Buffalo TeraStation III TS-IXL User manual

Network Attached Storage
TeraStation III iSCSI User Manual
www.buffalotech.com
35011188 ver.01
TS-IXL
TS-RIXL

TeraStation IS Setup Guide 1
Contents
Chapter 1 Introduction ........................................................................... 3





Chapter 2 Using the iSCSI Hard Disk Connection Tool ....... 7




Chapter 3 Conguration Utility .............................................................. 13

Chapter 4 Using Logical Volume Manager (LVM) .................................... 14



Chapter 5 Changing RAID Mode ............................................................ 17








TeraStation IS Setup Guide 2
Chapter 6 Congure Access Restrictions ................................................. 26


Chapter 7 TeraStation Maintenance ....................................................... 28















Chapter 8 Conguration Utility .............................................................. 45





Appendix .................................................................................... 55





TeraStation IS Setup Guide 3
Chapter 1
Introduction
iSCSI
Can be placed anywhere
It is recognized as a local hard disk just like USB
hard drives, but you don't have to place this
unit close to your computer or server unlike a
USB hard drive since this unit is connected via
the network.
Can be used as a local drive
Since it is recognized as a local drive, all features
of your OS and applications can be used. You can
format the drive with NTFS from Windows.
This example shows a TS-IXL TeraStation. The rackmount TS-RIXL is functionally identical.
iSCSI Compatible Hard Drive
iSCSI ("Internet Small Computer System Interface") is a standard to transmit data on an Ethernet network by
encapsulating SCSI commands in TCP/IP protocol. Connecting Ethernet cabling as iSCSI, it is recognized as a
local drive by computers or servers.

TeraStation IS Setup Guide 4
For best results, use dedicated Gigabit (1000BASE-T)
NICs, cabling, and routers to connect iSCSI drives.
Use of slower network equipment, or sharing a
network with normal Ethernet trafc, will compromise
performance.
Consider Network Structure
Differences between NAS and iSCSI
NAS
Servers and computers directly access shared folders on a NAS.
• Create and use shared folders easily (no extra server needed)
• Access les directly using XFS format.
• Features like backup are built-in to the NAS.
iSCSI
A server creates shared folders on the iSCSI drive, and a
computer accesses shared folders on the server.
• Can be used as a local drive from Windows Server and
accessed via the server by client computers.
• All standard Windows features such as Access
Restrictions with Active Directory can be used on iSCSI
drives.
• Database software that requires special formatting can
by used with iSCSI drives..

TeraStation IS Setup Guide 5
Install the "Microsoft iSCSI Software Initiator" rst.
Before you can use iSCSI equipment with Windows XP, 2000, or Server 2003, you must
download and install the "Microsoft iSCSI Software Initiator".
1. Navigate to Microsoft's web site ( www.microsoft.com).
2. Search for "Microsoft iSCSI Software Initiator".
3. Download the latest version of the Microsoft iSCSI Software Initiator.
4. When the download is complete, double-click on the installer. Uncheck the "Initiator
Service" and "Software Initiator" checkboxes. Follow the wizard to install the Microsoft
iSCSI Software Initiator.
Install the Microsoft iSCSI Software Initiator
Windows XP/2000、Windows Server 2003/2000 Server
Windows 7/ Vista, Windows Server 2008
If you’re using Windows 7, Vista, or Windows Server 2008, the iSCSI Software Initiator is
already installed on your computer. You don’t need to download and install it.

TeraStation IS Setup Guide 6
Refer to the separate "Quick Setup Guide" for connection instructions.
▼
Turn on your computer
▼
Insert the Utility CD included in the package into the CD/DVD drive
▼
After "TeraNavigator" launches, follow the instructions on the screen.
▼
Launch the iSCSI Hard Disk Connection Tool, click “Register the iSCSI Hard Disk”,
then “Connect”.
Setup
Notes: • If there is a DHCP server in the network, the TeraStation will get an IP address from it automatically.
• Running the TeraNavigator software will automatically assign an unused IP address to a TeraStation.
• TeraNavigator can automatically congure only one unit at a time. To recongure a TeraStation with
TeraNavigator after its initial installation, initialize the TeraStation rst.
• If no DHCP server is available and TeraNavigator is not run, a random IP address of the form 169.254.
xxx.xxx (where each xxx is a random number from 1 - 256) will be assigned to the TeraStation.
If you are using Windows 2000, XP, 2000 Server, or Server 2003, install the "Microsoft
iSCSI Software Initiator" before installing the TeraStation.
Run TeraNavigator separately for each iSCSI TeraStation.
Note: If no DHCP server is available on the network, an IP Address of the form 169.254.xxx.xxx is randomly
assigned. Run TeraNavigator to congure the Terastation automatically.
Adding multiple TeraStations

