable --with_multipathd y #简化了配置，同样也可以使用5.x的配置文件

suse

defaults {
udev_dir		/dev
polling_interval	10
selector		"round-robin 0"
path_grouping_policy	failover
getuid_callout		"/lib/udev/scsi_id -g -u /dev/%n"
prio			const
path_checker		tur
rr_min_io		100
rr_weight       	uniform
failback		immediate
no_path_retry		12
user_friendly_names	yes
}

blacklist {
devnode		"^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode 	"^hd[a-z][[0-9]*]"
}

devices {

device {
vendor			"HP|COMPAQ"
product			"HSV1[01]1 \(C\)COMPAQ|HSV2[01]0|HSV300|HSV4[05]0"
path_grouping_policy	group_by_prio
getuid_callout          "/lib/udev/scsi_id -g -u /dev/%n"
path_checker		tur
path_selector		"round-robin 0"
prio			alua
rr_weight		uniform
failback		immediate
hardware_handler	"0"
no_path_retry		18
rr_min_io		100
}

device {
vendor                  "HP"
product                 "P2000 G3 FC|P2000G3 FC/iSCSI"
path_grouping_policy    group_by_prio
getuid_callout          "/lib/udev/scsi_id -g -u /dev/%n"
path_checker            tur
path_selector           "round-robin 0"
prio                    alua
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor			"HP"
product			"OPEN-.*"
path_grouping_policy	multibus
getuid_callout          "/lib/udev/scsi_id -g -u /dev/%n"
path_selector		"round-robin 0"
rr_weight		uniform
path_checker		tur
hardware_handler	"0"
failback		immediate
no_path_retry		18
rr_min_io		1000
}

device {
vendor                  "HP"
product                 "MSA VOLUME*"
path_grouping_policy    group_by_prio
getuid_callout          "/lib/udev/scsi_id -g -u /dev/%n"
path_checker            tur
path_selector           "round-robin 0"
prio			alua
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor                  "HP"
product                 "MSA2312fc|MSA2324fc|MSA2312i|MSA2324i|MSA2012sa|MSA2312sa|MSA2324sa|MSA2000s VOLUME"
path_grouping_policy    group_by_prio
getuid_callout          "/lib/udev/scsi_id -g -u /dev/%n"
path_checker            tur
path_selector           "round-robin 0"
prio                    alua
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor			"HP"
product			"MSA2[02]12fc|MSA2012i"
path_grouping_policy	multibus
getuid_callout          "/lib/udev/scsi_id -g -u /dev/%n"
path_selector		"round-robin 0"
rr_weight		uniform
path_checker		tur
hardware_handler	"0"
failback		immediate
no_path_retry		18
rr_min_io		100
}

}

ubuntu

defaults {
udev_dir                /dev
polling_interval        10
selector                "round-robin 0"
path_grouping_policy    failover
getuid_callout          "/lib/udev/scsi_id -g -u /block/%n"
prio_callout            "/bin/true"
path_checker            tur
rr_min_io               100
rr_weight               uniform
failback                immediate
no_path_retry           12
user_friendly_names     yes
}

blacklist {
devnode         "^(ram|raw|loop|fd|md|dm-|sr|scd|st|sda)[0-9]*"
devnode         "^hd[a-z][[0-9]*]"
devnode         "^cciss!c[0-9]d[0-9]*"
}

devices {

device {
vendor                  "HP|COMPAQ"
product                 "HSV1[01]1 \(C\)COMPAQ|HSV2[01]0|HSV3[046]0|HSV4[05]0"
path_grouping_policy    group_by_prio
getuid_callout          "/lib/udev/scsi_id -g -u /block/%n"
path_checker            tur
path_selector           "round-robin 0"
prio_callout            "mpath_prio_alua /dev/%n"
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor                  "HP"
product                 "P2000 G3 FC|P2000G3 FC/iSCSI"
path_grouping_policy    group_by_prio
getuid_callout          "/lib/udev/scsi_id -g -u /block/%n"
path_checker            tur
path_selector           "round-robin 0"
prio_callout            "mpath_prio_alua /dev/%n"
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor                  "HP"
product                 "OPEN-.*"
path_grouping_policy    multibus
getuid_callout          "/lib/udev/scsi_id -g -u /block/%n"
path_selector           "round-robin 0"
rr_weight               uniform
path_checker            tur
hardware_handler        "0"
failback                immediate
no_path_retry           18
rr_min_io               1000
}

device {
vendor                  "HP"
product                 "MSA VOLUME*"
path_grouping_policy    group_by_prio
getuid_callout          "/lib/udev/scsi_id -g -u /block/%n"
path_checker            tur
path_selector           "round-robin 0"
prio_callout            "mpath_prio_alua /dev/%n"
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor                  "HP"
product                 "MSA2012sa|MSA2312sa|MSA2324sa"
path_grouping_policy    group_by_prio
getuid_callout          "/lib/udev/hp_scsi_id -g -u -n /block/%n"
path_checker            tur
path_selector           "round-robin 0"
prio_callout            "mpath_prio_alua %d"
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor                  "HP"
product                 "MSA2312fc|MSA2324fc|MSA2312i|MSA2324i"
path_grouping_policy    group_by_prio
getuid_callout          "/lib/udev/scsi_id -g -u /block/%n"
path_checker            tur
path_selector           "round-robin 0"
prio_callout            "mpath_prio_alua /dev/%n"
rr_weight               uniform
failback                immediate
hardware_handler        "0"
no_path_retry           18
rr_min_io               100
}

device {
vendor                  "HP"
product                 "MSA2[02]12fc|MSA2012i"
path_grouping_policy    multibus
getuid_callout          "/lib/udev/scsi_id -g -u /block/%n"
path_selector           "round-robin 0"
rr_weight               uniform
path_checker            tur
hardware_handler        "0"
failback                immediate
no_path_retry           18
rr_min_io               100
}

}

其实各Linux发行版都是使用Redhat开发的multipath包，只是有些命令的位置不同而已。修改一下就可以适用与各linux系统。
具体的配置参数信息请参考：
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/

6. Linux 配置多路径命令
centos 5.x

chkconfig --list|grep multipathd #查看多路径服务是否开机启动
chkconfig multipathd on #开机打开多路径服务
service multipathd start #打开多路径服务
multipath  #配置多路径 -vn n为数字，可以显示更多信息
multipath -ll #查看多路径设备和信息

其他

multipath
multipath -ll

在启用了user_friendly_names配置后设备名为 /dev/mapper/mpathn,其中n为字母，这个是在系统启动时就已经创建的，可以直接使用。不要直接操作 /dev/dm-n（内部使用） 或是 /dev/mpath/mpathn（udev创建，启动中无法使用），因为它们为系统所使用。

7. 排错

multipathd -k #进入交互模式，具体请查看 man multipathd
>list|show config
>reconfigure
>list|show path

小技巧：当存储添加了新的映射时，我们可以使用下面的命令让系统重新识别设备而无需重启。

echo 1 >/sys/class/fc_host/host0/issue_lip
echo 1 >/sys/class/fc_host/host1/issue_lip
echo "- - -" >/sys/class/scsi_host/host0/scan
echo "- - -" >/sys/class/scsi_host/host1/scan

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