HP StorageWorks 2000s User manual

User Guide
hp StorageWorks
iSCSI Feature Pack
Product Version: Version 1.5
First Edition (September 2004)
Part Number: T3662-90901
HP StorageWorks iSCSI Feature Pack for HP NAS products provides virtualization, allocation of disk
storage, and centralized management for iSCSI host applications.

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hp StorageWorks iSCSI Feature Pack User Guide
First Edition (September 2004)
Part Number: T3662-90901

HP StorageWorks iSCSI Feature Pack User Guide 1
Contents
1 Introduction
HP StorageWorks iSCSI Feature Pack. . . . . . . . . . . . . . . . . . . . . 3
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Getting Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Configuring Your iSCSI System
iSNS Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Default Portal Template . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
License and Version Information . . . . . . . . . . . . . . . . . . . . . . . 12
Server Configuration Files . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Server Diagnostic File . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 Logical Units
Creating a New Logical Unit . . . . . . . . . . . . . . . . . . . . . . . . . 14
Importing a Logical Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Viewing Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Expanding a Logical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Assigning/Unassigning a Host to a Logical Unit. . . . . . . . . . . . . . . . 17
Viewing Logical Unit Properties . . . . . . . . . . . . . . . . . . . . . . . 18
Deleting Logical Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4Hosts
Creating a New Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2 HP StorageWorks iSCSI Feature Pack User Guide
Managing Host Initiators . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Managing the LUs Assigned to a Host . . . . . . . . . . . . . . . . . . . . . 21
Managing Portals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Viewing Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Deleting Hosts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5 Command Line Interface
Command Line Basics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Global Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Device Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
File Storage Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Storage Pool Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Host Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Logical Unit Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Configuration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
iSNS Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
iSCSI Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6 Glossary

HP StorageWorks iSCSI Feature Pack User Guide 3
Introduction
With an ever-expanding need for storage, it has become increasingly desirable for small and
medium-sized businesses to consolidate and centralize all of their data.
While Windows-powered HP StorageWorks NAS products have addressed some of their
file-level needs, consolidation/centralization of block-level storage for applications such as
databases and messaging servers has been difficult for these businesses because of a lack
of resources to address the costs and complexity of supporting a Storage Area Network. As
a result, the majority of small and medium business databases and messaging servers are
still using direct attached storage and storage administrators are facing increasing
manageability problems.
The advent of a standard iSCSI protocol holds the promise of allowing these businesses to
have their applications access centralized storage using their existing, familiar IP network
infrastructure.
What is iSCSI?
You are probably already familiar with the Small Computer Systems Interface (SCSI) which
enables host computers to perform block-level data I/O to a variety of peripheral devices
(such as disk and tape devices and printers). The Internet SCSI (iSCSI) protocol adds
dimension to SCSI and eliminates the distance limitation associated with it by enabling
block-level I/O over the IP network.
With its ability to simply attach servers and storage devices into your existing network
infrastructure, iSCSI enables your organization to cost-effectively build and manage a
storage area network based on technologies (SCSI, IP) you already understand and use.
HP StorageWorks iSCSI Feature Pack
HP StorageWorks iSCSI Feature Pack for HP StorageWorks NAS products provides
virtualization, allocation of disk storage, and centralized management for iSCSI host
applications.
HP iSCSI Feature Pack is comprised of a Windows-compatible iSCSI target driver and an
iSNS (Internet Storage Name Service) server. All software management has been integrated
under a tabular “iSCSI” window in the Windows Server 2003
Web Administration screen.

HP StorageWorks iSCSI Feature Pack User Guide 4
The following figure illustrates how your NAS system provides file-level storage for your
workstations, and how your iSCSI Feature Pack provides block-level storage for your
application and file servers.