TeraStation IS Setup Guide 7
Chapter 2
Using the iSCSI Hard Disk Connection Tool
iSCSI Hard Disk Connection Tool
When you set up the TeraStation with TeraNavigator, the iSCSI Hard Disk Connection Tool was installed. You will use
this tool to connect to the TeraStation.
To launch: Click “Start” - “All Programs” - “BUFFALO”-”iSCSI Hard Disk Connection Tool”-”iSCSI Hard Disk Connection
Tool”.
Name Meaning
Target product Select a TeraStation from the drop-down list. Any iSCSI TeraStations on the LAN should be available.
“Register the iSCSI Hard Disk” registers all volumes of the selected TeraStation to your computer.
If a TeraStation is already registered, click “Remove the registered iSCSI Hard Disk” to unregister all
volumes of that TeraStation.
Model Name TeraStation's model name
Series Name TeraStation's series name
IP Address TeraStation's IP address.
Subnet mask TeraStation's subnet mask.
MAC Address TeraStation's MAC address.
Firmware TeraStation's rmware version.
iSCSI Service Shows whether the iSCSI service of the TeraStation is running or stopped.
Volume Select individual volumes from a registered TeraStation.
Select a volume and click “Connect". The selected volume will be recognized as a local drive on your
computer in My Computer.
Volumes will not be visible until the TeraStation is registered above.
If IP address restrictions are set, volumes are displayed only on computers with allowed IP addresses.
If a volume is connected, click “Remove" to disconnect it.

TeraStation IS Setup Guide 8
Current status Displays Current status of the selected volume.
• Not connected. Volume is disconnected.
• Connected. Volume is connected.
• Connected to other computer. Volume is connected to other computer. Displays other computer's IP
address.
*You must register TeraStation as an iSCSI hard drive at “Target product" to display it.
User
Authorization
Displays user authentication for the specied volume.
Disabled: No authentication
Enabled: With authentication. User authentication is needed to connect to a volume.
*You must register TeraStation as an iSCSI hard drive at “Target product" to display it. It is not displayed
when the volume is already connected from other computer.
Connect on
Start Up
Displays check mark in the check box, and click “Connect (or Remove)” to set the volume automatically
connected when the computer is booted (always connected).
Uncheck the check mark and click “Connect (or Remove)” to set the volume automatically not connected
when the computer is booted (always connected).
*You must register TeraStation as an iSCSI hard drive at “Target product" to display it. It is not displayed
when the volume is already connected from other computer.
Refresh Search the TeraStation within the LAN.
Exit Exit iSCSI Hard Disk Connection Tool.
Menu Navigation:
File Refresh Search the TeraStation within the LAN.
Exit Finish iSCSI Hard Disk Connection Tool.
Setup Browse Web setting Opens the Conguration Screen of the selected TeraStation.
Change IP Address Open “Change IP Address” screen. You can change the IP address of the
selected TeraStation.
Remove the registered
iSCSI Hard Disk
Displays “Remove the registered iSCSI Hard Disk” screen.
If you disconnect the TeraStation without unregistering it or changing its IP
address, it will take a long time to search since the registration information
stays in your computer. In such a case, unregister old TeraStation from “Remove
the registered iSCSI Hard Disk” screen.
Set Mutual CHAP Secret Set the CHAP password on the computer side.
Use share folder on a
Persistent Volume
If TeraStation is always connected and folders are shared in the network, click
this to insert the check mark. If the checkmark is not inserted, the share will be
disconnected when the computer is restarted.
Connect some Volumes Displays the screen to connect multiple volume at a time.
Disconnect some
Volumes
Displays the screen to disconnect multiple volume at a time.
Launch “Disk
Management”
Displays the Disk Management screen on Windows.
To use the connected TeraStation, you must reserve the volume area and
format it on the Disk Management Screen.
Help Version Displays iSCSI hard drive version information.

