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Configure Storage Server with iSCSI. The storages on networks is called iSCSI Target, Clients which connects to iSCSI Target is called iSCSI Initiator.
This example is based on the environment below.
 
dlp.server.world
[10.0.0.30] - iSCSI Taregt

 
pc01.server.world
[10.0.0.60] - iSCSI Initiator
This example configures to create LVM partition on iSCSI Target, so it need to have enough areas to use. If your iSCSI Target does not have enough areas, add new hard drive.
[1] Create a new LVM partition for storage area.
# create a phisical volume

root@dlp:~#
pvcreate /dev/sdb1

  Physical volume "/dev/sdb1" successfully created
# create a volume group named "vg_target00"

root@dlp:~#
vgcreate -s 32M vg_target00 /dev/sdb1

  Volume group "vg_target00" successfully created
# create a logical volume named "lv_target00"

root@dlp:~#
lvcreate -L 60G -n lv_target00 vg_target00

  Logical volume "lv_target00" created
[2] Configure iSCSI Target
root@dlp:~#
aptitude -y install iscsitarget iscsitarget-dkms
root@dlp:~#
vi /etc/default/iscsitarget
# change

ISCSITARGET_ENABLE=
true
root@dlp:~#
vi /etc/iet/ietd.conf
# add at the last line

# naming rule : [ iqn.yaer-month.domain:any name ]

Target iqn.2014-04.world.server:target00
   
# provided devicce as a iSCSI target

    Lun 0 Path=/dev/vg_target00/lv_target00,Type=blockio
   
# iSCSI Initiator's IP address you allow to connect

    initiator-address 10.0.0.60
   
# authentication info ( set anyone you like for "username", "password" )

    incominguser username password
root@dlp:~#
/etc/init.d/iscsitarget restart

 * Removing iSCSI enterprise target devices:          [ OK ]
 * Starting iSCSI enterprise target service           [ OK ]
                                                      [ OK ]
root@dlp:~#
ietadm --op show --tid=1
# show status

Wthreads=8
Type=0
QueuedCommands=32
NOPInterval=0
NOPTimeout=0
[3]
Complete to configure iSCSI Target. 
 
------------------------------------------------------------------------------------------------------
 
This is an example to create a partition when you add a new hard drive.
root@dlp:~#
fdisk /dev/sdb
# enter operation mode for partitions
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xd70e2fb8.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help):
p
# show partition table
Disk /dev/sdb: 85.9 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders, total 167772160 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xd70e2fb8

   Device Boot      Start         End      Blocks   Id  System
 
# none

Command (m for help):
n
# create a partition

Command action
  e    extended
  p    primary partition (1-4)
Select (default p):
p
# primary

Partition number (1-4):
1
# specify partition number

First sector (2048-167772159, default 2048):  
# starting cylinder

Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-167772159, default 167772159): 
# end cylinder

Using default value 167772159
Command (m for help):
p
# show partition table
Disk /dev/sdb: 85.9 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders, total 167772160 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xd70e2fb8

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   167772159    83885056   83  Linux

