Western Digital Sentinel RX4100 Operating manual

WD Sentinel RX4100
Small Business Storage Server
Administrator and Maintenance Guide
™

WD®Service and Support
Should you encounter any problem, please give us an opportunity to address it before returning this
product. Most technical support questions can be answered through our knowledge base or email
support service at http://support.wd.com. If the answer is not available or if you prefer, please
contact WD at the best telephone number shown below.
WD Guardian™ Services premium Technical Support and Extended Warranty services are also
available for Small Business Customers. Contact WD Technical support at http://support.wd.com
for information about this extra level of support and how to obtain it.
Your product includes 30 days of free telephone support during the 3-year standard limited warranty
period. This 30-day period starts on the date of your first telephone contact with WD Technical
Support. Email support is free for the entire warranty period and our extensive knowledge base is
available 24/7. To help us keep you informed of new features and services, remember to register
your product on the Registration page on the user interface or online at http://register.wd.com.
WD Guardian Services
When you need a little help from an expert, we’ll take care of you! WD Guardian Services offers
flexible, affordable and hassle-free technical support and extended warranty plans with a variety of
benefits. Choose the plan that works best for your business. Visit www.wdguardian.com for details.
Accessing Online Support
Visit our product support website at http://support.wd.com and choose from these topics:
•Downloads - Download drivers, software, and updates for your WD product.
•Registration - Register your WD product to get the latest updates and special offers.
•Warranty & RMA Services - Get Warranty, Product Replacement (RMA), RMA Status, and
Data Recovery Information.
•Knowledge Base - Enter keyword, phrase, answer ID, or PID.
•Installation - Get manuals, installation guides, and documentation for your WD product.
•WD Community - Share your thoughts and connect with other WD users.

Contacting WD Technical Support
When contacting WD for support, have your WD product serial number, system hardware, and
system software versions available.
Registering Your WD Product
Register your WD product to get the latest updates and special offers. You can easily register your
product on the user interface of the product software or online at http://register.wd.com.
United States & Canada Europe
United States 855.556.5117 Belgium 00 80021102110
Canada 855.556.5117 Cyprus 00 80021102110
Czech Republic 00 80021102110
Mexico & South America Denmark 009 80021102110
Argentina 00 80021102110 Estonia 00 80021102110
Brazil 0021 80021102110 Finland 990 80021102110
999 80021102110
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Grenada 00 80021102110 Germany 00 80021102110
Panama 00 80021102110 Greece 00 80021102110
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Africa Israel 014 80021102110
South Africa 09 80021102110 Italy 00 80021102110
Luxembourg 00 80021102110
Asia Pacific Netherlands, The 00 80021102110
Australia 0011 800.2110.2110 Norway 00 80021102110
China 00 800.2110.2110 Poland 00 80021102110
Hong Kong 001 800.2110.2110 Portugal 00 80021102110
Japan 010 800.2110.2110 Sweden 00 80021102110
Malaysia 00 800.2110.2110
(Telekom Malaysia IDD)
Swiss Confederation, The 00 80021102110
New Zealand 00 800.2110.2110 United Kingdom, The 00 80021102110
Philippines 00 800.2110.2110
Singapore 001 800.2110.2110
(Singtel IDD)
Taiwan 00 800.2110.2110
(Chunghwa IDD)
Thailand 001 800.2110.2110

TABLE OF CONTENTS – i
WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
WD®Service and Support ................................ii
WD Guardian Services ...................................ii
1 Important User Information ....................1
Important Safety Instructions ..............................1
Handling Precautions ....................................2
Recording Your WD Product Information .....................2
About This Guide .......................................2
2 Product Overview ............................3
Getting to Know Your WD Sentinel RX4100 Server .............3
Key Features ..........................................3
System Requirements and Compatibility Information ............7
Technical Specifications..................................8
Product Views .........................................9
Indicators............................................10
Where to Find Help ....................................12
3 Connecting the Server and Getting Started ......13
User Roles and Responsibilities ...........................13
How the WD Sentinel RX4100 Fits into Your Office ............15
Connecting the WD Sentinel RX4100 Server to Your Network
(Preferred Method) ..................................15
Connecting the WD Sentinel RX4100 Server from a Client
Computer (Optional Method)...........................16
Setting up your WD Sentinel Server (one time only) ............17
Connecting your Computers .............................20
Rebooting the WD Sentinel Server .........................26
4 Managing the WD Sentinel Server (Dashboard) . . 28
Setting up WD Sentinel Server & Connecting Computers........28
Accessing the Dashboard ...............................28
Adding a User Account .................................31
Performing Dashboard Tasks.............................33
Using the Home Page ..................................33
Managing User Accounts ...............................34
Managing Computers and Backups .......................35
Managing Server Folders and Hard Drives ..................35
Monitoring Add-ins ....................................35
Table of Contents

