Redhat 下多路径问题的解决.doc

Redhat 下多路径问题的解决-IBM RDACIBM, Redhat, RDAC, 路径, 解决远在几周前，寡人就接到了一个任务，解决Redhat下多路径问题。就是从存储-光纤交换机-Server，有一个图可以简单的解释这种情况：首先在Redhat网站找到一个关于多路径的软件，和相关技术说明，如下链接：/docs/manuals/csgfs/browse/4.6/DM_Multipath/index.html事实上，在IBMDS4800-X3650的环境中，这个软件无法正常收敛多路径。经过多次尝试，求教IBM人员，方知需安装一个IBM的软件：RDAC。终于在今天早上得以解决，简单写了个步骤，积累一下：Redhat下多路径解决-IBM RDAC1.到IBM网站下载RDAC软件。软件版本需考虑几个因素：A.存储机器的型号。此处为DS4800，可选在DS4000系列。B.Redhat版本kernel。此处为Linux 2.6.18-8.el5xen #1 SMP Fri Jan 26 14:29:35 EST 2007 x86_64 x86_64 x86_64 GNU/Linux。需具体到2.6.18。在软件下载界面的相关txt文档查找kernel版本。参考链接：/systems/support/supportsite.wss/selectproduct?taskind=2&brandind=5000028&familyind=5329626&typeind=0&modelind=0&osind=0&psid=sr&continue.x=1&matrix=Y#Storage%20Manager2.Down下来之后版本为rdac-LINUX-09.02.C5.13-source.tar.gz上传rdac-LINUX-09.02.C5.13-source.tar.gz到机器上，然后tar zxvf rdac-LINUX-09.02.C5.13-source.tar.gz。目录下会产生linuxrdac-09.02.C5.13文件夹。3.cd/linuxrdac-09.02.C5.13,会看到如下文件:rootKABUSR2 linuxrdac-09.02.C5.13# lsgenfileattributesmppCmn_s2tos3.o mppLnx26p_spinlock_size.cmppLnx26p_vhbalib.o mpp_rcscript.REDHATmppUtilSysdep.ogenuniqueid mppCmn_SysInterface.cmppLnx26p_sysdep.c mppLnx26p_vhbamisc.cmpp_rcscript.SUSE mppVhba.kogenuniqueid.c mppCmn_SysInterface.omppLnx26p_sysdep.o mppLnx26p_vhbamisc.omppSupport mppVhba.mod.chbaCheck mpp.conf mppLnx26p_upper.c mppLnx26p_vhba.o mppUpper.ko mppVhba.mod.oLicense.txt MPP_hba.c mppLnx26p_upper.o mppLnx26p_vhbaproc.cmppUpper.mod.c mppVhba.olsvdev MPP_hba.o mppLnx26p_vhba.c mppLnx26p_vhbaproc.omppUpper.mod.o Readme.txtMakefile mppiscsi_umountall mppLnx26p_vhbaio.c mppLnx26p_vhbatask.cmppUpper.o setupDriver.REDHATModule.symvers mpp_linux_headers mppLnx26p_vhbaio.o mppLnx26p_vhbatask.omppUtil setupDriver.SUSEmppCmn_s2tos3.c mpp_linux_sys_headersmppLnx26p_vhbalib.c mppLnx_Spinlock_SizemppUtil.o utility4.安装：makemake install安装过程时间较长，会产生一个mpp-2.6.18-8.el5xen.img文件。并会有提示必须修改启动列表文件。5.更改启动列表文件：vi /etc/grub.conf 将启动选项指向mpp-2.6.18-8.el5xen.img。为避免因错误无法启动，可以在下面新增一个title:更改前：default=0timeout=5splashimage=(hd0,0)/grub/splash.xpm.gzhiddenmenutitle Red Hat Enterprise Linux Server (2.6.18-8.el5xen) root (hd0,0) kernel /xen.gz-2.6.18-8.el5 module /vmlinuz-2.6.18-8.el5xen ro root=/dev/VolGroup00/LogVol05 rhgb quiet module /initrd-2.6.18-8.el5xen.img更改后：default=1timeout=5splashimage=(hd0,0)/grub/splash.xpm.gzhiddenmenutitle Red Hat Enterprise Linux Server (2.6.18-8.el5xen) root (hd0,0) kernel /xen.gz-2.6.18-8.el5 module /vmlinuz-2.6.18-8.el5xen ro root=/dev/VolGroup00/LogVol05 rhgb quiet module /initrd-2.6.18-8.el5xen.imgtitle Red Hat Enterprise Linux Server (2.6.18-8.el5xen) root (hd0,0) kernel /xen.gz-2.6.18-8.el5 module /vmlinuz-2.6.18-8.el5xen ro root=/dev/VolGroup00/LogVol05 rhgb quiet module /mpp-2.6.18-8.el5xen.img按照系统及软件提示，新增一条列表应为：initrd /mpp-2.6.18-8.el5xen.img。实践证明改为module /mpp-2.6.18-8.el5xen.img