iSCSI技术是一种由IBM公司研究开发的，是一个供硬件设备使用的可以在IP协议的上层运行的SCSI指令集，这种指令集合可以实现在IP网络上运行SCSI协议，使其能够在诸如高速千兆以太网上进行路由选择。iSCSI技术是一种新储存技术，该技术是将现有SCSI接口与以太网络(Ethernet)技术结合，使服务器可与使用IP网络的储存装置互相交换资料。
1.[root@localhost ~]#yum -y install scsi-target-utils //安装服务端target包。
Dependencies Resolved
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
scsi-target-utils i686 1.0.24-2.el6 base 166 k
Installing for dependencies:
libibverbs i686 1.1.6-4.el6 base 45 k
librdmacm i686 1.0.15-2.el6 updates 29 k
lsof i686 4.82-4.el6 base 315 k
perl i686 4:5.10.1-127.el6 base 9.7 M
perl-Config-General noarch 2.44-1.el6 base 68 k
perl-Module-Pluggable i686 1:3.90-127.el6 base 38 k
perl-Pod-Escapes i686 1:1.04-127.el6 base 30 k
perl-Pod-Simple i686 1:3.13-127.el6 base 210 k
perl-libs i686 4:5.10.1-127.el6 base 591 k
perl-version i686 3:0.77-127.el6 base 49 k
sg3_utils i686 1.28-4.el6 base 471 k
sg3_utils-libs i686 1.28-4.el6 base 50 k
Transaction Summary
2.[root@localhost ~]# chkconfig tgtd on //tgtd开机启动
3.[root@localhost ~]# service tgtd start //启动tgtd服务
Starting SCSI target daemon: [ OK ]
4.[root@localhost ~]# fdisk /dev/sdb //添加一块硬盘fdisk命令创建一个sdb1 20g 分区，或者在文件系统上创建一个镜像文件。
5.[root@localhost /]# mkdir -p /home/zh888 //创建zh888目录
[root@localhost /]# dd if=/dev/zero of=/home/zh888/zh888.img bs=1M count=1000 //创建一个zh888.img镜像文件
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 6.81786 s, 154 MB/s
6.[root@localhost /]# restorecon -R /home/zh888/
7.[root@localhost /]# ll -Z /home/zh888
-rw-r--r-- root root ? zh888.img
8.[root@localhost tgt]# cat /etc/tgt/targets.conf
default-driver iscsi
<target iqn.2012-02.com.example:server.target1>
backing-store /dev/sdb1 #share
backing-store /var/lib/tgtd/virtualization/virtimage.img #share2
write-cache on
</target>
<target zh888.com:server.target2>
backing-store /home/zh888/zh888.img
write-cache on
</target>
9.[root@localhost ~]# tgt-admin --show
Target 1: iqn.2012-02.com.example:server.target1
System information:
Driver: iscsi
State: ready
I_T nexus information:
I_T nexus: 2
Initiator: iqn.1991-05.com.microsoft:-7eec9485
Connection: 1
IP Address: 192.168.xx.xx
LUN information:
LUN: 0
Type: controller
SCSI ID: IET 00010000
SCSI SN: beaf10
Size: 0 MB, Block size: 1
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: null
Backing store path: None
Backing store flags:
LUN: 1
Type: disk
SCSI ID: IET 00010001
SCSI SN: beaf11
Size: 21468 MB, Block size: 512
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: rdwr
Backing store path: /dev/sdb1
Backing store flags:
LUN: 2
Type: disk
SCSI ID: IET 00010002
SCSI SN: beaf12
Size: 524 MB, Block size: 512
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: rdwr
Backing store path: /var/lib/tgtd/virtualization/virtimage.img
Backing store flags:
Account information:
ACL information:
ALL
Target 2: zh888.com:server.target2
System information:
Driver: iscsi
State: ready
I_T nexus information:
I_T nexus: 1
Initiator: iqn.1991-05.com.microsoft-7eec9485
Connection: 1
IP Address: 192.168.xx.xx
LUN information:
LUN: 0
Type: controller
SCSI ID: IET 00020000
SCSI SN: beaf20
Size: 0 MB, Block size: 1
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: null
Backing store path: None
Backing store flags:
LUN: 1
Type: disk
SCSI ID: IET 00020001
SCSI SN: beaf21
Size: 1049 MB, Block size: 512
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: rdwr
Backing store path: /home/zh888/zh888.img
Backing store flags:
Account information:
ACL information:
ALL
10.客户端xp的连接，输入服务器的ip地址。
11.targets目标如下：
12.磁盘管理就会看到未知磁盘1g
13.初始化zh888.img磁盘1g的磁盘如下：
14.磁盘初始化好未指派状态
15.磁盘格式化好之后属性
16.磁盘管理如下
遇到的问题：刚开始tgtd启动不了原因selinux的原因。
本文转自zh888 51CTO博客，原文链接：http://blog.51cto.com/zh888/1059165，如需转载请自行联系原作者