TABLE OF CONTENTS – ii
WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Monitoring System Health and Alerts ......................35
Updating Software .....................................39
Managing Server Settings ...............................43
Shutting Down the Server ...............................45
5 Managing Storage on the WD Sentinel Server ....46
WD Sentinel Server RAID Storage .........................46
Using USB Storage ....................................47
6 Using the WD Sentinel Server’s Features .......49
Using the Launchpad (Internal Users) .......................49
Accessing Shared Folders Over Your Network................56
Accessing Computers and Shared Folders Remotely...........57
Backing up (Windows PC) ...............................58
Backing up with Time Machine (Mac) .......................61
Recovering/Restoring (Windows PC) .......................64
Recovering/Restoring (Mac) ..............................65
Backing up your WD Sentinel Server .......................66
Recovering the WD Sentinel Server to Factory Defaults .........66
7 Best Practices ..............................81
Setting up the WD Sentinel RX4100........................81
Setting up Client Computers .............................81
Using the WD Sentinel RX4100 Efficiently ...................81
Replacing Drives ......................................82
Sharing Files with External Users ..........................82
Shutting Down ........................................82
8 Troubleshooting ............................83
First Steps Checklist ...................................83
Specific Problems and Corrective Actions ...................83
9 Managing iSCSI Storage .....................85
iSCSI Overview .......................................85
iSCSI Roles ..........................................85
Managing iSCSI Targets.................................85
10 Regulatory and Warranty Information...........90
Regulatory Compliance .................................90

TABLE OF CONTENTS – iii
WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Limited Warranty ......................................92
GNU General Public License (“GPL”) .......................93
11 Appendix ..................................94
Hardware Replacement Procedures........................94
Before You Begin......................................94
Installing the WD Sentinel Bezel ...........................95
Replacing a Hard Drive .................................96
Removing the Unit Cover ................................98
Replacing the Internal Power Supply ......................100
Replacing a Server Fan ................................102
Replacing the Riser Card ...............................104
Replacing the Mid-plane Card ...........................105
WD Sentinel RX4100 Administrator Reference Sheet ..........106
12 Index.....................................107

1
IMPORTANT USER INFORMATION
1
WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Important User Information
Important Safety Instructions
Handling Precautions
Recording Your WD Product Information
About This Guide
Important Safety Instructions
This device is designed and manufactured to assure personal safety. Improper use can
result in electric shock or fire hazard. The safeguards incorporated into this unit will protect
you if you observe the following procedures for installation, use, and servicing.
Follow all warnings and instructions marked on the product.
Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or
aerosol cleaners. Use a damp cloth for cleaning.
Do not use this product near any liquids.
Do not place this product on an unstable surface. The product may fall, causing serious
damage to the product.
Do not drop the product.
Do not block the slots and openings on the back or bottom side of the chassis; to
ensure proper ventilation and reliable operation of the product and to protect it from
overheating, these openings must not be blocked or covered. Making sure the server is
standing upright also helps prevent overheating.
Operate this product only from the type of power indicated on the marking label. If you
are not sure of the type of power available, consult your dealer or local power company.
Do not allow anything to rest on the power cord. Do not locate this product where
persons will walk on the cord.
If an extension cord is used with this product, make sure that the total ampere rating of
the equipment plugged into the extension cord does not exceed the extension cord
ampere rating. Also, make sure that the total rating of all products plugged into the wall
outlet does not exceed the fuse rating.
Never push objects of any kind into this product through the chassis slots as they may
touch dangerous voltage points or short out parts that could result in a fire or electric
shock.
Unplug this product from the wall outlet and refer servicing to qualified service personnel
under the following conditions:
-When the power cord or plug is damaged or frayed.
-If liquid has been spilled on the product.
-If the product has been exposed to rain or water.
-If the product does not operate normally when the operating instructions are fol-
lowed. Adjust only those controls that are covered by the operating instructions
since improper adjustment may result in damage and require extensive work by a
qualified technician to return the product to normal condition.
-If the product has been dropped or the chassis has been damaged.

