IBM DS Storage 在rhel多路径软件 推荐

一.多路径的概念



从上图中可以看RaidA映射给Server的Lun可以通过两条路径（paths）,这时在Server会看到两不同的Lun，事实是同一个Lun，这就需要做多路径聚合，让不同路径的Lun聚合成同一个Lun，这就是多路径的作用。

二.IBM DS在Rhel5或6的多路径软件RDAC
RDAC下载路径：http://www.lsi.com/sep/Pages/rdac/index.aspx#current 下载相应多路径软件，主要看内核版本（uname -a）和位数，但是大版本尽量相同，例如rhel5.5就尽量找5.5的，若是没有相同版本，那么就找内核相同的

三.举例，例如Rhel5.4_64bit，由于以上网站没Rhel5.4_64bit的相版本，最后下载了内核相同的版本，如下：



四.把rdac-LINUX-09.03.0C05.0439-source.tar.gz上传到rhel5的目录下，然后执行解压
[root@localhost ~]# cd /tmp/
[root@localhost tmp]# ls
gconfd-root rdac-LINUX-09.03.0C05.0439-source.tar.gz ssh-hLaPQQ3621
[root@localhost tmp]# tar -zxf rdac-LINUX-09.03.0C05.0251-source.tar.g
[root@localhost tmp]# ls
gconfd-root rdac-LINUX-09.03.0C05.0251-source.tar.gz
linuxrdac-09.03.0C05.0439 ssh-hLaPQQ3621
[root@localhost tmp]# cd linuxrdac-09.03.0C05.0439/
[root@localhost linuxrdac-09.03.0C05.0439]# ls
genfileattributes mppiscsi_umountall mppLnx26p_vhbatask.c
genuniqueid.c mpp_linux_headers mpp_rcscript.REDHAT
hbaCheck mpp_linux_sys_headers mpp_rcscript.SUSE
License.txt mppLnx26p_sysdep.c mppSupport
lsvdev mppLnx26p_upper.c Readme.txt
Makefile mppLnx26p_vhba.c setupDriver.REDHAT
mppCmn_s2tos3.c mppLnx26p_vhbaio.c setupDriver.SUSE
mppCmn_SysInterface.c mppLnx26p_vhbalib.c setupMpp26p.sh
mpp.conf mppLnx26p_vhbamisc.c utility
MPP_hba.c mppLnx26p_vhbaproc.c