TeraStation IS Setup Guide 9
Disconnecting and Removing TeraStation
To remove an iSCSI TeraStation, disconnect any connected volumes rst and then unregister the TeraStation.
1Click “Start”-”All Programs”-”BUFFALO”-”iSCSI Hard Disk Connection Tool”-”iSCSI Hard Disk
Connection Tool”. The iSCSI Hard Disk Connection Tool will launch.
2
Select the volume to disconnect from “Volume” and click
“Remove”.
Note: To disconnect multiple volumes at once, choose “Remove the Registered iSCSI Hard Disk” from the “Setup”
menu. Click on “Select All”, then “Remove”.
3
Click “Yes” to disconnect the volume(s).

TeraStation IS Setup Guide 10
4
Note: If a TeraStation is connected to multiple computers, unregister it from each computer.
5You can now power down the TeraStation and unplug its cables.
Note: • If you disconnect a TeraStation without unregistering it or changing its IP address, it will
take a long time to search since the registration information is still in your computer.
Use the following procedure to unregister the TeraStation.
1. Launch the iSCSI Hard Disk Connection Tool.
2. Choose “Remove the Registered iSCSI Hard Disk” from the “Setup” menu. .
3. Select the disconnected TeraStation and click “Remove the registered iSCSI Hard
Disk”.
2 Click “Remove the registered iSCSI Hard Disk.”.
1 Select the TeraStation to remove from “Target product”

TeraStation IS Setup Guide 11
Reconnect a TeraStation
To reuse a TeraStation that you previously removed, follow the instructions below to register it and connect a
volume.
1Connect the TeraStation and power it on.
2Click “Start” -”All Programs”-”BUFFALO”-”iSCSI Hard Disk Connection Tool”-”iSCSI Hard Disk
Connection Tool” to open the iSCSI Hard Disk Connection Tool.
3
4
The volume you just connected will be added as a local drive to Computer (My Computer).
Notes:
If a volume is not formatted, it is not added as a local drive. To format, select “Launch Disk Management” from
“Setup” in the iSCSI Hard Disk Connection Tool’s menus.
To connect multiple volumes at once, choose “Connect some Volumes” from the Setup menu.
To connect more than one volume at a time, choose “Connect some Volumes” from the “Setup” menu.
To always connect a volume or volumes, check “Connect on Start Up".
With Windows XP or Windows 2000, you cannot connect to volumes larger than 2 TB. Use Logical Volume
Manager (LVM) to create volumes smaller than 2 TB, then connect.
2 Click “Register the iSCSI Hard Disk”.
Note: If you set access restrictions for “Access Control (Whole System)”
from the “Basic” menu, enter the user name and password to
continue.
1 Select the TeraStation from “Target product”.
2 Click “Connect”.
Note: If you set access restrictions in “iSCSI Volumes”-”Create Volume”-
”Access Control”, enter the user name and password to continue.
1 Select the volume to connect to.

TeraStation IS Setup Guide 12
Mutual Authentication
The iSCSI TeraStation supports mutual authentication for security. Mutual authentication lets a computer
only recognize a TeraStation when the mutual password set on each volume and the mutual authentication
password match. To congure mutual authentication, turn to page 26.
Mutual Authentication password set to the TeraStation (Entire system):
Select “Basic"-”Security” in the conguration utility, and click “Mutual Authentication" from “Access Control" in
“Access Control (Whole System)”. If the password set on the computer matches the volume name in “Volume”,
the iSCSI Hard Disk Connection Tool will be functional.
Note: If the volume name is not displayed in the “Volume” eld, then the mutual authentication password on the
computer does not match. In such a case, select “Setup”, then “Set Mutual CHAP Secret” from in the iSCSI Hard
Disk Connection Tool menu to enter the correct password. Click “Refresh”.
Mutual Authentication password set to each volume:
In the TeraStation Conguration utility, click on “iSCSI Volumes”, then “iSCSI Volumes”. In “Access Control”, click
“Mutual Authentication" and set Password (Mutual Authentication).
The password set here is used to connect to the volume. The mutual authentication password on the computer
must be set to connect to the volume.
Mutual Authentication password set on the Computer Side
If you congure mutual authentication on a TeraStation or individual volumes, enter the same password as you
set on the TeraStation for access restrictions for each volume on the mutual authentication password screen.
The password you entered is maintained as a mutual authentication password on the computer. If there are
multiple volumes, the computer will connect to the volume which has the correct password. You cannot
connect to multiple volumes with different mutual authentication passwords. To connect to a volume with a
different password, you must change the password in the iSCSI Hard Disk Connection Tool menu.
Note: If the mutual authentication password of the TeraStation and that of the volume are different, the volume name
will not be displayed on the main screen in the iSCSI Hard Disk Connection Tool. Select “Setup”, “Set Mutual
CHAP Secret”, “Refresh” to enter the matching password.