HP StorageWorks iSCSI Feature Pack User Guide 5
Getting Started
The following steps provide an overview of the tasks you must complete to configure your
system. To install the iSCSI Feature Pack software:
1. For systems with a DVD/CD-ROM drive:
a. Insert the iSCSI Feature Pack installation CD into your CD-ROM.
b. Click
setup.exe .
2.
For systems without a DVD/CD-ROM drive , you can either share the CD from
another system, or copy the CD across the network.
a. To share the CD from another system:
• Insert the CD into another system and share out that system’s DVD/CD-ROM drive.
• From the NAS storage server, map a drive to the CD share and install from it. You
can map to the DVD/CD share from your iSCSI storage server via Windows
Terminal Services client,or via Remote Desktop if you do not have a monitor on your
NAS storage server.
b. To copy the CD across the network:
• Create a directory on the C: drive of the NAS system (e.g. C:\iSCSI), and make it a
share with Full Control (read/write permission).
• Connect to the share from a remote system that has a CD-ROM drive using the
Microsoft File Explorer.
• From the remote system, copy the contents of the CD-ROM to the share on the
NAS system.
• On the NAS system, use My Computer or the File Explorer to browse the directory
that was created (e.g. C:\iSCSI). The contents of the iSCSI Feature Pack CD will
now be in the directory. Click
setup.exe to start the installation.
If your system does not have a monitor, you can use the Windows 2000 Terminal
Services client or
Remote Desktop (available from the Maintenance tab in the Web
Administration console) to install the software.
NOTICE: The name of your iSCSI Feature Pack system cannot exceed 15 characters. This is a
NetBIOS restriction. If your server name is longer, you must rename it before installing
the iSCSI Feature Pack software.
NOTICE: You must use the ANSI machine name for the iSCSI Feature Pack system if you are
running the system on a non-English language machine.
NOTE: Your system will be rebooted after the installation.

HP StorageWorks iSCSI Feature Pack User Guide 6
3. Start your Web Administration console (consult your HP StorageWorks NAS server
documentation for instructions). An
iSCSI tab appears on the Web Administration
console. All features related to the iSCSI Feature Pack can be found under this tab.
4. Click on the
Status: Information message that appears at the top of the console. You
will see an alert that your iSCSI Feature Pack system has not been configured. Click to
configure the following:
• Enter key codes to activate the iSCSI Feature Pack.
• Specify an Internet Storage Name Service (iSNS) server. iSNS facilitates device
discovery in storage networks. For the iSCSI Feature Pack, iSNS facilitates the
naming, registration, and discovery of iSCSI Logical Units (LU) by host initiators. By
default, iSNS is disabled. If you have an external iSNS server, you can set the
system to use it. If you do not have an external iSNS server, you can use the local
one that is provided by the iSCSI Feature Pack (and runs as an independent
Windows service when enabled).
• The HP NAS 500s, 1200s, and 1500s systems have a single pre-allocated LUN and
single file system. To allocate storage to the iSCSI target, create a virtual file-based
device using NTFS (NT File System) volume space. You will need to specify how
large it should be.
5. Install an iSCSI initiator on each of your host systems.
iSCSI initiator software/hardware is available from many sources and needs to be
installed and configured on all servers that will access shared storage.
• For Windows hosts, you can download a software initiator from Microsoft’s website:
http://www.microsoft.com/windowsserversystem/storage/iscsi.mspx
• For Linux hosts, you can download a software initiator from SourceForge.net:
http://sourceforge.net/projects/unh-iscsi
• For NetWare hosts, you can download a software initiator from Novell’s website:
http://download.novell.com/pages/PublicSearch.jsp
6. Create your LUs. Refer to the Logical Units section for more details.
7. Add all of your hosts and assign them to your LUs. Refer to the Hosts section for more
details.
This document provides all of the information you need to get started with your iSCSI
Feature Pack.

