Hi all:

I a newbie of iscsi. Now I use two PC to test software iscsi.
My problem is how to fix connect of iscsi target?

The below are the detail:
SAN: iscsi target device  ip: 192.168.3.2
master: iscsi initiator   ip: 192.168.3.124

1. configure on SAN
1)install iscsi-target
[r...@san ~]# yum -y install  scsi-target-utils

2)create two files
[r...@san ~]# dd if=/dev/zero of=/lun/lun1.img bs=1M count=4096
[r...@san ~]# dd if=/dev/zero of=/lun/lun2.img bs=1M count=4096

3)add the content to  /etc/tgt/targets.conf
<target iqn.2009-09.com.test:sa-1:tgtd>
backing-store /lun/lun1.img
initiator-address 192.168.3.124
</target>
<target iqn.2009-09.com.test:sa-2:tgtd>
backing-store /lun/lun2.img
initiator-address 192.168.3.124
</target>

4) restart tgt service
[r...@san tgt]# /etc/init.d/tgtd restart

5) check iscsi target
[r...@san tgt]# tgtadm --op show --mode target
Target 1: iqn.2009-09.com.test:sa-1:tgtd
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
        I_T nexus: 8
            Initiator: iqn.1994-05.com.redhat:155e0ebbe8c
            Connection: 0
                IP Address: 192.168.3.124
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: deadbeaf1:0
            SCSI SN: beaf10
            Size: 0 MB
            Online: Yes
            Removable media: No
            Backing store: No backing store
        LUN: 1
            Type: disk
            SCSI ID: deadbeaf1:1
            SCSI SN: beaf11
            Size: 4295 MB
            Online: Yes
            Removable media: No
            Backing store: /lun/lun1.img
    Account information:
    ACL information:
        192.168.3.124
Target 2: iqn.2009-09.com.test:sa-2:tgtd
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
        I_T nexus: 7
            Initiator: iqn.1994-05.com.redhat:155e0ebbe8c
            Connection: 0
                IP Address: 192.168.3.124
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: deadbeaf2:0
            SCSI SN: beaf20
            Size: 0 MB
            Online: Yes
            Removable media: No
            Backing store: No backing store
        LUN: 1
            Type: disk
            SCSI ID: deadbeaf2:1
            SCSI SN: beaf21
            Size: 4295 MB
            Online: Yes
            Removable media: No
            Backing store: /lun/lun2.img
    Account information:
    ACL information:
        192.168.3.124

2 configure iscsi initiator on master
1) install 
[r...@master ~]# rpm -ql iscsi-initiator-utils

2) discovery iscsi target
[r...@master scsi]# iscsiadm -m discovery -t sendtargets -p 192.168.3.2
192.168.3.2:3260,1 iqn.2009-09.com.test:sa-1:tgtd
192.168.3.2:3260,1 iqn.2009-09.com.test:sa-2:tgtd

3) check
[r...@master scsi]# sfdisk -s
/dev/sda:  78150744
/dev/sdb:   4194304
/dev/sdc:   4194304
total: 86539352 blocks

[r...@master scsi]# fdisk -l

Disk /dev/sdb: 4294 MB, 4294967296 bytes
Disk /dev/sdc: 4294 MB, 4294967296 bytes


My problem is how to setup fix connect on master after reboot?
ex: lun1.img  /dev/sdb  lun2.img  /dev/sdc
if lun1.img does not exist, lun2.img is still /dev/sdc. 
How can I configure it? I should set tgt or initiator?

Thanks!

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