IMPORTANT USER INFORMATION
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
-If the product exhibits a distinct change in performance, contact WD Customer Sup-
port at http://support.wd.com.
Handling Precautions
WD products are precision instruments and must be handled with care during unpacking
and installation. The WD Sentinel server may be damaged by rough handling, shock, or
vibration. Be aware of the following precautions when unpacking and installing your external
storage product:
Do not drop or jolt the WD Sentinel server.
Do not move the unit while it is powered on.
Do not use this product as a portable drive.
Recording Your WD Product Information
Remember to write down the following WD product information, which is used for setup and
technical support. Your WD product information is found on the label on the bottom of the
device.
Serial Number
Model Number
Purchase Date
System and Software Notes
About This Guide
This Administrator and Maintenance Guide provides detailed instructions and information for
WD-specific interface elements and functions. Unless otherwise noted, refer to
Microsoft®Online Help for standard interface elements and functions. This guide uses the
following conventions:
WARNING! The WD Sentinel™Server uses a lithium battery, type CR2032. There
is danger of an explosion if the battery is incorrectly replaced.
Replace only with the same or equivalent battery type recommended
by the manufacturer. Dispose of used batteries according to the
manufacturer’s instructions.
Convention Used for ...
Bold font Names of items on a page such as menus, buttons, option names, fields, and
tabs that the user must click or complete and keys the user must press.
Note: Extra, but not vital, information
Important: Essential Information to know or to prevent problems when using the
WD Sentinel server
WARNING! Vital information for operating the WD Sentinel server or to prevent damage to
the server or your computer.

2
2
PRODUCT OVERVIEW
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Product Overview
Getting to Know Your WD Sentinel RX4100 Server
Key Features
System Requirements and Compatibility Information
Technical Specifications
Product Views
Indicators
Where to Find Help
Getting to Know Your WD Sentinel RX4100 Server
Congratulations on your purchase of the WD Sentinel RX4100 Small Business Storage
Server. Whether you’re an IT expert or not, WD Sentinel RX4100 is easy to install and
provides secure unified storage (NAS and iSCSI SAN), complete data protection for up to 25
computers, and remote file access for your employees and trusted vendors while in the
office or from anywhere.
Key Features
Easy installation: The easy setup process allows you to integrate WD Sentinel RX4100 into
your office network like a pro. The administration dashboard quickly guides you through the
process including adding users, setting up data access, creating shared folders, and
scheduling backups.
Easy administration: WD Sentinel RX4100 is the ideal storage server for small business in
1U rack mountable design. Its easy administration features include four drive bays with hot
swappable design; redundant user-serviceable power supplies; user-serviceable fans and
email alerts. In the event that an IT professional’s assistance is needed, the WD Sentinel
RX4100 allows them to manage the server remotely. Now that’s easy!
Comprehensive data protection for your entire office has never been easier.
The drives inside: Pre-configured with hard drives optimized for reliability, quality and
performance.
RAID: Pre-configured with RAID 5 for added data protection and drive redundancy.
Automatic backup and restore software for Windows®clients: The included
backup software saves time and space by performing a full Bare Metal Backup the first
time and then automatically backing up only the data that has changed since the
previous backup – using block-level deduplication technology. In the event of a data loss
or a drive failure on a client computer, the WD Sentinel RX4100’s fast and easy restore
function finds your files or lets you restore an entire system to get you up and running
again quickly.
Time Machine backup support for Mac OS®clients: WD Sentinel RX4100 offers
seamless support for backing up Mac OS clients to your WD Sentinel server using the
Apple Time Machine backup utility.
Dual Ethernet ports: Comes pre-configured in Adaptive Fault Tolerance, which keeps
your network available by automatically switching to the second Ethernet port if the first
one should fail.