HP StorageWorks iSCSI Feature Pack User Guide 7
Getting Help
If you still have a question after reading this guide, contact an HP authorized service
provider or access our web site: http://www.hp.com.
HP Technical Support
Telephone numbers for worldwide technical support are listed on the following HP web site:
http://www.hp.com/support. From this web site, select the country of origin.
NOTE: For continuous quality improvement, calls may be recorded or monitored.
Be sure to have the following information available before calling:
• Technical support registration number (if applicable)
• Product serial numbers
• Product model names and numbers
• Applicable error messages
• Operating system type and revision level
• Detailed, specific questions
HP Storage Web Site
The HP web site has the latest information on this product, as well as the latest drivers.
Access the storage site at: http://www.hp.com/country/us/eng/prodserv/storage.html. From
this web site, select the appropriate product or solution.
HP Authorized Reseller
For the name of your nearest HP authorized reseller:
• In the United States, call 1-800-345-1518
• In Canada, call 1-800-263-5868
Elsewhere, see the HP web site for locations and telephone numbers:
http://www.hp.com.

HP iSCSI Feature Pack User Guide 8
Configuring Your iSCSI System
When you select Configuration from the main iSCSI screen, the following functions are
available:
• iSNS Configuration - Specify which iSNS Server to use.
• Storage - Manage iSCSI storage devices and pools.
• Default Portal Template - Add/delete portals that will be assigned to hosts.
• License and Version Information - Enter key codes for licensed components.
• Server Configuration Files - Back up and restore the server configuration.
• Server Diagnostic File - Capture an X-ray for technical supprort.
iSNS Configuration
iSNS facilitates device discovery in storage networks. For the iSCSI Feature Pack, iSNS
facilitates the naming, registration, and discovery of iSCSI Logical Units (LU) by host
initiators.
By default, iSNS is disabled. If you have an external iSNS server, you can set the system to
use it. If you do not have an external iSNS server, you can use the local one that is provided
by the iSCSI Feature Pack. When enabled, it runs as an independent Windows service.
1. Select
Configuration from the main iSCSI screen.
2. Select
iSNS Configuration .
3. To use the local iSNS server, select
Use local iSNS or to use an external iSNS server,
select
Use remote iSNS at and enter the server’s IP address.
NOTE: If you do not enable iSNS, you will need to register client initiators with your iSCSI
Feature Pack. This enables the server to see the available initiators. Since this
procedure can vary by vendor, you should refer to the documentation provided by the
vendor.

HP iSCSI Feature Pack User Guide 9
Storage
Storage includes both disk devices as well as storage pools:
• Pools can be created from raw device hardware RAID sets. Each storage pool can be a
group of one or more physical devices. Any disk known to your Windows system that
does not have valid partition information is a candidate for a storage pool.
• File-based devices can be created from files on a software volume.
Once created, LUs can be created from the pools/file-based device and assigned to hosts.
When you select
Storage from the Configuration screen, you will see a list of all of your
existing iSCSI storage (except imported disks).
Creating a Storage Pool
1. Select Configuration from the main iSCSI screen.
2. Select
Storage .
3. Click
New Pool .
4. Enter a name for the pool.
5. Select one or more available devices to include in the pool.
Adding/Removing Devices From a Storage Pool
1. Click the checkbox to the left of the pool you want to modify.
2. Click
View Devices.
You will see a list of all iSCSI storage. Information about each device, including size,
type, and usage is included here. You can click on the device name to see how the
segments of the device are being used.
3. Select the devices that should be in this pool.
Merging Storage Pools
1. Click the checkbox(es) to the left of the pool(s) you want to merge.
You can select to merge two or more pools.
2. Click
Merge Pools.
3. Specify a name for the new pool.
Deleting a Storage Pool
NOTE: You can only delete a pool if it is empty or if all of the devices in the pool have zero usage.

