Western Digital WDBLGT0040KBK Service manual

WD Sentinel DX4000
Small Office Storage Server
Administrator’s 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.wdc.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.wdc.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.wdc.com.
Accessing Online Support
Visit our product support website at http://support.wdc.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 - Search by keyword, phrase, or answer ID.
•Installation - Get online installation help for your WD product or software.
•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.wdc.com
North America Europe (toll free)* 00800 ASK4 WDEU
English 855.556.5117 (00800 27549338)
Spanish 855.556.5117 Europe [phone]
Middle East [phone]
Mexico 001 8002754932 Africa [phone]
South America Asia Pacific
Chile 1230 020 5871 Australia 1 800 42 9861
Venezuela 0800 100 2855 China 800 820 6682/[phone]
Peru 0800-54003 Hong Kong [phone]
Uruguay 000 413 598 3787 India 1 800 200 5789
Argentina 0800 4440839 Indonesia [phone]
Brazil 0800 7704932 Japan 0120 994 120/00531 65 0442
Korea 02 703 6550
Malaysia [phone]/1 800 88 1908/
[phone]
Philippines 1 800 1441 0159
Singapore [phone]/[phone]/
[phone]
Taiwan [phone]/[phone]
* Toll free number available in the following countries: Austria, Belgium, Denmark, France, Germany, Ireland, Italy,
Netherlands, Norway, Spain, Sweden, Switzerland, United Kingdom.

TA B L E O F C O N T E N T S – i
WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
Table of Contents
WD® Service and Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
1 Important User Information . . . . . . . . . . . . . . . . . . . . 1
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Handling Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Recording Your WD Product Information . . . . . . . . . . . . . . . . . . . . . 2
About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Getting to Know Your WD Sentinel DX4000 Server . . . . . . . . . . . . .4
Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
System Requirements and Compatibility Information . . . . . . . . . . . . 8
Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Product Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Where to Find Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3 User Roles and Responsibilities . . . . . . . . . . . . . . . 15
Types of WD Sentinel DX4000 Users . . . . . . . . . . . . . . . . . . . . . . . 15
How the WD Sentinel DX4000 Fits into Your Office . . . . . . . . . . . . 17
4 Managing the WD Sentinel Server (Dashboard) . . 18
Setting up WD Sentinel Server & Connecting Computers. . . . . . . . 18
Accessing the Dashboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Performing Dashboard Tasks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Using the Home Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Managing User Accounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Managing Server Folders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Monitoring System Health and Alerts . . . . . . . . . . . . . . . . . . . . . . 22
Updating Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Managing Server Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Shutting Down the Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

TABLE OF CONTENTS – ii
WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
5 Managing Storage on the WD Sentinel Server . . . . 31
WD Sentinel Server RAID Storage . . . . . . . . . . . . . . . . . . . . . . . . . 31
Using USB Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Replacing a Failed Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Adding Capacity by Adding a Drive . . . . . . . . . . . . . . . . . . . . . . . . 35
6 Using the WD Sentinel Server’s Features. . . . . . . . 36
Using the Launchpad (Internal Users) . . . . . . . . . . . . . . . . . . . . . . . 36
Accessing Shared Folders Over Your Network. . . . . . . . . . . . . . . . 41
Accessing Computers and Shared Folders Remotely. . . . . . . . . . . 41
Backing up (Windows PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Recovering/Restoring (Windows PC) . . . . . . . . . . . . . . . . . . . . . . . 46
Recovering the WD Sentinel Server . . . . . . . . . . . . . . . . . . . . . . . . 48
7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Specific Problems and Corrective Actions . . . . . . . . . . . . . . . . . . . 57
8 Best Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Setting up the WD Sentinel DX4000. . . . . . . . . . . . . . . . . . . . . . . . 59
Setting up Client Computers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Using the WD Sentinel DX4000 Efficiently . . . . . . . . . . . . . . . . . . . 60
Replacing Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Sharing Files with External Users . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Shutting Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9 Regulatory and Warranty Information. . . . . . . . . . . 62
Regulatory Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
GNU General Public License (“GPL”) . . . . . . . . . . . . . . . . . . . . . . . 64
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

1
IMPORTANT USER INFORMATION
1
WD SENTINEL DX4000
ADMINISTRATOR’S 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

IMPORTANT USER INFORMATION
2
WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
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.
- If the product exhibits a distinct change in performance, contact WD Customer
Support at http://support.wdc.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
In the following table, write the serial number and model number of your new
WD product found on the label on the bottom of the device. Also, write the purchase
date and other notes such as your operating system and version. This information is
necessary for technical support.
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.
Serial Number:
Model Number:
Purchase Date:
System and Software Notes:

