Centos 6.0安装ISCSI总结

     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。