1，check网络
[root@localhost ~]# ping -I eth0 11.110.10.138
PING 11.110.10.138 (11.110.10.138) from 11.110.10.138eth0: 56(84) bytes of data.
64 bytes from 11.110.10.138: icmp_seq=1ttl=64 time=0.023 ms
64 bytes from 11.110.10.138: icmp_seq=2ttl=64 time=0.016 ms
64 bytes from 11.110.10.138: icmp_seq=3ttl=64 time=0.018 ms
^C
--- 11.110.10.138 ping statistics ---
3 packets transmitted, 3 received, 0%packet loss, time 2186ms
rtt min/avg/max/mdev =0.016/0.019/0.023/0.003 ms
[root@localhost ~]#
[root@localhost ~]# ping -I eth0192.168.180.138
PING 192.168.180.138 (192.168.180.138) from11.110.10.138 eth0: 56(84) bytes of data.
From 11.110.10.138 icmp_seq=2 DestinationHost Unreachable
From 11.110.10.138 icmp_seq=3 DestinationHost Unreachable
From 11.110.10.138 icmp_seq=4 DestinationHost Unreachable
^C
--- 192.168.180.138 ping statistics ---
4 packets transmitted, 0 received, +3errors, 100% packet loss, time 3729ms
pipe 3
[root@localhost ~]#
2,检测软件是否已经安装
[root@localhost ~]# rpm -qa |grep iscsi
iscsi-initiator-utils-6.2.0.873-2.0.2.el6.x86_64
[root@localhost ~]#
<版权所有，文章允许转载，但必须以链接方式注明源地址，否则追究法律责任!>
原博客地址： http://blog.csdn.net/mchdba/article/details/46794809
原作者：黄杉 (mchdba)
3,检查ISCSI服务是否启动了和当前级别下的运行情况
[root@localhost ~]# service iscsi status
......
4，要建立2个文件
[root@localhost ~]# iscsiadm -m iface -Iiscsi_eth0 --op=new
New interface iscsi_eth0 added
[root@localhost ~]# iscsiadm -m iface -Iiscsi_eth1 --op=new
New interface iscsi_eth1 added
[root@localhost ~]#
5.建立iscsi_eth0和eht0的映射关系。同时建立iscsi_eth1和eth1的映射关系.
也可以直接编辑iscsi_eth0和iscsi_eth1文件，把里面的iface.net_ifacename=default改成
iface.net_ifacename=eth0和iface.net_ifacename=eth1即可。
[root@localhost ~]# ls/var/lib/iscsi/ifaces/
iscsi_eth0 iscsi_eth1 iscsi_the0 iscsi_the1
[root@localhost ~]# cd/var/lib/iscsi/ifaces/
[root@localhost ifaces]# ll
总用量 16
-rw------- 1 root root 197 6月 10 16:05 iscsi_eth0
-rw------- 1 root root 197 6月 10 16:06 iscsi_eth1
-rw------- 1 root root 197 4月 3 19:14 iscsi_the0
-rw------- 1 root root 197 4月 3 19:14 iscsi_the1
[root@localhost ifaces]# cat iscsi_eth0
# BEGIN RECORD 6.2.0-873.2.el6
iface.iscsi_ifacename = iscsi_eth0
iface.transport_name = tcp
iface.vlan_id = 0
iface.vlan_priority = 0
iface.iface_num = 0
iface.mtu = 0
iface.port = 0
# END RECORD
[root@localhost ifaces]#
[root@localhost ifaces]# iscsiadm -m iface-I iscsi_eth0 --op=update -n iface.net_ifacename -v eth0
iscsi_eth0 updated.
[root@localhost ifaces]# iscsiadm -m iface-I iscsi_eth0 --op=update -n iface.net_ifacename -v eth0
iscsi_eth0 updated.
[root@localhost ifaces]#
6,重启iscsi服务
[root@localhost ifaces]# service iscsi restart
停止 iscsi： [确定]
正在启动 iscsi： [确定]
[root@localhost ifaces]#
Equallogic配置部分
7.配置Equallogic，映射一个Lun名字为redhat,大小3G的空间
在存储访问网站上，去分配新的磁盘块，这个比较简单，就不截图了，存储设备都会自带一个网址让我们访问的。
Redhat配置部分
8.做discover，可以发现已经看到了redhat的lun。因为有两条路径，所有显示了两行。
[root@localhost ifaces]# iscsiadm -mdiscovery -t sendtargets -p 11.110.10.138:3260
iscsiadm: cannot make connection to 11.110.10.138:Connection refused
iscsiadm: cannot make connection to 11.110.10.138:Connection refused
iscsiadm: cannot make connection to 11.110.10.138:Connection refused
iscsiadm: cannot make connection to 11.110.10.138:Connection refused
^Ciscsiadm: caught SIGINT, exiting...
[root@localhost ifaces]#
ip地址是存储的ip地址
[root@localhost ifaces]# iscsiadm -mdiscovery -t sendtargets -p 11.110.10.22 :3260
iscsiadm: This command will remove therecord [iface: default, target:iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata, portal: 11.110.10.22,3260],but a session is using it. Logout session then rerun command to remove record.
iscsiadm: This command will remove therecord [iface: default, target:iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2, portal:11.110.10.22,3260], but a session is using it. Logout session then reruncommand to remove record.
