I've created a very simple configuration for iscsitarget (i.e., IET):
Code:
Target iqn.2012-11.com.example.san1:sda
 Lun 0 Path=/dev/drbd7,Type=blockio
 Lun 1 Path=/dev/drbd8,Type=blockio
 Lun 2 Path=/dev/drbd9,Type=blockio
 Lun 3 Path=/dev/drbd10,Type=blockio
Target iqn.2012-11.com.example.san1:sdb
 Lun 0 Path=/dev/drbd107,Type=blockio
However, none of the LUN's appear on the initiator:
Code:
xen1:~ # iscsiadm -m session -P3
iSCSI Transport Class version 2.0-870
version 2.0-872.suse
Target: iqn.2012-11.com.example.san1:sdb
	Current Portal: 192.168.1.1:3260,1
	Persistent Portal: 192.168.1.1:3260,1
		**********
		Interface:
		**********
		Iface Name: default
		Iface Transport: tcp
		Iface Initiatorname: iqn.1996-04.de.suse:01:2441bbdc6224
		Iface IPaddress: 192.168.1.3
		Iface HWaddress: <empty>
		Iface Netdev: <empty>
		SID: 1
		iSCSI Connection State: LOGGED IN
		iSCSI Session State: LOGGED_IN
		Internal iscsid Session State: NO CHANGE
		*********
		Timeouts:
		*********
		Recovery Timeout: 120
		Target Reset Timeout: 30
		LUN Reset Timeout: 30
		Abort Timeout: 15
		*****
		CHAP:
		*****
		username: <empty>
		password: ********
		username_in: <empty>
		password_in: ********
		************************
		Negotiated iSCSI params:
		************************
		HeaderDigest: None
		DataDigest: None
		MaxRecvDataSegmentLength: 262144
		MaxXmitDataSegmentLength: 8192
		FirstBurstLength: 65536
		MaxBurstLength: 262144
		ImmediateData: Yes
		InitialR2T: Yes
		MaxOutstandingR2T: 1
		************************
		Attached SCSI devices:
		************************
		Host Number: 6	State: running
Target: iqn.2012-11.com.example.san1:sda
	Current Portal: 192.168.1.1:3260,1
	Persistent Portal: 192.168.1.1:3260,1
		**********
		Interface:
		**********
		Iface Name: default
		Iface Transport: tcp
		Iface Initiatorname: iqn.1996-04.de.suse:01:2441bbdc6224
		Iface IPaddress: 192.168.1.3
		Iface HWaddress: <empty>
		Iface Netdev: <empty>
		SID: 2
		iSCSI Connection State: LOGGED IN
		iSCSI Session State: LOGGED_IN
		Internal iscsid Session State: NO CHANGE
		*********
		Timeouts:
		*********
		Recovery Timeout: 120
		Target Reset Timeout: 30
		LUN Reset Timeout: 30
		Abort Timeout: 15
		*****
		CHAP:
		*****
		username: <empty>
		password: ********
		username_in: <empty>
		password_in: ********
		************************
		Negotiated iSCSI params:
		************************
		HeaderDigest: None
		DataDigest: None
		MaxRecvDataSegmentLength: 262144
		MaxXmitDataSegmentLength: 8192
		FirstBurstLength: 65536
		MaxBurstLength: 262144
		ImmediateData: Yes
		InitialR2T: Yes
		MaxOutstandingR2T: 1
		************************
		Attached SCSI devices:
		************************
		Host Number: 7	State: running
Why aren't the LUN's visible to the initiator?

Eric P.
Truckee, CA