IBM V系列存储配置linux多路径

迈不过友情╰ 2023-10-08 09:36 13阅读 0赞

一、主要操作步骤：

1、查看主机上光纤卡的WWN

\[root@was1 host2\]\# pwd

/sys/class/fc\_host/host2

\[root@was1 host2\]\# cat /sys/class/fc\_host/host\*/port\_name

0x5001438006342f80

2、在存储上进行mapping

3、在存储上查看是否能看到该HBA卡的WWN，也可重新扫描设备

\[root@was2 host2\]\# cd /sys/class/scsi\_host/host2

\[root@was2 host2\]\# echo "- - -" >./scan

echo "- - -" >./sys/class/scsi\_host/host7/scan

4、可以看到认到盘了

fdisk -l

二、注意点

v7000使用Linux device-mapper multipathing driver作为多路径软件

启用步骤：

1.service multipathd stop

2.修改/etc/multipath.conf

备份该文件cp /etc/multipath.conf /etc/bak.multipath.conf

blacklist \{

\# 黑名单，就是禁止哪些设备使用multipathing driver

\# 默认情况下所以的设备都在multipath的黑名单中，所以即使启动了multipathd服务并加在了内核模块，multipath也不会对链路进行聚合，必须进行修改

\# 可以按照wwid逐一加入，也可以使用devnode的方式按照规律批量加入

wwid 1HITACHI\_D60055750023

wwid 1HITACHI\_D60055750028

devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)\[0-9\]\*"

devnode "^hd\[a-z\]"

defaults \{

\# 默认情况下multipath生成dm设备之后，会同时在/dev/mapper/下生成以磁盘wwid为名的符号链接指向对应的dm设备。

\# 如果想生成 mpath设备，则需要打开user\_friendly\_names选项

polling\_interval 30

failback immediate

no\_path\_retry 5

rr\_min\_io 100

path\_checker tur

user\_friendly\_names yes

devices \{

\# Storwize V7000 -->其实应该是SVC，因为2145是SVC的ID，V7000的ID是2076

\# Note: If you are using RHEL6 or SUSE Linux Enterprise Server 10 Service Pack 2,

\# use prio "alua" instead of prio\_callout "/sbin/mpath\_prio\_alua /dev/%n" to disable

\# the Using deprecated prio\_callout message. This value disables only the error message

\# and does not affect operations. If prio\_callout "/sbin/mpath\_prio\_alua /dev/%n" is set

\# on SUSE Linux Enterprise Server 10 Service Pack 2, the Using deprecated prio\_callout message

\# is issued for all devices when the multipath command is used.

\# 具体可参考information center

device \{

vendor "IBM"  
product "2145"  
path\_grouping\_policy "group\_by\_prio"  
path\_selector "service-time 0" \# Used by Red Hat 7.x  
prio "alua"  
path\_checker "tur"  
failback "immediate"  
no\_path\_retry 5  
rr\_weight uniform  
rr\_min\_io\_rq "1"  
dev\_loss\_tmo 120

multipaths \{

\#可以给multipaths取别名，这样用multipath –ll看到的就是自己取的名字了，可以用此办法避免mpath混乱，固定名字，尤其在做双机的时候

multipath \{

wwid 360050768028081d5d80000000000000f

alias nectest01

multipath \{

wwid 360050768028081d5d800000000000010

alias nectest02

multipath \{

wwid 360050768028081d5d800000000000011

alias nectest03

multipath \{