D-Link xStack Storage DSN-4000 Series Operating and maintenance manual

D-Link xStack Storage iSCSI SAN Array
Managed SAN Solution
DSN-4100, DSN-4200 and DSN-4000
Hardware Reference Guide
Version 1 0
xStack Storage
TM

ii

Copyright
D-Link Systems, Inc. makes no warranty of any kind with regard to this material, including,
but not limited to, the implied warranties of merchantability and fitness for a particular
purpose. D-Link Systems, Inc. shall not be liable for errors contained herein or for incidental
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should be construed as constituting an additional warranty. D-Link shall not be liable for
technical or editorial errors or omissions contained herein.
Copyright © 2011 D-Link Systems, Inc. ™; All Tights Reserved
Patents and Trademarks
Includes one or more of the following United States patents: 6,941,396; 7,353,306;
7,389,462; 7,460,473; 7,512,663 and 7,594,002. Other patents are pending.
D-Link and the D-Link logo are registered in U.S. Patent and Trademark Office. All other
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All other brand or product names are or may be trademarks or service marks, and are used
to identify products or services, of their respective owners.
Important data protection information
You should back up all data before installing any drive controller or storage peripheral. D-
Link is not responsible for any loss of data resulting from the use, disuse or misuse of this or
any other D-Link product.
Notice and Recommendations
Although D-Link has attempted to ensure the accuracy of the content of this manual, it is
possible that this document may contain technical inaccuracies, typographical, or other
errors. D-Link provides this publication “as is” without warranty of any kind, either express
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D-Link assumes no liability for any error in this publication, and for damages, whether
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product design, layout, and driver revisions without notification to its users.
This version of this manual supersedes all previous versions.

iv Contents
Safety Information
This product uses a lithium coin cell battery. The lithium coin cell battery is a long-life
battery, and it is very possible that you will never need to replace it. However, should you
need to replace it, please consult your service documentation.
There is a danger of a new battery exploding if it is incorrectly installed.
Replace the battery pack only with the same or equivalent type recommended
by the manufacturer. Do not dispose of the battery along with household waste.
Contact your local waste disposal agency for the address of the nearest battery
disposal site.
CAUTION
RISK OF EXPLOSIO IF BATTERY IS REPLACED BY A I CORRECT TYPE. DISPOSE OF USED
BATTERIES ACCORDI G TO THE I STRUCTIO S.
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Export of technical data contained in this document may require an export license from the
United States government. Please contact D-Link, Inc. for any export compliance questions.
Document Revision Level
Revision Date Description
1.0 August 24, 2011 Initial release.

DSN-4000 Series Hardware Reference Guide v
Preface
This document is intended to assist users with installing the primary array and expansion
array of the xStack Storage DS -4000 Series storage system from D-Link, Inc. This document
assumes that users are computer literate, familiar with storage array products, and have a
basic understanding of storage products and concepts. Throughout this document, the term
“DS -4000 series” or “DS -4X00” refers to all of the members of the DS -4000 Series
product family, whereas a reference to a specific model will appear as DS -4100, DS -4200
or DS -4000. For clarity, some illustrations may only show the DS -4200 enclosure, but the
concepts are applicable to all models.
Typographic Conventions
Notes
otes provide information that deserves special attention. They are preceded by:
Cautions
Cautions contain information which, if not followed, can cause damage to the
storage system and possible loss of data. They are preceded by:
Warnings
Warnings contain information which, if not followed, can cause damage to the
storage system and to the person installing it. They are preceded by:
Related Documentation
In addition to this document, the following documents are available from D-Link.
 xStack Storage Management Center Software User's Guide. This guide provides the
information needed to configure and manage storage on the xStack Storage system using
the xStack graphical user interface.

vi Contents
Contact Information
You can find software updates and user documentation on the D-Link website.
D-Link provides free technical support for customers within the United States and within
Canada for the duration of the warranty period on this product.
U.S. and Canadian customers can contact D-Link Technical Support through our website, or
by phone.
Tech Support for customers within the United States:
D-Link Technical Support over the Telephone
Please see our support site for current number:
• http://support.dlink.com
• Monday to Friday 8:00am – 5:00pm PST/PDT
D-Link Technical Support over the Internet:
• http://support.dlink.com
Tech Support for customers within Canada:
D-Link Technical Support over the Telephone
Please see our support site for current number:
• http://support.dlink.ca
• Monday to Friday 7:30am to 9:00pm EST/EDT
D-Link Technical Support over the Internet:
 http://support.dlink.ca