PRODUCT OVERVIEW
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Optional dual power supply: WD Sentinel RX4100 offers the small business owner the
option of adding a redundant external power supply that will take over should a power
surge or other failure damage the internal power supply. With the optional external
power supply you have the added peace of mind knowing that your system will remain
operational and available.
Optional off-site disaster recovery protection: Protect your business data against a
disaster by creating an off-site copy to the cloud using KeepVault®*. Learn more at
wdc.keepvault.com.
Secure remote access: WD Sentinel RX4100 is perfect for businesses with employees
working remotely or in home offices. You have the security of knowing all your business files
are safely stored on your WD Sentinel RX4100 small business storage server. With built-in
secure remote access, remote employees, contractors, or clients with access permissions
can securely access business data from any computer with an Internet connection.
Leading-edge performance: With dual Gigabit Ethernet connectivity, WD Sentinel
RX4100 delivers read speeds up to 105 MB/s through the Gigabit Ethernet interface. That's
three times faster than most network drives in this category today.
Note: As tested using a file transfer simulator using two sets of large files averaged over 10 runs.
Fully Compatible with Mac OS Clients: WD Sentinel RX4100 supports Apple®Filing
Protocol (AFP), which provides complete compatibility for Mac OS-based client machines.
Discover WD Sentinel RX4100 automatically using Bonjour®, seamlessly back up your Mac
OS clients using Apple’s Time Machine®backup utility, enjoy faster data transfer over
Ethernet using AFP, and manage your WD Sentinel RX4100 server using the Administration
Dashboard application for Mac.
Virtualize WD Sentinel storage using iSCSI Target: WD Sentinel RX4100 offers built-in
iSCSI target functionality integrated within Dashboard to easily manage the setup,
administration and deployment of iSCSI Storage. IT Pro’s and advanced users have the
ability to partition their WD Sentinel RX4100 for both NAS File-based storage as well as
iSCSI-SAN with the iSCSI Target solution powered by StarWind®. This capability enables
the Administrator to create and manage multiple iSCSI targets to meet the specific needs of
their dynamic IT environments.
A total solution with industry-leading technology partners: We combined hardware
and software from industry leaders to deliver a reliable, secure and easy-to-manage storage
server designed specifically for small business environments. WD Sentinel RX4100 features:
Best-in-class hard drives – Equipped with hard drives that feature high capacity
storage, peak performance and best-in-class reliability.
Intel®Atom™ processor – Built with Intel Atom dual core processor inside, WD
Sentinel™ RX4100 can easily handle your small business’s day-to-day computing and
file storage demands.
Windows Storage Server 2008 R2 Essentials – Microsoft Windows Storage Server
2008 R2 Essentials operating system provides the intuitive, reliable and scalable storage
solution your small business needs to quickly and efficiently organize, protect and share
your critical business data using the familiar Windows user experience. With enterprise-
class, server-based, block-level de-dupe backup capability you can be confident that
your data is well protected.
*Pre-installed in US-only models

PRODUCT OVERVIEW
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Real-time system status through the administration dashboard: Receive critical
system updates via the built-in email alerts functionality. Or view real-time updates for the
system, RAID and network status through WD Sentinel’s dashboard, which includes easy-
to-use task wizards to help you set backup schedules, administer user accounts and
manage public and private shares.
Compatible with multiple operating systems: WD Sentinel RX4100 includes the
Connector software for Windows XP, Windows Vista®, Windows 7, Windows 8, Mac OS X
Mountain Lion, Mac OS X Lion, Mac OS Snow Leopard and Mac OS X Leopard. Support for
major network file-system protocols enables cross-platform compatibility and file sharing
among Windows, Mac®and Linux®/UNIX®operating systems. Supports Time Machine
backup for Mac OS clients. Compatibility may vary depending on user’s hardware
configuration and operating system.
Stream digital media anywhere in your network: With the built-in DLNA®server your
employees can access any shared media libraries on the network rather than maintaining
copies on their individual computers. You can also stream digital content like videos, music,
or digital signage for employees, vendors or clients using remote web access.
Optional off-site disaster recovery service*: Every small business should have a plan to
protect its data from an unforeseen disaster (fire, flood, earthquake, etc.). KeepVault is an
off-site cloud-based data backup and disaster recovery solution that’s integrated within
WD Sentinel’s administration dashboard. It’s easy to use and cost-effective and provides
built-in support for data encryption and compression for secure and faster data transfer.
WD Guardian Services: When you need a little help from an expert, we’ll take care of you!
WD Guardian Services offers flexible, affordable and hassle-free technical support and
extended warranty plans with a variety of benefits. Choose the plan that works best for your
business. Visit www.wdguardian.com for details.
Why WD?: Western Digital has been making hard drives for over 40 years. We know how to
build drives to store and protect your data because we understand that your company’s
data is paramount to your business success.
*Pre-installed in US-only models

