Fujitsu ETERNUS Instruction Manual

ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
(SUSE Linux Enterprise Server) 3Copyright 2010 FUJITSU LIMITED
P3AM-4152-02ENZ0
Preface
This document briefly explains the operations that need to be performed by the user in order to
connect an ETERNUS2000 model 100 or 200, ETERNUS4000 model 300, 400, 500, or 600, or
ETERNUS8000 model 700, 800, 900, 1100, 1200, 2100, or 2200 Disk storage system to a
server running SUSE Linux Enterprise Server via an iSCSI interface.
This document should be used in conjunction with any other applicable user manuals, such as
those for the ETERNUS2000 model 100 or 200, ETERNUS4000 model 300, 400, 500, or 600, or
ETERNUS8000 model 700, 800, 900, 1100, 1200, 2100, or 2200 Disk storage system, server,
OS used, adapters, drivers, etc.
This document references the following documents:
•Server Support Matrix
•ETERNUS Disk storage systems Server Connection Guide (iSCSI) ETERNUS Disk Storage
System Settings for ETERNUS ETERNUS2000
•ETERNUS Disk storage systems Server Connection Guide (iSCSI) ETERNUS Disk Storage
System Settings for ETERNUS4000, ETERNUS8000
•ETERNUSmgr Install Guide
•ETERNUSmgr User Guide
Also, note that in this document the ETERNUS2000 models 100 and 200, ETERNUS4000 mod-
els 300, 400, 500, and 600, and ETERNUS8000 models 700, 800, 900, 1100, 1200, 2100, and
2200 Disk storage systems are collectively referred to as ETERNUS Disk storage systems.
Second Edition
December 2010
The Contents and Structure of this Manual
This document is composed of the following nine chapters.
•Chapter 1 Workflow
This describes how to connect the ETERNUS Disk storage systems to a server running
Linux.
•Chapter 2 Checking the Server Environment
This describes which servers can be connected to ETERNUS Disk storage systems.
•Chapter 3 LAN Switch Connection
This describes how to connect the ETERNUS Disk storage system to the server via a LAN
switch.

Preface
ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
(SUSE Linux Enterprise Server) 4Copyright 2010 FUJITSU LIMITED
P3AM-4152-02ENZ0
•Chapter 4 Notes
This describes issues that should be noted when connecting the ETERNUS Disk storage
systems and server.
•Chapter 5 Setting Up the Linux Server
This describes how to install and set up the Linux server.
•Chapter 6 Installing and Setting Up ETERNUSmgr
This describes how to install ETERNUSmgr.
•Chapter 7 Setting Up the ETERNUS Disk Storage Systems
This describes how to set up the ETERNUS Disk storage systems using ETERNUSmgr.
•Chapter 8 ETERNUS Disk Storage System Logical Unit Recognition
This describes how to recognize the ETERNUS Disk storage system LUNs from server.
•Chapter 9 Setting Up and Checking the device-mapper multipath
This describes how to set up and check the device-mapper multipath.
Safe Use of this Product
■Using this manual
This manual contains important information to ensure the safe use of this product. Be sure to
thoroughly read and understand its contents before using the product. After reading, store this
manual in a safe place for future reference.
FUJITSU has made every effort to ensure the safety of the users and other personnel, and to
prevent property damage. When using this product, carefully follow the instructions described in
this manual.
Acknowledgments
•Linux is a trademark or registered trademark of Linus Torvalds in the USA and other
countries.
•SUSE is a registered trademark of SUSE Linux AG., a subsidiary of Novell, Inc.
•The company names, product names and service names mentioned in this document are
registered trademarks or trademarks of their respective companies.

Preface
ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
(SUSE Linux Enterprise Server) 5Copyright 2010 FUJITSU LIMITED
P3AM-4152-02ENZ0
Naming Conventions
■Product Names
•"SLES" refers to SUSE Linux Enterprise Server.
•"SLES11" refers to the following products:
-SUSE Linux Enterprise Server 11
•"SLES10" refers to the following products:
-SUSE Linux Enterprise Server 10
■Other names
•"iSCSI port" or "Channel Adapter" (CA) refers to the iSCSI interface module used in the
ETERNUS Disk storage systems to connect to the server.
•"LAN card" refers to the iSCSI interface module normally used in the server. A "Network
Interface Card" (NIC), "LAN adapter", or "LAN board" may be used instead, depending on the
server.
Copyright 2010 FUJITSU LIMITED

ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
(SUSE Linux Enterprise Server) 6Copyright 2010 FUJITSU LIMITED
P3AM-4152-02ENZ0
Contents
Chapter 1 Workflow ...................................................................................8
Chapter 2 Checking the Server Environment........................................10
2.1 Hardware .......................................................................................................... 10
2.2 Basic Software ................................................................................................. 10
2.3 LAN Cards ........................................................................................................ 10
2.4 Multipath Driver ................................................................................................ 10
Chapter 3 LAN Switch Connection.........................................................11
Chapter 4 Notes .......................................................................................12
4.1 LAN Environment Notes ................................................................................... 12
4.2 Server Startup and Power Supply Control Notes ............................................. 12
4.3 SLES Notes ...................................................................................................... 12
Chapter 5 Setting Up the Linux Server ..................................................13
5.1 Preparation ....................................................................................................... 13
5.1.1 Installing the "open-iscsi" package ............................................................................................ 13
5.1.2 Preparing the device-mapper multipath setup ........................................................................... 13
5.2 Setting Up Automatic iSCSI Service ................................................................ 14
5.3 Setting Up the Network Environment ............................................................... 14
5.4 Checking the iSCSI Initiator Name ................................................................... 14
Chapter 6 Installing and Setting Up ETERNUSmgr ..............................15
Chapter 7 Setting Up the ETERNUS Disk Storage Systems................16
Chapter 8 ETERNUS Disk Storage System Logical Unit
Recognition.............................................................................17
8.1 When CHAP Authentication is not Used .......................................................... 17
8.2 When Unidirectional CHAP Authentication is Used ......................................... 18
8.3 When Bidirectional CHAP Authentication is Used ........................................... 19
8.4 Rebooting the Linux Server .............................................................................. 20
8.5 Recognizing LUNs ........................................................................................... 20
Chapter 9 Setting Up and Checking the device-mapper multipath.....21
9.1 Editing "/etc/multipath.conf" .............................................................................. 21

Contents
ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
(SUSE Linux Enterprise Server) 7Copyright 2010 FUJITSU LIMITED
P3AM-4152-02ENZ0
9.2 Enabling the device-mapper multipath ............................................................. 22
9.3 Rebooting the Linux Server .............................................................................. 22
9.4 Recognizing the Post device-mapper multipath LUNs ..................................... 23
9.5 Checking the device-mapper multipath Status ................................................. 23

ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
(SUSE Linux Enterprise Server) 8Copyright 2010 FUJITSU LIMITED
P3AM-4152-02ENZ0
Chapter 1 Workflow
Which documents need to be referred to varies with the connection environment. Refer to the
workflow that follows to determine which documents are required.
Required Documents
•ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux (SUSE Linux
Enterprise Server) (This manual)
•Server Support Matrix
•ETERNUS Disk storage systems Server Connection Guide (iSCSI) ETERNUS Disk Storage
System Settings for ETERNUS2000
•ETERNUS Disk storage systems Server Connection Guide (iSCSI) ETERNUS Disk Storage
System Settings for ETERNUS4000, ETERNUS8000
•ETERNUSmgr Install Guide
•ETERNUSmgr User Guide
•Other manuals provided with each product (server, Multipath Driver, and LAN card)
Workflow
Set Up the Linux Server
Set up the OS, hardware, software, and iSCSI environment.
Refer
-"Chapter 5 Setting Up the Linux Server" (page 13)

Chapter 1 Workflow
>
ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
(SUSE Linux Enterprise Server) 9Copyright 2010 FUJITSU LIMITED
P3AM-4152-02ENZ0
Install ETERNUSmgr and Set Up the ETERNUS Disk Storage System
If ETERNUSmgr is to be used, install it and set up the ETERNUS Disk storage system.
Refer
-"Chapter 6 Installing and Setting Up ETERNUSmgr" (page 15)
-"Chapter 7 Setting Up the ETERNUS Disk Storage Systems" (page 16)
-Installing ETERNUSmgr
•"ETERNUSmgr Install Guide"
-Checking the setup and maintenance operations
•"ETERNUSmgr User Guide"
-Setting up the ETERNUS Disk storage system
•"ETERNUS Disk storage systems Server Connection Guide (iSCSI) ETERNUS
Disk Storage System Settings for ETERNUS2000"
•"ETERNUS Disk storage systems Server Connection Guide (iSCSI) ETERNUS
Disk Storage System Settings for ETERNUS4000, ETERNUS8000"
Set the Server to Recognize the Logical Units
Set up the server so that it can recognize the ETERNUS Disk storage systems' LUN
(logical units).
Refer
-"Chapter 8 ETERNUS Disk Storage System Logical Unit Recognition" (page 17)
Set Up and Check the device-mapper multipaths
If device-mapper multipathing is used, set up and check the device-mapper multipaths.
Refer
-"Chapter 9 Setting Up and Checking the device-mapper multipath" (page 21)

ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
(SUSE Linux Enterprise Server) 10 Copyright 2010 FUJITSU LIMITED
P3AM-4152-02ENZ0
Chapter 2 Checking the Server Environment
Refer to the "Server Support Matrix" to check the server environment.
2.1 Hardware
Refer to the "Server Support Matrix".
2.2 Basic Software
Refer to the "Server Support Matrix".
2.3 LAN Cards
Refer to the "Server Support Matrix".
2.4 Multipath Driver
Refer to the "Server Support Matrix".

ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
(SUSE Linux Enterprise Server) 11 Copyright 2010 FUJITSU LIMITED
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Chapter 3 LAN Switch Connection
•As with an FC-SAN, because of the large data flows (traffic volumes) the iSCSI LAN is
assumed to be a dedicated LAN separate from the business and management LANs, and
constructed with its own LAN switch.
•iSCSI LAN redundancy is achieved by the use of multipaths.
•For IP network security reasons too, it is useful to separate the iSCSI LAN (for data transfers)
and management LAN (for administration) to prevent cross-access between them (use of
VLAN to separate the LAN segments is recommended).
Example LAN switch connection configuration
*1: In this system configuration, multipaths provide redundant connections between the servers and
storage system. LAN switches #1 and #2 provide physical separation of the network paths.
*2: A separate LAN segment is provided in the LAN switch (using the switch VLAN function) for each
grouping of business servers and disk storage systems (equivalent to the FC zones).
Business server A
LAN
card
#2
LAN
card
#1
Business server B
LAN
card
#2
LAN
card
#1
Business server C
LAN
card
#2
LAN
card
#1
LAN
card
#3
LAN switch
[Business LAN]
LAN switch
[Management LAN]
ETERNUS Disk storage system
12
LAN switch #1
[iSCSI LAN]
123
10 11 12
LUN1 LUN2
10
2 3
11
LAN switch #2
[iSCSI LAN]
LAN
card
#3
LAN
card
#3
1
LUN3 Management
LAN port
LAN switches should not
be inter-connected (*1)
A separate LAN segment is used for each
Server/Storage grouping. (*2)
Here, LAN ports 1, 2 and 10 comprise VLAN1,
while LAN ports 3 and 11 comprise VLAN2.
The iSCSI LAN and management
LAN segments are kept separate
in the iSCSI LAN switches, helping
maintain the security of each.
Similarly to FC-SAN, a
dedicated LAN is used for
iSCSI, not the business LAN.
Business LAN
iSCSI LAN
Management LAN

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P3AM-4152-02ENZ0
Chapter 4 Notes
4.1 LAN Environment Notes
•A dedicated iSCSI connection LAN is required, separate to the operation LAN and manage-
ment LAN.
•The iSCSI connection LAN should only contain 1000BASE-T compatible devices.
•When connecting the ETERNUS Disk storage system and server via a LAN switch, use a
VLAN or similar function to isolate this connection on a separate segment within the LAN
switch from other network or iSCSI access segments.
4.2 Server Startup and Power Supply Control Notes
Before turning the server on, check that the ETERNUS Disk storage systems and LAN switches
are all "Ready".
If the server is turned on and they are not "Ready", the server will not be able to recognize the
ETERNUS Disk storage systems.
Also, when the ETERNUS Disk storage system power supply is being controlled by a connected
server, make sure that the ETERNUS Disk storage system does not shut down before the con-
nected servers. Similarly, the LAN switches must also be turned off after the connected servers
have been shut down.
If turned off, data writes from the running server cannot be saved to the ETERNUS Disk storage
systems, and already saved data may also be affected.
4.3 SLES Notes
For details involving SLES, refer to the Novell web-site and any documentation available.

ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
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Chapter 5 Setting Up the Linux Server
5.1 Preparation
5.1.1 Installing the "open-iscsi" package
Red Hat Package Manager (RPM) is used to set up the iSCSI environment in the Linux server.
Check that one of the following RPMs is installed. If not, install it.
For SLES10 SP2: open-iscsi-2.0.707-0.44.<Architecture name> or later
Installation execution example
5.1.2 Preparing the device-mapper multipath setup
Use the following Red Hat Package Manager (RPM) to set up the device-mapper multipaths. If
this RPM is not installed, install it.
Installation execution example
# rpm -ivh open-iscsi-2.0.707-0.19.<Architecture_name>.rpm
device-mapper-1.02.03-8.2.<Architecture_name> or later
device-mapper-32bit-1.02.03-8.2.<Architecture_name> or later
multipath-tools-0.4.6-25.17.<Architecture_name> or later
# rpm -ivh device-mapper-1.02.03-8.2.<Architecture_name> or later

Chapter 5 Setting Up the Linux Server
> 5.2 Setting Up Automatic iSCSI Service
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5.2 Setting Up Automatic iSCSI Service
YaST is used to set up the iSCSI service. Refer to the Novell web-site for details of the setup pro-
cedure.
Procedure
1Start YaST and then run the iSCSI Initiator in Miscellaneous.
The iSCSI Initiator Overview window appears.
2In the iSCSI Initiator Overview window, open the Service tab and select "When
Booting".
End of procedure
5.3 Setting Up the Network Environment
Set the IP information (IP address and subnet mask) of the LAN card.
5.4 Checking the iSCSI Initiator Name
Check which iSCSI initiator name is described as the default in the "/etc/iscsi/initiatorname.iscsi"
file.
This iSCSI initiator name should be used for the ETERNUS Disk storage system settings.
Set the same subnet as that set for the ETERNUS Disk storage system
LAN card.
For details of the ETERNUS Disk storage system settings, refer to "Chapter
7 Setting Up the ETERNUS Disk Storage Systems" (page 16).

ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
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Chapter 6 Installing and Setting Up ETERNUSmgr
If ETERNUSmgr is to be used, install it according to the directions given in the "ETERNUSmgr
Install Guide". After the installation, set up ETERNUSmgr following the instructions in the
"ETERNUSmgr User Guide".

ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
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Chapter 7 Setting Up the ETERNUS Disk Storage
Systems
Set up the ETERNUS Disk storage systems using ETERNUSmgr.
ETERNUS Disk storage systems' setup can be performed independently of server setup. For
details on how to perform these settings, refer to the "ETERNUS Disk storage systems Server
Connection Guide (iSCSI) ETERNUS Disk Storage System Settings for ETERNUS2000" or
"ETERNUS Disk storage systems Server Connection Guide (iSCSI) ETERNUS Disk Storage
System Settings for ETERNUS4000, ETERNUS8000", and "ETERNUSmgr User Guide".

ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
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Chapter 8 ETERNUS Disk Storage System Logical
Unit Recognition
Connect the ETERNUS Disk storage system to the server with a LAN cable.
After connecting, reboot the Linux server and check that the Linux server recognizes the
ETERNUS Disk storage system LUNs.
YaST is used to set up the server. Refer to the Novell web-site for details of the setup procedure
with YaST.
8.1 When CHAP Authentication is not Used
Procedure
1Start YaST and then run the iSCSI Initiator in Miscellaneous.
2Select the "Discovered Targets" tab and click the [Discovery] button to open the
iSCSI Initiator Discovery dialog.
3Set the IP address for the ETERNUS Disk storage system iSCSI port in "IP
Address".
Keep the default port number value (3260).
4Check that "No_Authentification" is selected and click the [Next] button.
5Check that the desired Target is visible in the "Discovered Targets" tab.
The "Connected" state of the Target should be "False" at this time.
6Select the desired Target in the "Discovered Targets" tab, and click the [Log In]
button to re-open the CHAP selection dialog.
If CHAP authentication is not being used, check that "No_Authentification" is selected and
click the [Next] button.
7After both path logins have completed, check that the information of the desired
Target is visible in the "Connected Targets" of the iSCSI Initiator Overview.
8Make sure that "Start-Up" for the desired Target is set to "automatic" (if currently
set to "manual", select the Target and click the [Toggle Start_Up] button), then
click the [Finish] button.
End of procedure