TeraStation IS Setup Guide 13
Chapter 3
Conguration
Conguration is done from the TeraStation’s web-based conguration utility.
1Click “Start” - “All Programs” - “BUFFALO” - “iSCSI Hard Disk Connection Tool" - “iSCSI Hard Disk Connection
Tool". The iSCSI Hard Disk Connection Tool will launch.
2
3
4The TeraStation’s web-based configuration utility opens.
1 Enter the username and password.
2 Click “Login”.
If 2 or more TeraStations are connected, select the one to congure.
Write down the TeraStation’s IP Address. Click “Browse Web setting”
from the “Setup” menu.
By default, the username is "admin" and the password is
"password".
Notes: • The configuration utility supports Firefox 1.5 or later,
Internet Explorer 6 SP 2 or later, and Safari 3 or later.
• If proxy is enabled on your browser, the configuration
screen will not be displayed correctly. Disable proxy if it is
enabled.
• Security settings may prevent the configuration utility
from displaying normally. In Internet Explorer, select
“Tools” - “Internet Options” - “Security” and set security to
“Local Intranet”.
• To open the configuration utility from a browser
window, type the TeraStation’s IP address into the URL
field of the browser, then press the “Enter” key. Enter
the username and password as above.

TeraStation IS Setup Guide 14
Chapter 4
Using Logical Volume Manager (LVM)
Enable/Disable Logical Volume Manager (LVM)
Logical Volume Manager (LVM) is disabled by default. Enabling LVM will allow you to divide volumes and
extend capacity, but will degrade access speeds.
Note: Changing the operation mode of a disk or array (such as enabling LVM) will delete all
volumes and data from the disk or array. Back up any important data before making any
configuration changes!
1
2
3The Confirm Operation screen will appear.
Enter the number from the Confirmation Number field and click “Apply” within 60 seconds.
LVM is now enabled.
Select “Disk Area" from the RAID array or the drive, and click
“Enable LVM” or “Disable LVM”.
Conrm Operation
The following tasks open the Confirm Operation screen. To complete the task, type in the
number from the “Confirmation Number” field and click “Apply” within 60 seconds.
• Creating or deleting RAID arrays
• Initialization
• Formatting drives
• Set as a normal drive
• Delete iSCSI volume
• Format Array or Disk
• Unplug hard drives
• Rebuild RAID Array
• Congure hot spare
• Enable or disable LVM
Click “iSCSI Volume"-”LVM” on the TeraStation Configuration
Screen.

TeraStation IS Setup Guide 15
Create Volume
By default, one volume uses all available space on the TeraStation. If you delete the factory volume, you may
create up to 10 volumes. Different volumes can be connected to different computers, but each volume can
only be connected to a single computer.
Notes:
Deleting the default volume will delete all data from the TeraStation. Back up any important data
before making any configuration changes!
Enable LVM (previous page) to delete or create volumes.
1
2
3
4Click “Save”.
5Turn back on the iSCSI service.
Note: To start iSCSI service for the target volume only, navigate to “iSCSI Volumes” - “iSCSI
Volumes”, select the target volume, and click “Active”.
You have created a new volume.
Note: To use the new volume, you need to connect it (page 11), and format it with Windows Disk
Management. You may open Disk Management from the iSCSI hard disk connection tool by clicking
“Launch (Disk Management)" from the “Setup” menu.
Enter “Volume Name", “Volume Description", “Disk Area", and
“Size".
Turn off the iSCSI service on the left side of the screen.
Note: To stop iSCSI service for the target volume only,
navigate to “iSCSI Volumes”-”iSCSI Volumes”, select the
target volume, and click “Inactive”.
Navigate to “iSCSI Volumes" - “iSCSI Volumes". Highlight
the default volume and click “Delete Volume”. Then, click
“Create Volume".

