Red Hat Linux 升级以后 PowerPath 重新安装

Posted by: JiaLiang Liao 14 years, 9 months ago

(0 comments)

最近公司的一台Red Hat Linux频繁出现网络服务非正常停止的情况，重启网络服务后恢复正常。因此怀疑是Red Hat Linux有问题，考虑将系统升级到最新的补丁。

目前操作版本是5.3，最新补丁是5.5,。通过RHN下载补丁，安装并重新启动后，发现挂载的EMC SAN磁盘无法访问，

# powermt display dev=all 
initialization error

# rpm -qa | grep EMCpower
EMCpower.LINUX-5.1.2.00.00-021

因为内核更新了，所以需要安装最新的PowerPath软件。下载最新版本：EMCpower.LINUX-5.3.1.00.00-111.rhel5.x86_64.rpm

# rpm -ivh EMCpower.LINUX-5.3.1.00.00-111.rhel5.x86_64.rpm 
Preparing...                ########################################### [100%]
   1:EMCpower.LINUX         ########################################### [100%]
All trademarks used herein are the property of their respective owners.
NOTE:License registration is not required to manage the CLARiiON AX series array.

然后重新启动服务器。

# /etc/init.d/PowerPath status
Usage: /etc/init.d/PowerPath {start|stop}

# /etc/rc.d/init.d/naviagent status
naviagent (pid 6651) is running...

# powermt display dev=all
PowerPath modules are not loaded.
Ensure that the modules are loaded and try again.

# emcpadm getusedpseudos
<ERROR: unable to determine device major number>

还是无法识别SAN磁盘，查阅资料后看到，手工重新启动PowerPath服务可以解决这个问题。

# /etc/init.d/PowerPath stop
Stopping PowerPath: PowerPath is not running
done

# /etc/init.d/PowerPath start
Starting PowerPath: done

# powermt display dev=all
Pseudo name=emcpowere
CLARiiON ID=FCNCX093400078 [sh-rsync]
Logical device ID=6006016014A02500A2A3A6100FAADE11 [MetaLUN]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=SP B       Array failover mode: 1
==============================================================================
---------------- Host ---------------   - Stor -   -- I/O Path -  -- Stats ---
###  HW Path                I/O Paths    Interf.   Mode    State  Q-IOs Errors
==============================================================================
   3 qla2xxx                   sdb       SP B0     active  alive      0      0
   4 qla2xxx                   sdc       SP A0     active  alive      0      0

查看加载的模块：

[root@DB01 ~]# vi /etc/modprobe.conf
alias scsi_hostadapter megaraid_sas
alias scsi_hostadapter1 ata_piix
alias scsi_hostadapter2 qla2xxx
alias eth0 bnx2
alias eth1 bnx2
alias eth2 bnx2
alias eth3 bnx2
###BEGINPP
include /etc/modprobe.conf.pp
###ENDPP

之前每次重新配置SAN磁盘emcpower后面的字母就改为后一个，目前是/etc/emcpowere，看来是pseudo设备名字没有删除的原因。

# emcpadm getusedpseudos
PowerPath pseudo device names in use:

Pseudo Device Name      Major# Minor#
        emcpowera         120      0
        emcpowerb         120     16
        emcpowerc         120     32
        emcpowerd         120     48
        emcpowere         120     64

• ← AIX C and C++ Runtime
• Nagios NSClient →