PRODUCT OVERVIEW
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Package Contents
Small Business Storage Server
1 RJ-45 Ethernet cable
1.8 meter power cord
Basic Installation Guide
For information on additional accessories, visit:
US www.shopwd.com or www.wdstore.com
Europe • Austria: www.wdstore.de
• United Kingdom: www.wdstore.eu
• France: www.wdstore.fr
• Italy: www.wdstore.it
• Germany: www.wdstore.de
• Spain: www.wdstore.es
• Netherlands: www.wdstore.nl
• Rest of EU Countries: www.shopwd.eu or www.wdstore.eu
All others Contact WD Technical Support in your region. For a list of Technical
Support contacts, visit http://support.wd.com and see Knowledge
Base Answer ID 1048.
WD Sentinel RX4100
1.8 meter power cord Ethernet cable Basic Install Guide

PRODUCT OVERVIEW
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
System Requirements and Compatibility Information
Requirement Description
Client Operating System
Compatibility
Windows 8
• Basic (x86 and x64)
• Pro (x86 and x64)
• Enterprise (x86 and x64)
Windows 7
• Home Basic (x86 and x64)
• Home Premium (x86 and x64)
• Professional (x86 and x64)
• Ultimate (x86 and x64)
• Enterprise (x86 and x64)
• Starter (x86)
Windows Vista
• Home Basic with Service Pack 2 (SP2) (x86 x64)
• Home Premium with SP2 (x86 and x64)
• Business with SP2 (x86 and x64)
• Ultimate with SP2 (x86 and x64)
• Enterprise with SP2 (x86 and x64)
• Starter with SP2 (x86)
Windows XP
• Home with Service Pack 3 (SP3)
• Professional with SP3
• Media Center 2005 with SP3
Mac OS X
• Leopard
• Snow Leopard
• Lion
• Mountain Lion
File sharing support for Linux and UNIX
Local Network • Router/switch (Gigabit Ethernet recommended to maximize
performance)
• DHCP enabled
Broadband Access Required for remote access outside the LAN
Display and Peripherals • Super VGA (800 x 600) or higher-resolution monitor
• USB Keyboard
• USB Mouse or compatible pointing device

PRODUCT OVERVIEW
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Technical Specifications
Specification Description
Interfaces • High performance (10/100/1000) Gigabit Ethernet connection
• 2 ports of powered USB 3.0
• 1 port of powered USB 2.0
I/O ports • 2 Ethernet (RJ-45 Ports)
• 2 USB 3.0 Ports
• 1 USB 2.0 Port
• 1 VGA Port
Supported protocols CIFS/SMB, NFS, HTTP, HTTPS, WebDAV, AFP
Internal hard drives 4 WD 3.5-inch SATA Best in Class hard drives with
RAID-specific time-limited error recovery (TLER)
Pioneered by WD, this feature prevents drive fallout caused by the
extended hard drive error-recovery processes common to desktop
drives.
Approved Drive Models
For a complete list of approved drive models, search for Answer ID
9443 in the WD Knowledge Base at http://support.wd.com.
CPU Intel Atom Dual Core 1.80 Ghz
Memory 4 GBytes SODIMM DDR3-800
Drive bays • 4 3.5 inch hard drive bays
• Hot swap capable
• Trayed design
RAID level • RAID 5 with automatic rebuild functionality
Physical dimensions • Length: 26 inches (660 mm)
• Width: 19 inches (482.1 mm)
• Height: 1.75 inches (44 mm)
Weight • 8 TB and 12 TB: 26.627 lbs (12.078 kgs)
• 16 TB: 27.112 lbs (12.298 kgs)
Capacities • 8 TB (4 x 2 TB); 6 TB Usable
• 12 TB (4 x 3 TB); 9 TB Usable
• 16 TB (4 x 4 TB); 12 TB Usable
Power • 1 internal power supply
• 1 external power port for failover (optional)
Power supply • Input voltage: 100 to 240 V AC
• Input frequency: 50 to 60 Hz
• Output voltage: 19V DC, up to 6.32A
Temperature • Operating temperature: 0 to 35 °C (32 to 95 °F)
• Non-operating temperature: -40 to 70°C (-40 to 158 °F)
Switches • Power
• Recovery

