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2011-12-15 17:13:55
2010-11-24 10:22:46| 分类： 默认分类 | 标签： |字号大中小
1.start/stop multipathd process "service multipathd start/stop"
2.display the multipath topology "multipath -ll" //非常有用的命令。
3.display the multipath debug info "multipath -v3"
4.Scan the HD "fdisk -l"
5.view the FC wwn " cat /sys/class/fc_host/host1/node_name "
下面是举例：
SAccusys_ACS92102_3a095edea90dc919f0da043d118fd8c5dm-0 Accusys,ACS92102
[size=20G][features=1 queue_if_no_path][hwhandler=1 acs]
\_ round-robin 0 [prio=400][active]----//表示当前的正在使用控制器
\_ 1:0:1:0 sdc 8:32 [active][ready]
\_ 1:0:2:0 sdd 8:48 [active][ready]
\_ 2:0:1:0 sdg 8:96 [active][ready]
\_ 2:0:2:0 sdh 8:112 [active][ready] ----//c,d,g,h可以理解为路径
\_ round-robin 0 [prio=0][enabled]-----//备份控制器
\_ 1:0:0:0 sdb 8:16 [active][ghost]
\_ 1:0:3:0 sde 8:64 [active][ghost]
\_ 2:0:0:0 sdf 8:80 [active][ghost]
\_ 2:0:3:0 sdi 8:128 [active][ghost] //
sdc: checker msg is "hp_sw checker reports path is down" //路径出现故障
sdd: checker msg is "hp_sw checker reports path is down" //路径出现故障
sdh: checker msg is "hp_sw checker reports path is down" //路径出现故障
SAccusys_ACS92102_3a095edea90dc919f0da043d118fd8c5dm-0 Accusys,ACS92102
[size=20G][features=1 queue_if_no_path][hwhandler=1 acs]
\_ round-robin 0 [prio=0][enabled] ---- //两个都是enabled状态，一控制器故障，另外一个控制器没有failover。
\_ 1:0:1:0 sdc 8:32 [failed][faulty]
\_ 1:0:2:0 sdd 8:48 [failed][faulty]
\_ 2:0:1:0 sdg 8:96 [failed][faulty]
\_ 2:0:2:0 sdh 8:112 [failed][faulty]
\_ round-robin 0 [prio=0][enabled] ----
\_ 1:0:0:0 sdb 8:16 [active][ghost]
\_ 1:0:3:0 sde 8:64 [active][ghost]
\_ 2:0:0:0 sdf 8:80 [active][ghost]
\_ 2:0:3:0 sdi 8:128 [active][ghost]
SAccusys_ACS92102_3a095edea90dc919f0da043d118fd8c5dm-0 Accusys,ACS92102
[size=20G][features=1 queue_if_no_path][hwhandler=1 acs]
\_ round-robin 0 [prio=200][active]
\_ 1:0:0:0 sdb 8:16 [active][ready]
\_ 1:0:1:0 sdc 8:32 [active][ready]
\_ 2:0:0:0 sdd 8:48 [active][ready]
\_ 2:0:1:0 sde 8:64 [active][ready]
-rwxr--r-- 1 root root 2554 Jun 30 16:26 /etc/init.d/boot.multipath
-rwxr--r-- 1 root root 3700 Jun 30 16:26 /etc/init.d/multipathd
drwxr-xr-x 2 root root 0 Jun 30 16:26 /etc/udev
drwxr-xr-x 2 root root 0 Jun 30 16:26 /etc/udev/rules.d
-rw-r--r-- 1 root root 1185 Jun 30 16:26 /etc/udev/rules.d/71-multipath.rules
-rw-r--r-- 1 root root 262 Jun 30 16:26 /etc/udev/rules.d/72-multipath-compat.rules
-rwxr-xr-x 1 root root 4872 Jun 30 16:26 /sbin/devmap_name
-rwxr-xr-x 1 root root 22824 Jun 30 16:26 /sbin/kpartx
-rwxr-xr-x 1 root root 1114 Jun 30 16:26 /sbin/kpartx_id
-rwxr-xr-x 1 root root 296 Jun 30 16:26 /sbin/mpath_id
-rwxr-xr-x 1 root root 8404 Jun 30 16:26 /sbin/mpath_prio_alua
-rwxr-xr-x 1 root root 7852 Jun 30 16:26 /sbin/mpath_prio_balance_units
-rwxr-xr-x 1 root root 4208 Jun 30 16:26 /sbin/mpath_prio_emc
-rwxr-xr-x 1 root root 5492 Jun 30 16:26 /sbin/mpath_prio_hds_modular
-rwxr-xr-x 1 root root 5984 Jun 30 16:26 /sbin/mpath_prio_netapp
-rwxr-xr-x 1 root root 3284 Jun 30 16:26 /sbin/mpath_prio_random
-rwxr-xr-x 1 root root 4184 Jun 30 16:26 /sbin/mpath_prio_tpc
-rwxr-xr-x 1 root root 121888 Jun 30 16:26 /sbin/multipath
-rwxr-xr-x 1 root root 146996 Jun 30 16:26 /sbin/multipathd
drwxr-xr-x 2 root root 0 Jun 30 16:26 /usr/share/doc/packages/multipath-tools
-rw-r--r-- 1 root root 49 Nov 11 2005 /usr/share/doc/packages/multipath-tools/AUTHOR
-rw-r--r-- 1 root root 25284 Nov 11 2005 /usr/share/doc/packages/multipath-tools/COPYING
-rw-r--r-- 1 root root 195 Jun 30 16:25 /usr/share/doc/packages/multipath-tools/ChangeLog
-rw-r--r-- 1 root root 15 Jun 30 16:25 /usr/share/doc/packages/multipath-tools/README
-rw-r--r-- 1 root root 9238 Jun 30 16:25 /usr/share/doc/packages/multipath-tools/multipath.conf.annotated
-rw-r--r-- 1 root root 1499 Jun 30 16:25 /usr/share/doc/packages/multipath-tools/multipath.conf.synthetic
-rw-r--r-- 1 root root 424 Jun 30 16:26 /usr/share/man/man8/devmap_name.8.gz
-rw-r--r-- 1 root root 544 Jun 30 16:26 /usr/share/man/man8/kpartx.8.gz
-rw-r--r-- 1 root root 2048 Jun 30 16:26 /usr/share/man/man8/mpath_prio_alua.8.gz
-rw-r--r-- 1 root root 979 Jun 30 16:26 /usr/share/man/man8/multipath.8.gz
-rw-r--r-- 1 root root 489 Jun 30 16:26 /usr/share/man/man8/multipathd.8.gz
drwx------ 2 root root 0 Jun 30 16:26 /var/cache/multipath
小技巧存储添加映射或者做了修改，主机不用重新启动的方法
echo 1 > /sys/class/fc_host/host1/issue_lip
echo 1 > /sys/class/fc_host/host2/issue_lip
echo "- - -" > /sys/class/scsi_host/host1/scan
echo "- - -" > /sys/class/scsi_host/host2/scan
1. Stop the multipathd service.
2. Clear old multipath bindings by entering
/sbin/multipath -F
3. Create new multipath bindings by entering
/sbin/multipath -v2 -l
Start the multipathd service. //更改配置文件后需要做上面的操作才可以让配置文件的更改生效。
如果连接一切都正常，但是suse在操作系统下看不到磁盘。这时可能需要重新启动存储系统。