DSN-4000 Series Hardware Reference Guide vii
Contents
Chapter 1 Introduction 1
1.1 Models ............................................................................................... 1
1.2 Features and Benefits ............................................................................. 2
1.3 System Overview ................................................................................... 2
Chapter 2 DSN-4000 Series Primary Array Layout 3
2.1 Front Panel Components ......................................................................... 4
2.2 Rear Panel Components .......................................................................... 6
2.3 Side, Top and Bottom Panel Components ..................................................... 9
Chapter 3 Installing the DSN-4X00 Primary Array 11
3.1 Site Considerations ............................................................................... 12
3.1.1 General Considerations .................................................................. 12
3.1.2 Desktop or Shelf Installation ............................................................ 12
3.1.3 Rack-mount Guidelines ................................................................... 13
3.2 Safety Considerations ............................................................................ 13
3.3 Unpacking the DS -4X00 Primary Array ....................................................... 14
3.4 Items Supplied by the User ..................................................................... 14
3.5 Installing the Hard Disk Drives .................................................................. 15
3.6 Connecting to the iSCSI Data Ports ............................................................ 16
3.7 Connecting to the Management Port .......................................................... 16
3.8 Connecting the AC Power Cords ................................................................ 18
3.9 Connect any DS -4000 JBOD Expansion Arrays (optional) ................................. 18
3.10 Powering-on the DS -4000 JBOD Expansion Arrays ......................................... 19
3.11 Powering-on the DS -4X00 Storage Array .................................................... 20
3.12 Hot-Plugging Additional DS -4000 JBOD Expansion Arrays ................................ 20
Appendix A Replacing and Upgrading FRUs 21
A.1 Installing or Removing Hard Disk Drives ...................................................... 22
A.2 Replacing a Power Supply Module ............................................................. 23
A.3 Replacing a Cooling Fan Module ................................................................ 24
A.4 Replacing the Controller Module in the Primary Array ..................................... 25
A.5 Replacing the Cache Battery Backup Module ................................................ 26
A.6 Connecting to the Diagnostic Serial Port ..................................................... 27
Appendix B Installing the System in a Rack 29

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DSN-4000 Series Hardware Reference Guide 1
Chapter 1 Introduction
The xStack Storage DS -4000 series storage system is an intelligent, high-performance
multiple Gigabit Ethernet storage solution designed for businesses that want to improve the
reliability, availability, serviceability, and performance of their storage systems. It provides
a range of benefits and features from its ability to use familiar, proven, and widespread
networking technologies like IP and Ethernet for storage solutions.
The DS -4000 series storage system is highly scalable. To add more storage capacity, simply
add additional DS -4000 expansion arrays to the DS -4X00 primary array for up to 80 drives.
This plug-and-play approach to storage expansion enables you to form a scalable enterprise
storage grid of many drives quickly and easily.
Based on an Internet Protocol-Storage Area etwork (IP-SA ) architecture, the DS -4X00
primary array is built around D-Link’s iSCSI RAID processor system-on-a-chip and has the
following features:
 Up to 80 Serial Attached SCSI (SAS) or Serial Advanced Technical Attachment (SATA) hard
disk drives per system (including DS -4000 expansion arrays), with a maximum storage
capacity of 2TB per drive
 A minimum of 512 MB of System Memory, expandable to 2GB
 A minimum of 1024 MB of Buffer Memory, expandable to 4 GB
 iSCSI Ethernet Connectors (depending on your specific hardware configuration):
 Eight 1-Gigabit RJ-45 connectors
 Four 1-Gigabit RJ-45 connectors
 A 10/100/1000 Mbps Ethernet management port
 One SAS expansion connector for attaching additional DS -4000 JBOD expansion arrays
 One 3.5mm RS-232-C stereo mini-jack diagnostic port for troubleshooting purposes
Complete configuration and management of the storage system are available through the
intuitive, graphical-based Management Center software.
1 1 Models
The D-Link xStack Storage DS -4000 series storage array is available in various models. The
models differ according to the speed and host network interface, as well as the number of
drive bays. Table 1-1 lists the various DS -4X00 Primary Array models.
Table 1-1 DSN-4X00 Primary Array Models
Model
Drive
Bays iSCSI Data Ports iSCSI Data Port Speed
DSN-4200 16 Eight RJ-4 ports 1 Gigabit per second
DSN-4100 16 Four RJ-4 ports 1 Gigabit per second