PRODUCT OVERVIEW
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Product Views
Front View (With Bezel)
LEDs 1 Drive Activity LED
• Flashing blue indicates data transfer to/from any drive
• Black indicates no drive activity
1 Drive Warning LED
• Solid RED indicates fault on any drive.
• Black indicates no drive warnings
1 Drive Status LED
• Flashing blue indicates data transfer to/from any drive
• Solid RED indicates a drive fault
• Black indicates no drive activity
1 Power LED
• Flashing blue indicates boot status
• Flashings RED indicates a fault condition
• Solid blue once booted, and there are no pending fault
conditions, indicates a good operational state
• Black indicates inactive state
2 Ethernet Port LEDs
• Flashing green indicates activity
• Solid amber indicates that there is a link connection
• Black indicates inactive state
4 Drive Tray LEDs
• Flashing blue or solid blue indicates drive activity
• Solid RED indicates drive fault (Drive must be replaced)
Operating System Windows Storage Server 2008 R2 Essentials
Backups 25-client computer support for backup (Windows and Mac OS
Client computers)
Restore • Bare metal restore for Windows clients
• File/folder level restore
Specification Description
Bezel Lock Bezel LockBezel

PRODUCT OVERVIEW
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Front View (Without Bezel)
Back View
Indicators
Component Icon Description
Ethernet ports Connect the device to a local network.
Power port Connects the device to an AC power cord and the power outlet.
Recovery button RECOVERY Button on the back of the server recovers the server (including the operating
system) while using a USB drive in an event of an OS corruption.
USB ports Connects with USB 2.0 and 3.0 devices such as a USB storage, USB mouse,
USB keyboard, or a UPS.
VGA port Connects to your VGA monitor
DC In connector Connects the device to a DC power cord and the power outlet.
USB 2.0 port
Power Button
Status LEDs
Drive Trays
Internal Power
Supply port VGA port
USB 3.0 ports
1&2
Gigabit Ethernet
ports 1 & 2
Recovery button
External DC In
Power port

PRODUCT OVERVIEW
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
LEDs
The LEDs on the WD Sentinel identify the status of the unit.
LED Color State Description
Power LED Black Off WD Sentinel server is currently inactive.
Blue Flashing WD Sentinel server is currently booting the software.
Blue Solid WD Sentinel server has successfully booted the
software and is operational.
Red Flashing Indicates that a serious fault has occurred and
needs immediate attention.
Drive
Activity
Black Off Indicates no drive activity.
Blue Flashing Indicates that data is transferring to/from the drives.
Drive
Warning
Black Off Indicates no drive warning activity.
Red Solid Indicates that a serious fault has occurred on the
drives.
Drive Status Black Off Indicates no drive status activity.
Blue Flashing Indicates data transfer to/from drives.
Red Solid Indicates a drive fault.
Drive LEDs Black Off If the LED is off while other drive LEDs are on, no
drive is installed in the bay.
Blue Flashing Drive is currently active. Note that all lights in a RAID
system are active at the same time by design.
Red Solid Indicates drive failure. Replace this drive as soon as
possible. The system is no longer RAID protected
until the drive is replaced and the RAID structure is
repaired.
Ethernet
Port
Black Off Indicates an inactive state.
Green Flashing Indicates link activity.
Amber Solid Indicates that there is a link connection