11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata
11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2
11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3
11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata
11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2
11.110.10.22:3260,1 iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3
11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata
11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2
11.110.10.22:3260,1 iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3
11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata
11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2
11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3
[root@localhost ifaces]#
9.Log on所有的iscsi session，可以看到最后两个successful的redhat lun，已经log on成功了。
[root@localhost ifaces]# iscsiadm -m node-l
Logging in to [iface: iscsi_eth1, target:iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata, portal: 11.110.10.22,3260](multiple)
Logging in to [iface: iscsi_eth0, target:iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata, portal: 11.110.10.22,3260](multiple)
Logging in to [iface: iscsi_the1, target:iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata, portal: 11.110.10.22,3260](multiple)
Logging in to [iface: iscsi_the0, target:iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata, portal: 11.110.10.22,3260](multiple)
Logging in to [iface: iscsi_eth1, target:iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2, portal:11.110.10.22,3260] (multiple)
Logging in to [iface: iscsi_eth0, target:iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2, portal:11.110.10.22,3260] (multiple)
Logging in to [iface: iscsi_the1, target:iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2, portal:11.110.10.22,3260] (multiple)
Logging in to [iface: iscsi_the0, target:iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2, portal:11.110.10.22,3260] (multiple)
Logging in to [iface: iscsi_eth1, target:iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3, portal:11.110.10.22,3260] (multiple)
Logging in to [iface: iscsi_eth0, target:iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3, portal:11.110.10.22,3260] (multiple)
Logging in to [iface: iscsi_the1, target:iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3, portal:11.110.10.22,3260] (multiple)
Logging in to [iface: iscsi_the0, target:iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3, portal:11.110.10.22,3260] (multiple)
Login to [iface: iscsi_eth1, target:iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata, portal: 11.110.10.22,3260]successful.
Login to [iface: iscsi_eth0, target:iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata, portal: 11.110.10.22,3260]successful.
Login to [iface: iscsi_the1, target:iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata, portal: 11.110.10.22,3260]successful.
Login to [iface: iscsi_the0, target:iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata, portal: 11.110.10.22,3260]successful.
Login to [iface: iscsi_eth1, target:iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2, portal:11.110.10.22,3260] successful.
Login to [iface: iscsi_eth0, target:iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2, portal:11.110.10.22,3260] successful.
Login to [iface: iscsi_the1, target:iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2, portal:11.110.10.22,3260] successful.
Login to [iface: iscsi_the0, target:iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2, portal:11.110.10.22,3260] successful.
Login to [iface: iscsi_eth1, target:iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3, portal:11.110.10.22,3260] successful.
Login to [iface: iscsi_eth0, target:iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3, portal:11.110.10.22,3260] successful.
Login to [iface: iscsi_the1, target:iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3, portal:11.110.10.22,3260] successful.
Login to [iface: iscsi_the0, target:iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3, portal:11.110.10.22,3260] successful.
[root@localhost ifaces]#
10：输入iscsiadm -m session可以看到当前正在连接的session.
[root@localhost ifaces]# iscsiadm -msession
tcp: [10] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2
tcp: [11] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2
tcp: [12] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2
tcp: [13] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3
tcp: [14] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3
tcp: [15] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3
tcp: [16] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6591f7f09-cf5248cfafa5577e-pddata3
tcp: [3] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata
tcp: [4] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2
tcp: [5] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata
tcp: [6] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata
tcp: [7] 11.110.10.22:3260,1 iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata
tcp: [8] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-6dac38009-c1b1cac2d434efec-pddata
tcp: [9] 11.110.10.22:3260,1iqn.2001-05.com.equallogic:0-8a0906-4061f7f09-29d248cfaed54b9d-pddata2