2 Chapter 1 Introduction
1 2 Features and Benefits
 High-performance, low-latency iSCSI storage system, with a highly integrated
multifunction ASIC for fully featured, integrated storage virtualization
 Modular design with the ability to add hot-swappable DS -4000 expansion arrays for up
to 80 drives, with each drive having a maximum storage capacity of up to 2TB
 Easy setup and configuration – can be installed anywhere on a 1-Gigabit Ethernet
network for improved access to critical information
 In-band or out-of-band management via direct connection or the Web
 Delivers Ethernet economics to storage for lower total cost of ownership and rapid
deployment using known and trusted technologies
 Proven transport infrastructure for increased reliability, investment protection, and
reduced training and administrative costs
 Scalability over long distances - ideal for remote data replication and disaster recovery
 High availability - redundant cooling fans and 2 redundant, hot-swappable, auto-sensing,
load-sharing power supplies
 Intelligent battery pack ensures that a charged battery is on hand to preserve buffer
cache contents if a power failure occurs. Contents are backed up for approximately 72
hours with the standard 2GB data cache (48 hours with the 4GB data cache option).
1 3 System Overview
Figure 1-1 shows a typical DS -4X00 storage system configuration in a Storage Area etwork
(SA ). The SA shown is an Ethernet network used solely for exchanging data between the
customer's host servers and the DS -4000 series array. The Ethernet bandwidth used by the
servers exchanging data with the storage system can be very high. Using a separate
Ethernet to act as a SA keeps that data from interfering with the customer's existing LA
and improves security.
Figure 1-1 Example of a DSN-4000 Series Storage System Configuration

DSN-4000 Series Hardware Reference Guide 3
Chapter 2 DSN-4000 Series Primary Array Layout
This chapter describes the hardware components on the DS -4X00 primary array. The topics
covered in this chapter are:
 Section 2.1, Front Panel Components
 Section 2.2, Rear Panel Components
 Section 2.3, Side, Top and Bottom Panel Components

4 Chapter 2 essRAID 1836i/1846i Series Primary Array Layout
2 1 Front Panel Components
The front of the DS -4X00 primary array enclosure has the following components (see Figure
2-1):
 Enclosure Status LEDs - the enclosure LEDs at the right side of the front panel provide
status information about the DS -4X00i primary array enclosure, as shown in Figure 2-1.
For a description of these LEDs, see Table 2-1.
 Dri e Slots – the front panel provides access to 16 drive slots (depending on your specific
model), as shown in Figure 2-4.
 Dri e Carriers – hard disk drives are mounted on a drive carrier for easy insertion or
removal. The drive carriers have a squeeze lever for installing and removing drives, and
two status LEDs (see Figure 2-3 and Table 2-2). Each drive carrier has a corresponding
drive slot number (see Figure 2-4). Drive carriers must be installed in all drive slots that
are not occupied by a hard disk drive to maintain proper air flow for cooling the system.
Figure 2-1 Front View of the DSN-4X00 Primary Array
Figure 2-2 Detailed View of Enclosure LEDs
Enclosure
LEDs
(see Figure 2-2
and Table 2-1
for detailed
information)
Drive Carriers
Drive Carrier
(see Figure 2-
3
for detailed view)

DSN-4000 Series Hardware Reference Guide 5
Table 2-1 Enclosure LEDs
LED Description
Power Green: Indicates that the primary array is powered on.
Global Enclosure Status Green: Indicates that the primary array is powered on and functioning.
Red: Indicates that a fault condition exists and requires user attention
Controller Activity Flashing Green: Indicates that there is system activity
System Heartbeat Flashing Green: While the system is operating normally, this LED blinks seven (7) times, then
turns off for approximately 4 seconds, then repeats with a total cycle time of 8 seconds
Figure 2-3 Detailed View of the Drive Carrier
Table 2-2 Drive Carrier Status LEDs
LED Description
Disk Status Off: No hard disk is present.
Green: The hard disk is powered on and available.
Red: The hard disk has failed and should be replaced.
Power/Activity Off: The disk is idle or no disk is present.
Flashing Green: A hard disk is present and there is disk activity.
Figure 2-4 Drive Slot Numbers on the DSN-4X00 Primary Array