IMPORTANT USER INFORMATION
3
WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
About This Guide
This Administrator's 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:
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
4
WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
Product Overview
Getting to Know Your WD Sentinel DX4000 Server
Package Contents
System Requirements and Compatibility Information
Technical Specifications
Product Views
Indicators
Where to Find Help
Getting to Know Your WD Sentinel DX4000 Server
Congratulations on your purchase of the WD Sentinel DX4000 Small Office Storage
Server.
Designed specifically for small business environments, WD Sentinel DX4000 is an
easy-to-set-up Small Office Storage Server that provides secure centralized storage,
complete data protection, and data access for your employees, clients, and vendors
while in the office or working remotely from anywhere with an Internet connection.
Featuring hardware and software from industry leaders, WD Sentinel DX4000
delivers a high performance, reliable, cost effective, and easy-to-manage storage
server for your office network.
Offering complete data protection for your business, WD Sentinel DX4000 includes
WD enterprise-class RAID edition hard drives, support for RAID levels 1 and 5,
backup and restore software for up to 25 computers, integrated block level data
de-duplication for computer backups, dual Gigabit Ethernet ports, and an optional
second power supply for high reliability and availability.
Note: RAID stands for Redundant Array of Independent Disks. RAID is a storage
technology that provides increased reliability and data protection through
redundancy.
The WD Sentinel server offers a full range of powerful features to put you in control to
manage and protect your business data. It not only provides a central repository for
all of your company information, but also as a backup server for up to 25 computers
in your office network, without ever needing to purchase additional backup software
licenses.
With its built-in secure Remote Web Access, your employees, local or working
remotely, can collaborate with each other and securely access files and customer
information, thereby improving productivity and efficiency.
Featuring four hot-swappable tray-less drive bays, WD Sentinel DX4000 provides a
wide range of storage capacities, from 4 TB (2 TB usable in RAID 1 configuration) up
to 12 TB (9 TB usable in RAID 5 configuration).

PRODUCT OVERVIEW
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WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
Key Features
Complete Solution from 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 office environments.
WD Sentinel DX4000 features:
WD enterprise-class hard drives—Equipped with up to four WD Enterprise-
Class RAID Edition drives (2 TB and 3 TB) that feature high capacity storage,
peak performance, and enterprise-class reliability.
Intel®Atom®processor—Built with an Intel Atom dual core processor inside,
WD Sentinel DX4000 can easily handle your small business’ day-to-day
storage demands.
Windows®Storage Server 2008 R2 Essentials—Powered by Microsoft’s
Windows Storage Server 2008 R2 Essentials operating system,
WD Sentinel DX4000 is a simple-to-use storage server solution for small
businesses with easy manageability and powerful storage features on a
proven and reliable server platform offering the familiar Windows user
experience.
Simple Server Setup: Whether you’re an IT expert or not, the simple wizard-based
setup process allows you to integrate WD Sentinel server into your office network
like a pro. Each WD Sentinel comes pre-installed with the operating system; hard
drives pre-configured with RAID protection (units with two pre-installed drives in
RAID 1 and units with four pre-installed drives in RAID 5) so the unit is ready to be
set up right out of the box.
Connector Software: The included Connector software is all you need to
seamlessly connect the computers on your network to your WD Sentinel server.
Once connected, the computer is configured to automatically back up to the server
daily and allows the user to access the server resources.
Centralized Storage & File Management: WD Sentinel puts you in control of your
business data. The secured centralized storage enables quick file search and
retrieval for everyone in your business. Specific user permissions for shared folders
allow you to prevent unwanted access to sensitive business documents, such as
payroll or contracts.
Automated Server Driven Backup: WD Sentinel DX4000 server automatically
backs up and saves a complete image of up to 25 computers connected to the
server. With all-inclusive data protection, you will never have to purchase other
backup software licenses. The users also have an option to initiate an on-demand
backup of their computer using their Launchpad interface.
Secure Remote Access: Easily connect to your WD Sentinel server from virtually
anywhere with a personalized Internet address. The built-in remote access enables
you to get to your business data from any browser based device as well as share
files and collaborate with customers and business partners. Additionally, you can
remotely manage the server, and your employees can securely access their PCs
from anywhere.