五.安装RDAC
解压后大部分都是二进制文件，需要进编译（指令：make）
[root@localhost lmake clean -----清除旧文件与驱动程序模块
[align=left][root@localhost linuxrdac-09.03.0C05.0439]# make
make[1]: Entering directory `/usr/src/kernels/2.6.18-164.el5.img'
CC [M] /tmp/linuxrdac-09.03.0C05.0439/MPP_hba.o
CC [M] /tmp/linuxrdac-09.03.0C05.0439/mppLnx26p_upper.o
CC [M] /tmp/linuxrdac-09.03.0C05.0439/mppLnx26p_sysdep.o
CC [M] /tmp/linuxrdac-09.03.0C05.0439/mppCmn_s2tos3.o
CC [M] /tmp/linuxrdac-09.03.0C05.0439/mppCmn_SysInterface.o
CC [M] /tmp/linuxrdac-09.03.0C05.0439/mppLnx26p_vhbamisc.o
CC [M] /tmp/linuxrdac-09.03.0C05.0439/mppLnx26p_vhbatask.o
CC [M] /tmp/linuxrdac-09.03.0C05.0439/mppLnx26p_vhba.o
CC [M] /tmp/linuxrdac-09.03.0C05.0439/mppLnx26p_vhbaproc.o
CC [M] /tmp/linuxrdac-09.03.0C05.0439/mppLnx26p_vhbalib.o
CC [M] /tmp/linuxrdac-09.03.0C05.0439/mppLnx26p_vhbaio.o
LD [M] /tmp/linuxrdac-09.03.0C05.0439/mppUpper.o
LD [M] /tmp/linuxrdac-09.03.0C05.0439/mppVhba.o
Building modules, stage 2.
MODPOST
CC /tmp/linuxrdac-09.03.0C05.0439/mppUpper.mod.o
LD [M] /tmp/linuxrdac-09.03.0C05.0439/mppUpper.ko
CC /tmp/linuxrdac-09.03.0C05.0439/mppVhba.mod.o
LD [M] /tmp/linuxrdac-09.03.0C05.0439/mppVhba.ko
make[1]: Leaving directory `/usr/src/kernels/2.6.18-164.el5.img'
make[1]: Entering directory `/usr/src/kernels/2.6.18-164.el5.img'
Building modules, stage 2.
MODPOST
make[1]: Leaving directory `/usr/src/kernels/2.6.18-164.el5.img'
gcc -I/tmp/linuxrdac-09.03.0C05.0439 -I/tmp/linuxrdac-09.03.0C05.0439/mpp_linux_headers/ -I/tmp/linuxrdac-09.03.0C05.0439/mpp_linux_sys_headers/ -c ./utility/mppUtil.c -o mppUtil.o
/bin/bash ./genfileattributes bld
gcc -I/tmp/linuxrdac-09.03.0C05.0439 -I/tmp/linuxrdac-09.03.0C05.0439/mpp_linux_headers/ -I/tmp/linuxrdac-09.03.0C05.0439/mpp_linux_sys_headers/ -c ./utility/mppUtil26p_sysdep.c -o mppUtilSysdep.o
gcc mppUtil.o mppUtilSysdep.o -o mppUtil
gcc -o genuniqueid genuniqueid.c[/align]
[align=left]-----如果有报错根据报错修改，此次没报错，还有编译的内容不一样，显示出来的都有所不同
[root@localhost linuxrdac-09.03.0C05.0439]# make install
make[1]: Entering directory `/usr/src/kernels/2.6.18-164.el5.img'
Building modules, stage 2.
MODPOST
make[1]: Leaving directory `/usr/src/kernels/2.6.18-164.el5.img'
make[1]: Entering directory `/usr/src/kernels/2.6.18-164.el5.img'
Building modules, stage 2.
MODPOST
make[1]: Leaving directory `/usr/src/kernels/2.6.18-164.el5.img'
/bin/bash ./genfileattributes bld
gcc -I/tmp/linuxrdac-09.03.0C05.0439 -I/tmp/linuxrdac-09.03.0C05.0439/mpp_linux_headers/ -I/tmp/linuxrdac-09.03.0C05.0439/mpp_linux_sys_headers/ -c ./utility/mppUtil26p_sysdep.c -o mppUtilSysdep.o
gcc mppUtil.o mppUtilSysdep.o -o mppUtil
Checking Host Adapter Configuration...
Detected 1 Emulex Host Adapter Port(s) on the system
Detected 1 LSI Host Adapter Port(s) on the system
Host Adapters from different supported vendors co-exists on your system.
Please wait while we modify the system configuration files.
Your kernel version is 2.6.18-164.el5
Preparing to install MPP driver against this kernel version...
Generating module dependencies...
Creating new MPP initrd image...
You must now edit your boot loader configuration file, /boot/grub/menu.lst, to
add a new boot menu, which uses mpp-2.6.18-164.el5.img as the initrd image.
Now Reboot the system for MPP to take effect.
The new boot menu entry should look something like this (note that it may
vary with different system configuration):[/align]
[align=left] ...[/align]
title Red Hat Linux (2.6.18-164.el5) with MPP support
root (hd0,5)
kernel /vmlinuz-2.6.18-164.el5 ro root=LABEL=RH9
initrd / initrd-2.6.18-164.el5.img

...
MPP driver package has been successfully installed on your system.

------此次已经把驱动程序的安装包成功安装到操作系统上

六.检查生成文件与修改引导镜像
[root@localhost ~]# cd /boot/
[root@localhost boot]# ls
config-2.6.18-164.el5
grub
initrd-2.6.18-164.el5.img
initrd-2.6.18-164.el5kdump.img
lost+found
mpp-2.6.18-164.el5.img
symvers-2.6.18-164.el5.gz
System.map-2.6.18-164.el5
vmlinuz-2.6.18-164.el5

[align=left]修改menu.lst[/align]
[align=left]将/boot/grub/menu.lst 文件做好备份
redhat5.5 所在目录/boot/grub/menu.lst[/align]
[align=left]把menu.lst最后一条目录initrd /initrd-2.6.18-164.el5.img[/align]
[align=left]修改成initrd /mpp-2.6.18-164.el5.img （事实就是把initrd修改成mpp）[/align]
重启rhel服务器，使用fdisk -l 进去查看,此时会把不同路径相同lun的sdn(n=b,c,d......)聚合成一个sdn，还可以使用fdisk /dev/sdn创建分区，使用 mkfs格式化分区