HP iSCSI Feature Pack User Guide 10
1. Click the checkbox(es) to the left of the pool(s) you want to delete.
2. Click
Delete Pool.
3. Click OK to confirm the deletion.
Creating a File-Based Device
1. Click Create File Device.
2. Select the volume and specify how much space should be used from this volume.
Expanding a File-Based Device
If you did not use the entire volume to create your file-based device, you can expand it as
more storage is needed.
To expand a file-based device:
1. Click the checkbox to the left of the file-based device.
2. Click
Expand File Device .
3. Indicate how much space to add and click
OK .
Deleting a File-Based Device
NOTE: You can only disable a file-based device if it is not being used.
1. Click the checkbox to the left of the file-based device.
2. Click
Delete File Device.
3. Click OK to confirm.
Viewing Device Layout
You can see how the segments of a device are being used, including whether it contains
LUs.
To view device layout for an iSCSI storage device that is not in a pool:
1. Click the checkbox to the left of the device you want to view.
2. Click
View Device Layout.

HP iSCSI Feature Pack User Guide 11
To view device layout for a storage pool:
1. Click the checkbox to the left of the pool you want to view.
2. Click
View Devices.
3. Click on the device name.
Adopting a Device
You can adopt a foreign iSCSI Feature Pack disk for the purposes of disaster recovery.
A foreign disk is a physical device containing iSCSI LUs previously set up on a different
iSCSI Feature Pack system. You might need to adopt a disk if an iSCSI Feature Pack
system is damaged and you want to import the server’s disks to a new system.
NOTICE: We highly recommend that you adopt a device into a new, clean iSCSI Feature Pack
system that does not have any LUs created.
1. Click Adopt Devices .
2. Select the device you would like to import.
3. Click
OK .
You click the
Rescan link to refresh the list of available devices.
Default Portal Template
Portals are access points used by hosts to communicate with the iSCSI Feature Pack. Each
portal is a combination of an IP address, port number, and port group number.
By default, the iSCSI Feature Pack assigns each new host one portal for each network
interface card (NIC) IP address used by the iSCSI Feature Pack, with the default iSCSI port
number 3260 and group 0.
The Default Portal Template screen lets you set the template that will be used when new
hosts are created. In other words, the portals listed on this screen will be offered to each new
host. You may then want to customize the portals for a specific host so that, for example,
each host uses a separate NIC or port.
To add/remove portals:
1. Select
Configuration from the main iSCSI screen.
2. Select
Default Portal Template .
3. To add a new portal, click
Add , select an IP address, and enter a port number and port
group.
To delete a portal, click the checkbox to the left of it and click
Remove .

HP iSCSI Feature Pack User Guide 12
License and Version Information
To enter key codes for iSCSI Feature Pack components in order to activate the components:
1. Select
Configuration from the main iSCSI screen.
2. Select
License and Version Information .
A list of all licensed components is displayed.
3. Click
Add .
4. Enter the key code for the component.
Server Configuration Files
Your iSCSI Feature Pack provides a convenient way to protect your configuration, including
host assignments and storage pools. You should save the configuration any time you
change it.
To
save the configuration perform the following steps:
1. Select
Configuration from the main iSCSI screen.
2. Select
Server Configuration Files .
3. Click
Backup to back up data to a local system.
4. Specify a location for the file.
You can restore your iSCSI Feature Pack configuration from a file that was created using
Backup . Changes made since the configuration was last saved will not be included in the
restored configuration. In addition, actual LUs that may have been deleted after the
configuration was saved will not be re-created.
NOTE: Restoring a configuration will overwrite existing configuration files and you will lose your current
connection. The restoration function is for disaster recovery purposes and should not be used in
the day-to-day operation of the server.
To restore the configuration perform the following steps:
1. Select
Configuration from the main iSCSI screen.
2. Select
Server Configuration Files .
3. Locate the saved file and click
Restore .
By default, the name of backed up file is:
iscsicfg.tgz
The iSCSI Feature Pack will be restarted once the restoration is complete.

