create-scsi-target-initiator-dump.txt

Target (Server):
# yum install perl-Config-General
# yum -y install scsi-target-utils*
# service tgtd restart
# chkconfig tgtd on
# tgtadm --lld iscsi --op new --mode target --tid 1 --targetname iqn.2014-09.com.sluo:server.target0
# for i in {1..5}; do dd if=/dev/zero of=/storage-disk$i bs=10M count=1024; done
# tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 1 -b /storage-disk0
# tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 2 -b /storage-disk1
# tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 3 -b /storage-disk3
# tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 4 -b /storage-disk4
# tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 5 -b /storage-disk5
# tgtadm --lld iscsi --op bind --mode target --tid 1 -I ALL
# tgtadm --lld iscsi --mode target --op show

--params readonly=<0|1>
This sets the read-only flag of a LUN. A read-only LUN will refuse any attempts to write data to it.
# tgtadm --lld iscsi --mode logicalunit --op update --tid 1 --lun 1 --params readonly=0
...
# tgtadm --lld iscsi --mode logicalunit --op update --tid 1 --lun 5 --params readonly=0

Initator (Client):
# yum -y install iscsi-initiator-utils
# service iscsi start
# service iscsid start
# chkconfig iscsi on
# chkconfig iscsid on
# vim /etc/iscsi/iscsid.conf
# iscsiadm -m discovery -t sendtargets -p $Server_ip:3260    
# iscsiadm -m node -T iqn.2014-09.com.sluo:server.target0 -p $Server_ip:3260 -l
# iscsiadm -m node -T iqn.2014-09.com.sluo:server.target0 -p $Server_ip:3260 --logout
# .......................................................................... -u    //logout for a specified record

If you want to del the node for good , first you have to logout first.
# iscsiadm -m node -o delete -T iqn.2014-09.com.sluo:server.target0 -p $Server_ip:3260  //del

Dump current tgtd configuration:
# tgt-admin --dump > /etc/tgt/targets.conf

iscsi server and client example:
# cat /etc/tgt/targets.conf 
default-driver iscsi

<target iqn.2014-09.com.sluo:server-disk.target0>
    backing-store /root/sluo-data-disk1
    backing-store /root/sluo-data-disk2
    backing-store /root/sluo-data-disk3
    backing-store /root/sluo-system-disk
    initiator-address 10.66.0.0/24      //allow which client to discover the target
    incominguser redhat redhat          //user name and passwd
</target>

# vim /etc/iscsi/iscsid.conf
# To set a CHAP username and password for initiator
# authentication by the target(s), uncomment the following lines:
node.session.auth.username = redhat
node.session.auth.password = redhat

# To set a discovery session CHAP username and password for the initiator
# authentication by the target(s), uncomment the following lines:
discovery.sendtargets.auth.username = redhat
discovery.sendtargets.auth.password = redhat