Chapter 8 ETERNUS Disk Storage System Logical Unit Recognition
> 8.2 When Unidirectional CHAP Authentication is Used
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8.2 When Unidirectional CHAP Authentication is Used
Procedure
1Start YaST and then run the iSCSI Initiator in Miscellaneous.
2Select the "Discovered Targets" tab and click the [Discovery] button to open the
iSCSI Initiator Discovery dialog.
3Set the IP address for the ETERNUS Disk storage system iSCSI port in "IP
Address".
Keep the default port number value (3260).
4Select "Outgoing Authentication" for unidirectional CHAP authentication.
4-1 Enter the UserName that is set in iSCSI Host of the ETERNUS Disk storage system in
"UserName".
4-2 Enter the Password that is set in iSCSI Host of the ETERNUS Disk storage system in
"Password".
4-3 Click the [Next] button.
5Check that the desired Target is visible in the "Discovered Targets" tab.
The "Connected" state of the Target should be "False" at this time.
6Select the desired Target in the "Discovered Targets" tab, and click the [Log In]
button to re-open the CHAP selection dialog.
6-1 Select "Outgoing Authentication" for unidirectional CHAP authentication.
6-2 Enter the UserName that is set in iSCSI Host of the ETERNUS Disk storage system in
"UserName".
6-3 Enter the Password that is set in iSCSI Host of the ETERNUS Disk storage system in
"Password".
6-4 Click the [Next] button.
7After both path logins have completed, check that the information of the desired
Target is visible in the "Connected Targets" of the iSCSI Initiator Overview.
8Make sure that "Start-Up" for the desired Target is set to "automatic" (if currently
set to "manual", select the Target and click the [Toggle Start_Up] button), then
click the [Finish] button.
End of procedure

Chapter 8 ETERNUS Disk Storage System Logical Unit Recognition
> 8.3 When Bidirectional CHAP Authentication is Used
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8.3 When Bidirectional CHAP Authentication is Used
Procedure
1Start YaST and then run the iSCSI Initiator in Miscellaneous.
2Select the "Discovered Targets" tab and click the [Discovery] button to open the
iSCSI Initiator Discovery dialog.
3Set the IP address for the ETERNUS Disk storage system iSCSI port in "IP
Address".
Keep the default port number value (3260).
4Perform the following procedure when bidirectional CHAP is used.
4-1 Select "Incoming Authentication".
4-2 Enter the UserName that is set in iSCSI Host of the ETERNUS Disk storage system in
"UserName".
4-3 Enter the Password that is set in iSCSI Host of the ETERNUS Disk storage system in
"Password".
4-4 Select "Outgoing Authentication".
4-5 Enter the UserName that is set in "Set iSCSI Port Parameters" of the ETERNUS Disk
storage system in "UserName".
4-6 Enter the Password that is set in "Set iSCSI Port Parameters" of the ETERNUS Disk
storage system in "Password".
4-7 Click the [Next] button.
5Check that the desired Target is visible in the "Discovered Targets" tab.
The "Connected" state of the Target should be "False" at this time.
6Select the desired Target in the "Discovered Targets" tab, and click the [Log In]
button to re-open the CHAP selection dialog.
Perform the following procedure for unidirectional CHAP authentication.
6-1 Select "Incoming Authentication".
6-2 Enter the UserName that is set in iSCSI Host of the ETERNUS Disk storage system in
"UserName".
6-3 Enter the Password that is set in iSCSI Host of the ETERNUS Disk storage system in
"Password".
6-4 Select "Outgoing Authentication".
6-5 Enter the UserName that is set in "Set iSCSI Port Parameters" of the ETERNUS Disk
storage system in "UserName".

Chapter 8 ETERNUS Disk Storage System Logical Unit Recognition
> 8.4 Rebooting the Linux Server
ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux
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6-6 Enter the Password that is set in "Set iSCSI Port Parameters" of the ETERNUS Disk
storage system in "Password".
6-7 Click the [Next] button.
7After both path logins have completed, check that the information of the desired
Target is visible in the "Connected Targets" of the iSCSI Initiator Overview.
8Make sure that "Start-Up" for the desired Target is set to "automatic" (if currently
set to "manual", select the Target and click the [Toggle Start_Up] button), then
click the [Finish] button.
End of procedure
8.4 Rebooting the Linux Server
Reboot the Linux server.
Execution example
8.5 Recognizing LUNs
After rebooting, check that the Linux server recognizes the ETERNUS Disk storage system
LUNs. At boot up, Linux automatically recognizes all SCSI disks and assigns them successive
device names starting from "sda". When assigning the device names, any internal SCSI disks
are assigned first, followed by the assignment of the ETERNUS Disk storage systems' LUNs. For
example, if there is one internal SCSI disk and three ETERNUS Disk storage system LUNs,
SCSI device names are assigned as follows:
# shutdown -r now
SCSI device name by-id name Explanation
dev/sda /dev/disk/by-id/scsi-
36003005700026cc011251e4b0b80ac59 Internal SCSI disk
/dev/sdb /dev/disk/by-id/scsi-
3600000e00d0000000001000000000000 ETERNUS Disk storage systems' LUN
/dev/sdc /dev/disk/by-id/scsi-
3600000e00d0000000001000000010000
/dev/sdd /dev/disk/by-id/scsi-
3600000e00d0000000001000000020000