HP iSCSI Feature Pack User Guide 13
Server Diagnostic File
The iSCSI Feature Pack has a built-in diagnostic feature that captures information about
your server into a file that can be sent to HP’s technical support team.
To create a diagnostic File:
1. Select
Configuration from the main iSCSI screen.
2. Select
Server Diagnostic File .
3. Select
Create Diagnostic File .
4. Specify a path for the file.

HP StorageWorks iSCSI Feature Pack User Guide 14
Logical Units
A Logical Unit (LU) is a logically mapped disk device that is created from a physical device
or from a storage pool.
Hosts (file and application servers) do not have access to physical resources; they have
access only to LUs. This means that physical resources must be defined as LUs first, and
then assigned to hosts so they can access them.When a LU is assigned to a host, the host
views the LU as its own attached storage device.
LUs offer the added capability of disk expansion. Additional storage blocks can be allocated
from the LU’s physical device or storage pool and appended to the end of the existing LU
without erasing the data on the disk. Each LU may be expanded up to 2 TB.
When you select
Logical Units from the main iSCSI screen, you will see a list of all existing
LUs. Information about each LU is included here. To search for a specific LU, type its name
(or a few letters) and click
Go . Only those LUs that match the letters you typed will be
displayed.
From the
Logical Units screen, the following functions are available:
• New - Create a new LU and assign it to a host.
• Import - Import a hard drive with existing data to take advantage of the iSCSI Feature
Pack’s storage services.
• Delete - Delete a LU.
• View Layout - See where a LU’s components are located.
• Expand - Increase the size of a LU.
• Hosts - Change the host assignment or access rights for a LU.
• Properties - View configuration of a LU or change the LU name.
Creating a New Logical Unit
NOTE: If you want a LU to include storage from multiple physical devices, you need to create a
storage pool before creating the LU. Refer to the Configuring Your iSCSI System section
for more details.
1. Select Logical Units from the main iSCSI screen.
2. Click
New .
3. Enter a name for the new LU.

HP StorageWorks iSCSI Feature Pack User Guide 15
4. Select the location of the storage for the LU.
The storage can be from a physical device or storage pool (composed of one or more
physical devices) or, for systems with external storage, from raw devices available to
the iSCSI Feature Pack.
If you need to modify your RAID system to allocate additional space for your LU, click
the link
Click here to add raid set . Afterwards, click Click here to force a rescan of
the devices
.
5. Enter a
Size for the LU.
The minimum size for each LU is 20 MB.
6. Assign one or more hosts to the newly created LU and assign access rights for each.
• No Access - This host cannot access this LU.
• Read Only - This host will have read-only access to the LU.
NOTE: If you set Read Only access rights for a LU that contains an NTFS partition, that partition
will only be readable in Windows 2003. The LU will not show up properly in Windows
versions prior to 2003.
• Read/Write Exclusive - Only this host can access the LU. The host has both read
and write access. All others (including Read Only) will be denied access.
• Read/Write Non-Exclusive - Two hosts can connect at the same time with both
read and write access.
NOTICE: There is a potential for data corruption if you set the access rights to Read/Write Non-
Exclusive and you have multiple hosts writing to a device at the same time.
7. Confirm all information and click Finish to create the LU.
NOTE: In order for a host to use the newly created LU, you will have to take operating system-
specific actions in order for the host to see the new storage. For example, with Windows
you must rescan disks via the system’s Computer Management (available through the
Control Panel). You will then need to write a signature, create a partition, and format the
drive so that the host can use it.
Importing a Logical Unit
(This feature is only available on systems with external storage.) The Import feature allows
you to create a LU from an existing disk. Hard drives with existing data can be imported to
make use of the iSCSI Feature Pack’s functionality without any migration/copying or
modification of data.