6 Chapter 2 essRAID 1836i/1846i Series Primary Array Layout
2 2 Rear Panel Components
The rear panel of the DS -4X00 primary array has the following components (see Figure 2-5
through Figure 2-8):
 Management port (Mgmt) - one 10/100/1000 RJ-45 management is located to the left of
the iSCSI data ports. The management port includes port speed and port activity LEDs.
For more information, refer to Table 2-3.
 Four or eight 1-Gigabit RJ-45 iSCSI data ports are located on the rear panel of the DS -
4X00 controller module. Each iSCSI data port has port speed and port activity LEDs. For
more information, refer to Table 2-4.
 Diagnostic port (10101/DIAG) - one 115.2 Kbps RS-232-C diagnostic port (3mm stereo
mini-jack) is located above the top-right corner of the management port. To connect to
this port, use the special RS-232 serial diagnostic cable that was included with your DS -
4X00 primary array.
 Expansion port (SAS EXP) – one SAS expansion port is located to the right of the iSCSI
data ports. This connector allows you to attach additional DS -4000 JBOD expansion
arrays to the primary array to increase the system’s total storage capacity (see Section
3.9 for more information).
 RESET button is located above the SAS Expansion port. This button allows you to
explicitly restart the system. For more information, refer to Table 2-5.
 MUTE button is located above the SAS Expansion port. This button allows you to silence
the audio alarm when a fault condition has occurred. For more information, refer to
Table 2-5.
 The Controller and Cache Status LEDs are located above the Management Port (see Table
2-6).
 Battery and Fan Status LEDs are located to the left of the Serial Diagnostic Port, and the
SAS Expansion Port Status LED is located above the SAS Expansion Port (see Table 2-6).
The rear panel of the DS -4X00 primary array enclosure has two AC power receptacles and
two power switches. For an explanation of the power receptacles and power switches, see
Section 3.8.
Figure 2-5 Rear View of the DSN-4200 Primary Array
Controller Module
Redundant AC Power
Supplies
Power Switches (2)
Power Supply Status LEDs (2)

DSN-4000 Series Hardware Reference Guide 7
Figure 2-6 Detailed View of the DSN-4200 Controller Module
Figure 2-7 Detailed View of 8-port DSN-4200 Controller Rear Panel
Figure 2-8 Detailed View of 4-port DSN-4100 Controller Rear Panel
Table 2-3 Management Port LEDs
LED Description
Port Activity Flashing Amber: Data is being sent or received
Off: No data is being sent or received
Link Speed Green: Network link is operating at 1000 Mbps
Red: Network link is operating at 100 Mbps
Off: No network link is detected
Reset Button
Mute Audio Alarm Button
Battery and Fan
Status LEDs
Dirty Cache LED
Management Port
Controller Status LED
RS
-
232 Serial Diagnostic Port
Hot-Swappable
Fan Module
Hot-Swappable
Fan Module
Ejection Lever
SAS
Expansion
Port
iSCSI Data Ports
and Status LEDs
SAS Expansion Port Status

8 Chapter 2 essRAID 1836i/1846i Series Primary Array Layout
Table 2-4 1-Gigabit iSCSI Data Port LEDs
LED Description
Port Activity Flashing Green: Data is being sent or received
Off: No data is being sent or received
Link Speed Green: Network link is operating at 1000 Mbps
Amber: Network link is operating at 100 Mbps
Off: No network link is detected
Table 2-5 Rear Panel Buttons and Switches
Switch or Button Description
Power Turns on the power to the DSN-4X00 primary array. There are two power switches, and both switches must
be turned on.
RESET Resets the system. This switch is recessed to prevent accidental resets, which could cause loss of data.
MUTE Mutes the audio alarm when a fault condition has occurred. Refer to Table 2-7 for a list of fault conditions
that will cause the audio alarm to sound.
Table 2-6 Rear Panel LEDs
Icon Description LED Conditions
Controller
Status
Green: The controller is operating normally.
Red: The controller encountered a failure condition that requires some corrective action
Off: The controller is powered-off or not ready.
Dirty Cache Flashing Green: The battery is maintaining cache memory when the system is powered off or
when a system fault condition has occurred.
Off: The cache memory is functioning normally.
Battery Status Solid Green: The battery is present and fully charged.
Flashing Green: The battery is charging.
Solid Red: The battery is failed or not present.
Off: The system is powered-off or not ready.
Cooling Fan
Status
(one for each
fan module)
Green: The fan is running properly.
Red: The fan has failed or is missing, and should be replaced as soon as possible.
Off: Unknown fan status.
None SAS Expansion
Port Status
Flashing Green: There is activity on the SAS Expansion Port.
Off: The SAS Expansion Port is not active.
None Power Supply
Status
Green: The power supply module is powered-on and functioning correctly.
Amber or Red: The power supply module has failed.
Off: The power supply module is powered-off or the AC power cord is disconnected.