TeraStation IS Setup Guide 16
Extend Volume Space
Volume space can be extended after you create the volume.
Notes: • Extending the volume may delete all data on the volume with some file systems.
Before extending the volume, back up any important data on the volume.
• Before you can extend volumes, you must enable LVM (page 14).
1
2
3
4
5Click “Save” at the bottom of the screen.
6Turn the iSCSI service back on.
Note: To start iSCSI service for the target volume only, navigate to “iSCSI Volumes”-”iSCSI Volumes”, select
the target volume, and click “Active”.
You have now extended the size of a volume.
2 Enter the amount of space to increment the volume in GB.
1 Check the “Enlarge Size” box.
Turn of f the iSCSI Service in the configuration utility.
Note: To stop iSCSI service for the target volume only, navi-
gate to “iSCSI Volumes”-”iSCSI Volumes”, select the
target volume, and click “Inactive”.
Navigate to “iSCSI Volumes" - “iSCSI Volumes".
Click the volume you want to extend.

TeraStation IS Setup Guide 17
Chapter 5
Changing RAID Mode
• RAID 5 array with 4 hard drives (factory default)
Uses 4 hard drives in one array. Parity information for correcting errors is stored, so access speeds are slower than
other RAID modes. Total usable space is the sum of the capacity of 3 drives. If a drive is damaged, you can recover
data on the array by replacing the damaged drive. You cannot recover data if 2 or more drives are damaged.
• RAID 5 array with 3 hard drives
Uses 3 hard drives in one array. Parity information for correcting errors is stored, so access speeds are slower than
other RAID modes. Total usable space is the sum of the capacity of 2 hard drives. The fourth disk may be used as
a hot spare, which replaces a failed drive automatically. If a drive is damaged, you can recover data on the array
by replacing the damaged drive. You cannot recover data if 2 or more drives are damaged.
• RAID 10 array
Uses 4 hard drives in one array. The space you can use is the sum of 2 hard disks' space. Data will be written
speeded and this makes access speed slightly faster. Since same data are written in the 2 hard disks at a same
time, even though one of the paired hard disks (1-2 or 3-4) is damaged, data can be recovered by replacing the
damaged hard disk (if both 1-2 or 3-4 hard disks are damaged, you cannot recover data).
• RAID 1 array
Uses 2 hard drives in a mirrored array. You can create up to 2 RAID 1 arrays. Total usable space on a RAID 1 array
is the capacity of one of the drives. If either drive is damaged, data can be recovered by replacing the damaged
drive. You cannot recover data if both drives are damaged. The other two drives not used in the RAID 1 array
may be used as hot spares which replace failed drives automatically, or as a second RAID 1 array, or as individual
drives. Or, one may be congured as an individual drive and the other as a hot spare.
Note: After replacing a failed drive in any of the above arrays, le transfer speeds will be slower for several
hours while the RAID array is being rebuilt. During this period, the front LED display will show “RAID ARRAYx
Resyncing”.
Out of the box, your TeraStation is congured with all four hard drives in a RAID 5 array. Many other RAID array modes are
available.
Notes:
・ All data on your drive will be deleted if you change the RAID mode. Back up any important data before
changing RAID modes.
・In this document, "Recovery" means restoring the TeraStation back to the state it was in before a drive failure. It
does not refer to reading data from broken hard disks.

TeraStation IS Setup Guide 18
• RAID 0 array
Combines 4 drives into one fast array. The full capacity of all drives combined is available for use. RAID 0 is fast
and efcient, but includes no parity or redundancy. If any drive is damaged, all data on the array is lost.
• Normal mode
In Normal mode, drives are not combined into arrays. Each drive is individually available. The full capacity of
each drive is usable. If a drive is damaged, all data on that drive is lost.

TeraStation IS Setup Guide 19
Conguring Normal mode
1
2
3Click “Delete RAID Array”. This will take several seconds, and the front panel display will show "RAID
ARRAY x Creating".
4When "Are you sure you want to change the RAID mode?" is displayed, click “Apply".
5The Confirm Operation screen will appear. Type in the confirmation number and click “Apply” within 60
seconds.
6Follow the instructions displayed on the screen.
You have congured Normal mode. Refer to page 15 to create volumes on the four drives. Use Windows Disk
Management to format the volumes on the drives, then connect to the formatted volumes with the iSCSI hard
disk connection tool and use them as local drives on your computer.
Choose the array to change.
In the configuration utility, click “Basic” - “Storage” - "RAID Array”.