HP StorageWorks iSCSI Feature Pack User Guide 16
This can be useful for protecting your existing local iSCSI virtual disks (used for file sharing)
because it allows you to import each disk as a LU to take advantage of the iSCSI data
services.
Because imported disks are preserved intact, the devices are not virtualized and cannot be
expanded. Imported disks are all maintained in a one-to-one mapping relationship (one
physical disk equals one logical device). Unlike virtual devices, they cannot be combined or
divided into multiple LUs.
In order to import a hard disk, it must be one of the following:
• Raw disk (no partitions)
• Non-boot, non-virtual disk with volumes that are not mounted and do not contain any
iSCSI file devices
If you want to import a disk with existing data, you must unmount all volumes on the disk (i.e.
unassign all drive letters) in order to make it available for import.
To import a disk:
1. On the
Logical Units screen, click Import .
2. Enter a
Name for the LU that is being created.
3. Select the disk to import.
4. Select the location where the disk information will be stored.
NOTE: About 7 MB of disk space is needed to store information about the imported disk.
5. Click OK .
You will see the imported disk listed with your other LUs. The
Type will be listed as
Import .
NOTICE: Once a disk is imported, it should not be mounted by the local operating system.
Viewing Layout
You can see where a LU’s components are allocated (devices and sectors).
To view the layout:
1. On the
Logical Units screen, click the checkbox to the left of the LU that you want to
view.
2. Click
View Layout .

HP StorageWorks iSCSI Feature Pack User Guide 17
Expanding a Logical Unit
Because virtualized LUs do not represent actual physical resources, they can be expanded
as more storage is needed. The LU can be increased in size by adding more blocks of
storage from unallocated space on the LU’s physical device or storage pool.
Remember that you will still need to repartition the virtual devices and adjust/create/resize
any file-systems on the partition after the virtual device is expanded. Because partition and
file-system formats are specific to the operating system that the host is running, you must
perform these tasks directly from the host. You can use tools like PartitionMagic
®
or Veritas
Volume Manager
TM
to add more drives to expand existing volumes on the fly in real time
(without application down time).
To expand a LU:
1. On the
Logical Units screen, click the checkbox to the left of the LU that you want to
expand.
2. Click
Expand .
3. Indicate how much space to add and click
OK .
NOTICE: In order for a host to access the newly expanded LU, you will have to take operating
system-specific actions. If you are using the Microsoft iSCSI initiator, you need to
launch the initiator software on the host machine and log off (from the Active
Sessions tab) and then log on (from the Available Targets tab). This will temporarily
disconnect the host.
Assigning/Unassigning a Host to a Logical Unit
While you generally assign a host to a LU when you create the LU, at any time you can
change the host assignment. To do this:
1. On the
Logical Units screen, click the checkbox to the left of the LU whose assignment
you want to change.
2. Click
Hosts .
3. Assign one or more hosts to the LU and assign access rights for each.
If you change the access rights for a host, you must go to your initiator software and re-
login to the server in order for the change to take effect. If you are using the Microsoft
iSCSI initiator, you need to launch the initiator software on the host machine and log off

HP StorageWorks iSCSI Feature Pack User Guide 18
(from the Active Sessions tab) and then log on (from the Available Targets tab). This
will temporarily disconnect the host.
NOTE: In order for an existing host to access this newly assigned LU, you will have to take
operating system-specific actions in order for the host to see the new storage. For
example, with Windows you must rescan disks via the system’s Computer Management
(available through the Control Panel). You will then need to write a signature, create a
partition, and format the drive so that the host can use it.
Viewing Logical Unit Properties
You can view the configuration of a LU or change the LU’s name. To do this:
1. On the
Logical Units screen, click the checkbox to the left of the LU whose properties
you want to view.
2. Click
Properties .
3. If you want to change the LU’s name, type a new name in the box and click
OK .
Deleting Logical Units
You can delete one or more LUs. All data on the LU will be deleted and the space occupied
by the LU will become available for a new LU.
NOTE: You should not delete a LU if a host is attached to it.
To delete a LU:
1. On the
Logical Units screen, click the checkbox(es) to the left of the LU(s) you want to
delete.
2. Click
Delete.
3. Click OK to confirm the deletion.