DSN-4000 Series Hardware Reference Guide 9
Table 2-7 Failure Conditions that Activate the System Fault LED and Audio Alarm
Failure Condition Description and Additional Information
Power Supply Failure The Global Enclosure Status LED and Controller Status LED will be illuminated in red and the audio
alarm will sound.
Cooling Fan Failure The Global Enclosure Status LED and Controller Status LED will be illuminated in red and the audio
alarm will sound.
Battery Failure The Global Enclosure Status LED and Controller Status LED will be illuminated in red and the audio
alarm will sound. A system shutdown and restart are required after the failed battery has been replaced.
Over Temperature The Global Enclosure Status LED and Controller Status LED will be illuminated in red and the audio
alarm will sound.
Software Failure The Global Enclosure Status LED and Controller Status LED will be illuminated in red and the audio
alarm will sound.
2 3 Side, Top and Bottom Panel Components
The left and right sides of the DS -4X00 enclosure do not require any special hardware for
rack-mounting the unit. Instead the enclosure simply slides into the rails that are supplied
with the system. Product information and regulatory agency labels can be found on the top
surface of the unit. For rack-mount instructions, refer to Appendix B and the documentation
for your rack.

10 Chapter 2 essRAID 1836i/1846i Series Primary Array Layout
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DSN-4000 Series Hardware Reference Guide 11
Chapter 3 Installing the DSN-4X00 Primary Array
This chapter describes how to install the DS -4X00 primary array. The topics covered in this
chapter are:
 Section 3.1, Site Considerations
 Section 3.2, Safety Considerations
 Section 3.3, Unpacking the DS -4X00 Primary Array
 Section 3.4, Items Supplied by the User
 Section 3.5, Installing the Hard Disk Drives
 Section 3.6, Connecting to the iSCSI Data Ports
 Section 3.7, Connecting to the Management Port
 Section 3.8, Connecting the AC Power Cords
 Section 3.9, Connect any DS -4000 JBOD Expansion Arrays (optional)
 Section 3.10, Powering-on the DS -4000 JBOD Expansion Arrays
 Section 3.11, Powering-on the DS -4X00 Storage Array

12 Chapter 3 Installing the DSN-4000 Series PrimaryArray
3 1 Site Considerations
The site where you install the DS -4X00 storage array can affect its performance. Therefore,
choose a site that conforms to the requirements in the following sections.
3 1 1 General Considerations
Observe the following considerations when selecting a location to install the DS -4X00
storage array.
 The location should be fairly cool and dry for the acceptable temperature and humidity
ranges.
 The location should be free of strong electromagnetic field generators (such as motors),
vibration, dust, and direct exposure to sunlight.
 The location must provide sufficient airflow to the front and back of the DS -4X00
storage array for correct cooling. Ventilation must be sufficient to exhaust heat from the
rear of the equipment.
 The location should offer two AC power outlets within six feet (1.82 meters) of the DS -
4X00 storage array. Ideally, the two power outlets should be on separate circuits for
optimum power redundancy.
 The location should allow for at least six inches (15.2 cm) of space at the front and back
of the DS -4X00 storage array for ventilation.
 Do not place the DS -4X00 storage array next to, on top off, or below any device that
generates a significant amount of heat or will block the free flow of air through the DS -
4X00 storage array ventilation slots.
3 1 2 Desktop or Shelf Installation
The DS -4X00 storage array can be mounted on a desktop or shelf. Observe the following
considerations for desktop or shelf installations.
 Select a sturdy, level surface that can support the DS -4X00 storage array. A fully
populated unit weighs approximately 35 pounds (15.8 kg) with 16 drives or 28 pounds
(12.6 kg) with 12 drives (assuming 1.1 pound / 0.5 kg per drive).
 Allow enough ventilation space between the DS -4X00 storage array and any other
objects in the vicinity.
 Be sure not to block the air vents on the front and back of the DS -4X00 storage array
enclosure. Install the cables and power cords according to the procedures in the
following sections.