Command (m for help):
t
# change type

Selected partition 1
Hex code (type L to list codes):
L
# show list

 0  Empty           24  NEC DOS         81  Minix / old Lin bf  Solaris
 1  FAT12           27  Hidden NTFS Win 82  Linux swap / So c1  DRDOS/sec (FAT-
 2  XENIX root      39  Plan 9          83  Linux           c4  DRDOS/sec (FAT-
 3  XENIX usr       3c  PartitionMagic  84  OS/2 hidden C:  c6  DRDOS/sec (FAT-
 4  FAT16 <32M      40  Venix 80286     85  Linux extended  c7  Syrinx
 5  Extended        41  PPC PReP Boot   86  NTFS volume set da  Non-FS data
 6  FAT16           42  SFS             87  NTFS volume set db  CP/M / CTOS / .
 7  HPFS/NTFS/exFAT 4d  QNX4.x          88  Linux plaintext de  Dell Utility
 8  AIX             4e  QNX4.x 2nd part 8e  Linux LVM       df  BootIt
 9  AIX bootable    4f  QNX4.x 3rd part 93  Amoeba          e1  DOS access
 a  OS/2 Boot Manag 50  OnTrack DM      94  Amoeba BBT      e3  DOS R/O
 b  W95 FAT32       51  OnTrack DM6 Aux 9f  BSD/OS          e4  SpeedStor
 c  W95 FAT32 (LBA) 52  CP/M            a0  IBM Thinkpad hi eb  BeOS fs
 e  W95 FAT16 (LBA) 53  OnTrack DM6 Aux a5  FreeBSD         ee  GPT
 f  W95 Ext'd (LBA) 54  OnTrackDM6      a6  OpenBSD         ef  EFI (FAT-12/16/
10  OPUS            55  EZ-Drive        a7  NeXTSTEP        f0  Linux/PA-RISC b
11  Hidden FAT12    56  Golden Bow      a8  Darwin UFS      f1  SpeedStor
12  Compaq diagnost 5c  Priam Edisk     a9  NetBSD          f4  SpeedStor
14  Hidden FAT16 <3 61  SpeedStor       ab  Darwin boot     f2  DOS secondary
16  Hidden FAT16    63  GNU HURD or Sys af  HFS / HFS+      fb  VMware VMFS
17  Hidden HPFS/NTF 64  Novell Netware  b7  BSDI fs         fc  VMware VMKCORE
18  AST SmartSleep  65  Novell Netware  b8  BSDI swap       fd  Linux raid auto
1b  Hidden W95 FAT3 70  DiskSecure Mult bb  Boot Wizard hid fe  LANstep
1c  Hidden W95 FAT3 75  PC/IX           be  Solaris boot    ff  BBT
1e  Hidden W95 FAT1 80  Old Minix
Hex code (type L to list codes):
8e
 
# specify Linux LVM

Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help):
p
# show partition table
Disk /dev/sdb: 85.9 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders, total 167772160 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xd70e2fb8

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   167772159    83885056   8e  Linux LVM

Command (m for help):
w
# save and quit

The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
root@dlp:~#
sfdisk -l /dev/sdb
# show status
Disk /dev/sdb: 10443 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 440320 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start     End   #cyls    #blocks   Id  System
/dev/sdb1          2+ 195083- 195082-  83885056   8e  Linux LVM
                start: (c,h,s) expected (2,32,9) found (0,32,33)
                end: (c,h,s) expected (1023,85,10) found (203,85,10)
/dev/sdb2          0       -       0          0    0  Empty
/dev/sdb3          0       -       0          0    0  Empty
/dev/sdb4          0       -       0          0    0  Empty
 
 
 
----------------------------------------------------------------------------------------------------
Configure iSCSI Initiator. This example is based on the environment below.
 
dlp.server.world
[10.0.0.30] - iSCSI Target

 
pc01.server.world
[10.0.0.60] - iSCSI Initiator
[1]
root@pc01:~#
aptitude -y install open-iscsi
root@pc01:~#
vi /etc/iscsi/iscsid.conf
# line 53: uncomment

node.session.auth.authmethod = CHAP
# line 57,58: uncomment and set username and password which set on iSCSI Target

node.session.auth.username =
username

node.session.auth.password =
password
root@pc01:~#
/etc/init.d/open-iscsi restart

# discover target

root@pc01:~#
iscsiadm -m discovery -t sendtargets -p 10.0.0.30

110.0.0.30:3260,1 iqn.2014-04.world.server:target00
# confirm status after discovery

root@pc01:~#
iscsiadm -m node -o show

# BEGIN RECORD 2.0-873
node.name = iqn.2014-04.world.server:target00
node.tpgt = 1
node.startup = manual
node.leading_login = No
.....
.....
# login to target

root@pc01:~#
iscsiadm -m node --login

Logging in to [iface: default, target: iqn.2014-04.world.server:target00, portal: 10.0.0.30,3260] (multiple)
Login to [iface: default, target: iqn.2014-04.world.server:target00, portal: 10.0.0.30,3260] successful.
# confirm session

root@pc01:~#
iscsiadm -m session -o show

tcp: [1] 10.0.0.30:3260,1 iqn.2014-04.world.server:target00
# confirm partitions

root@pc01:~#
cat /proc/partitions

major minor  #blocks  name

  11        0    1048575 sr0
   8        0  209715200 sda
   8        1     248832 sda1
   8        2          1 sda2
   8        5  209463296 sda5
 252        0  192684032 dm-0
 252        1   16777216 dm-1
   8       16   62914560 sdb
# added new device provided from target

[2]
Complete to configure iSCSI Initiator. It's possible to use the provided device from iSCSI Target as a local device.
 

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