PRODUCT OVERVIEW
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Where to Find Help
This manual provides step-by-step instructions and other important information regarding
your WD product. It is meant for the person serving as the administrator of the
WD Sentinel RX4100. You can download translated versions and updates to this manual
from http://products.wd.com/updates. For more information and news about this product,
visit our website at http://www.wd.com/.
Additional Reference Description
Basic Installation Guide Included in the product box or available at
http://products.wd.com/WDSentinel-RX4100 helps you install the
WD Sentinel server.
WD Online Help Specific descriptions and instructions accessed on
WD-specific (Monitor) pages on the Dashboard.
Microsoft Online Help • Access detailed explanations and instructions for a particular
page by clicking the Help button at the top right of the
Dashboard.
• Search for help on a specific topic or term by entering it in the
Microsoft Online Help search field at the top right of the page.
• Access the entire Microsoft Online Help system by clicking
Microsoft Online Help.
Important: Not all Microsoft Online Help is applicable to the WD Sentinel RX4100.
The WD Online Help and this Administrator's Guide take precedence over the
Microsoft Online Help.

3
CONNECTING THE SERVER AND GETTING STARTED
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WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Connecting the Server and Getting Started
User Roles and Responsibilities
How the WD Sentinel RX4100 Fits into Your Office
Connecting the WD Sentinel RX4100 Server to Your Network (Preferred Method)
Connecting the WD Sentinel RX4100 Server from a Client Computer (Optional Method)
Setting up your WD Sentinel Server (one time only)
Connecting your Computers
Rebooting the WD Sentinel Server
This chapter steps you though the process of connecting and setting up your WD Sentinel
RX4100 server and connecting it to computers in your network.
User Roles and Responsibilities
Types of WD Sentinel RX4100 Users
At a high level there are two categories of users who need to access one or more features of
your WD Sentinel server.
Administrator—This is the person who performs the setup and routine management
tasks on the WD Sentinel server. This person is also the holder of the Administrator
password of your WD Sentinel server.
Users—You can have up to 25 user accounts on your WD Sentinel server. These can
be:
-Internal Users – The internal users are typically the employees (including the Admin-
istrator) in your office, working locally or occasionally from a remote location (e.g.
Sales Staff), who need to access business data and server resources.
-External Users – The external users are the customers and business
partners with whom you need to exchange business data.
The WD Sentinel server offers different paradigms for each type of user. The table below
provides a view into the usage model and tasks for each category of users.
Administrator
(e.g., Business Owner)
Internal Users
(e.g., Employees)
External Users
(e.g., Clients or Business
Partners)
Primary Setup Tasks
• Physically connects the
WD Sentinel server to the
network.
• Configures the
WD Sentinel server itself. This
is a one-time procedure.
• Connects a Mac or Windows
PC to the WD Sentinel server
by installing Connector
software on it.
Primary Setup Tasks
• None
Primary Setup Tasks
• None

CONNECTING THE SERVER AND GETTING STARTED
14
WD SENTINEL RX4100
ADMINISTRATOR AND MAINTENANCE GUIDE
Primary User Interface
• Dashboard - Signs in using the
Administrator password (no
username required).
Primary Interface
• Launchpad - Signs in using the
assigned user name and
password.
Secondary Interface
• Remote Web Access -
While accessing remotely,
signs in using the assigned
user name and password.
Primary Interface
• Remote Web Access - Signs in
using the assigned user name
and password.
Dashboard Task Examples
• Sets up user accounts and
assigns permissions.
• Manages shared folders.
• Sets up and manages
automatic backup schedule.
• Manages WD Sentinel server
settings, resolves any alerts,
and monitors server
performance.
• Sets up Remote Web Access.
• Manages updates.
• Creates and manages iSCSI
targets.
Launchpad Task Examples
• Accesses data on shared
storage.
• Starts manual backups.
• Launches Remote Web
Access.
Remote Web Access Task
Examples
• Accesses data on shared
storage.
• Connects to the PCs in the
office remotely.
• Accesses media library.
Remote Web Access Task
Examples
• Accesses data on shared
storage.
• Accesses media library.
Note: For each user account, the WD Sentinel server enables the Administrator to set granular permissions
for various shared folders as well as server resources, such as Remote Web Access. At all times, the
users are only able to access the data on the server and other server resources for which they have
permissions.
Administrator
(e.g., Business Owner)
Internal Users
(e.g., Employees)
External Users
(e.g., Clients or Business
Partners)