[root@localhost ifaces]#
配置MPIO
11.因为有多条路径，所有我们需要配置MPIO，查看当前是否安装了MPIO软件。通过查看已经安装了。
[root@localhost ifaces]# rpm -qadevice-mapper
device-mapper-1.02.77-9.el6.x86_64
[root@localhost ifaces]#
[root@localhost ifaces]# chkconfig --listmultipathd
在 multipathd 服务中读取信息时出错：没有那个文件或目录
[root@localhost ifaces]#
12通过查看，MPIO服务在当前级别下没有开，我们启用它。
[root@localhost ifaces]# chkconfig --listmultipathd
multipathd 0:关闭 1:关闭 2:关闭 3:关闭 4:关闭 5:关闭 6:关闭
[root@localhost ifaces]#
[root@localhost ifaces]# chkconfigmultipathd on
[root@localhost ifaces]#
[root@localhost ifaces]#
[root@localhost ifaces]# chkconfig --listmultipathd
multipathd 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
[root@localhost ifaces]#
14.我们需要找到/etc/multipath.conf文件中的如下3行，把前面加上#把他们注释掉。
# Blacklist all devices by default. Removethis to enable multipathing
# on the default devices.
blacklist {
devnode "*"
}
15.重启multipathd服务，通过查看，可以看到我们做的那个3G的LUN信息了。
[root@localhost ifaces]# service multipathd restart
正在关闭multipathd 端口监控程序： [失败]
正在启动守护进程multipathd：/sbin/multipathd: error while loading shared libraries:libsysfs.so.2: cannot open shared object file: No such file or directory
[失败]
[root@localhost ifaces]#
在/etc/ld.so.conf中加一行/usr/local/lib，.然后运行/sbin/ldconfig，文件解决，
[root@localhost ifaces]# find / -namelibsysfs.so.2
[root@localhost ifaces]#
没有此文件，所以yum安装下
[root@localhost ifaces]# yum install -ylibsysfs*
[root@localhost ifaces]# service multipathd restart
正在关闭multipathd 端口监控程序： [失败]
正在启动守护进程multipathd：/sbin/multipathd: error while loading shared libraries:libreadline.so.5: cannot open shared object file: No such file or directory
[失败]
[root@localhost ifaces]#
需要安装 readline-5.2.tar.gz，下载地址为：http://pan.baidu.com/s/1jGnFN3S
安装为
tar-xvf readline-5.2.tar.gz
cdreadline-5.2
./configure
make
makeinstall
[root@localhost ifaces]# yum install -ylibreadline*
去/etc/ld.so.conf添加进lib目录即可
[root@localhost readline-5.2]# cp/etc/ld.so.conf /etc/ld.so.conf.backup
[root@localhost readline-5.2]# vim/etc/ld.so.conf
include ld.so.conf.d/*.conf
/usr/local/lib
[root@localhost readline-5.2]# ldconfig
[root@localhost readline-5.2]#
[root@localhost readline-5.2]#
[root@localhost readline-5.2]# servicemultipathd restart
正在关闭multipathd 端口监控程序： [失败]
正在启动守护进程multipathd： [确定]
[root@localhost readline-5.2]#
[root@localhost readline-5.2]# multipathd-ll
[root@localhost readline-5.2]#
？why？这里没有别的信息呢？为什么没有显示出新分配的那个磁盘的信息呢？
16.继续编辑/etc/multipath.conf,我们给这个3G的LUN起个可以自己命名的名字。
通过multipath –ll,我们可以得到这个3G LUN的WWID: 360c090c2f903ac4a89c2e40000006000
把如图前面的#去掉，同时把wwid改成360c090c2f903ac4a89c2e40000006000。Alias改成 pddata3.
multipaths {
multipath {
wwid 3600508b4000156d700012000000b0000
alias pddata3
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
17.重启multipathd服务，可以看到我们命名的pddata3出来了。
service multipathd restart
why ? 没有看到pddata3
19.格式化 pddata3
[root@localhost readline-5.2]# ls /dev/sdp
/dev/sdp
[root@localhost readline-5.2]#
ext3太土鳖了，所以采用xfs文件格式
[root@localhost readline-5.2]# yum install-y xfsprogs
[root@localhost readline-5.2]# sudo fdisk/dev/sdp
Device contains neither a valid DOSpartition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with diskidentifier 0xd45833b8.
Changes will remain in memory only, untilyou decide to write them.
After that, of course, the previous contentwon't be recoverable.
Warning: invalid flag 0x0000 of partitiontable 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated.It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibilityflag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOSpartition table
p print the partition table
q quit without saving changes
s create a new empty Sundisklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (expertsonly)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-104434, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G}(1-104434, default 104434):
Using default value 104434
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost readline-5.2]#
接下来，格式化分区为XFS，使用mkfs.xfs命令。如果已有其他文件系统创建在此分区，必须加上"-f"参数来覆盖它。
[root@localhost readline-5.2]# sudo mkfs.xfs-f /dev/sdp1
meta-data=/dev/sdp1 isize=256 agcount=4, agsize=52429130 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0
data = bsize=4096 blocks=209716518,imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=102400,version=2
= sectsz=512 sunit=0 blks,lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@localhost readline-5.2]#
18，建立新目录/pddata3，以此挂载新的磁盘
至此你已经准备好格式化后分区来挂载。假设/pddata3 是XFS本地挂载点。使用下述命令挂载：
sudomount -t xfs /dev/sdp1 /pddata3
[root@localhost readline-5.2]# mkdir/pddata3
[root@localhost readline-5.2]# sudo mount -t xfs /dev/sdp1 /pddata2
[root@localhost readline-5.2]#
[root@localhost readline-5.2]# df -h
文件系统 容量 已用 可用 已用%% 挂载点
/dev/mapper/VolGroup-lv_root
50G 33G 15G 70% /
tmpfs 8.9G 3.3G 5.7G 37% /dev/shm
/dev/sda2 485M 76M 384M 17% /boot
/dev/sda1 200M 260K 200M 1% /boot/efi
/dev/mapper/VolGroup-lv_home
76G 50G 22G 70% /home
/dev/sdc 1008G 380G 578G 40% /data
/dev/sdp1 800G 33M 800G 1% /pddata2
[root@localhost readline-5.2]#
参考地址：http://www.jb51.net/LINUXjishu/248321.html