PRODUCT OVERVIEW
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WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
Feature Rich Management Dashboard: The administration Dashboard interface
quickly guides you through the common wizard-based management tasks such as
managing users, assigning folder permissions, and setting up a backup schedule. It
also enables you to monitor the status and health of computers on the network from
a single view and helps you ensure that the computers are being successfully
backed up on a regular basis.
File-Folder or Bare Metal Restore: Restoring data from the server is just as easy.
Simply recover individual files and folders or restore an entire computer from image-
based backups stored on your WD Sentinel Server.
Block Level De-duplication: WD Sentinel server features elegant block level
de-duplication technology for the computer backup data. A function completely
transparent to the users, it enables faster subsequent backups as well as efficient
utilization of storage on your server.
Active Directory Join: Active Directory join capability enables WD Sentinel DX4000
to easily integrate into your existing infrastructure and networks.
DLNA Media Server: With the built-in DLNA media server your employees can
access WD Sentinel server’s shared media library on the network rather than
maintain copies of media files 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.
LCD Display Panel: The LCD display panel on the front of the device allows you to
monitor the system status and critical alerts.
Cross Platform File Sharing: WD Sentinel DX4000 supports industry standard
protocols such as CIFS/SMB and NFS, enabling file sharing across various Windows
and non-Windows clients.
Leading Edge Performance: With dual Gigabit Ethernet connectivity,
WD Sentinel DX4000 delivers read speeds greater than 85 MBps through the
Gigabit Ethernet interface. That is up to three times faster than most network drives
in this category today. For maximum flexibility there are also 2 SuperSpeed USB 3.0
ports to allow you to connect additional storage devices and experience up to
5 Gb/s transfer rates.
Automatic RAID Migration and Capacity Expansion: Adding storage capacity
to your WD Sentinel server is as easy as changing a light bulb. Just open the door
and add the hard drive in one of the empty storage bays. WD Sentinel server does
the rest. It seamlessly migrates to the appropriate RAID level and automatically
expands the server’s storage capacity. Your users can still access your business
data while the new drive is being integrated. No data loss. No downtime.

PRODUCT OVERVIEW
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WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
Designed for High Availability and Reliability:
Each WD Sentinel is pre-configured with WD’s reliable and durable
enterprise-class RAID edition drives.
RAID levels 1 or 5 provide another layer of data protection.
Automatic server-driven backup and restore ensures your data on the
computer or your network is always protected.
Dual Gigabit Ethernet ports offer redundancy and high availability.
Optional dual power supply ensures increased uptime.
Package Contents
Small Office Storage Server
1 RJ-45 Ethernet cable
AC adapter with power cord
Quick Install Guide
For information on additional accessories, for example, a drive, additional power
adapter, or Ethernet cable visit:
US www.shopwd.com or www.wdstore.com
Canada www.shopwd.ca or www.wdstore.ca
Europe 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.wdc.com and see
Knowledge Base Answer ID 1048.
WD Sentinel DX4000
AC adapter Ethernet cable Quick Install Guide

PRODUCT OVERVIEW
8
WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
System Requirements and Compatibility Information
Requirement Description
Client Operating System
Compatibility
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
®
•SnowLeopard
®
Local Network • Router/switch (Gigabit Ethernet recommended to maximize
performance)
• DHCP enabled
Broadband Access Required for remote access outside the LAN

PRODUCT OVERVIEW
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WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
Technical Specifications
Specification Description
Interfaces High performance (10/100/1000) Gigabit Ethernet connection
2 ports of powered USB 3.0
I/O ports 2 Ethernet (RJ-45 Ports)
2 USB 3.0 Ports
Supported protocols CIFS/SMB, NFS, HTTP, HTTPS, WebDAV
Internal hard drives 2-4 WD 3.5-inch SATA RAID Edition 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.
24x7 reliability
With 1.2 million hours MTBF (tested at 100% duty cycle), these
drives have the highest available reliability rating on a high-
capacity drive.
Improved rotary vibration tolerance
Optimized drive mechanics, system characterization, and process
validation yield unmatched performance in high vibration
environments.
Approved Drive Models
• WD2002FYPS Capacity: 2 TB Cache: 64 MB
RPM: Intellipower
• WD3009FYPX Capacity: 3 TB Cache: 64 MB
RPM: Intellipower
Note: The most up-to-date list of approved drives is available at
www.WDStore.com
CPU Intel Atom Dual Core 1.80 Ghz
Memory 2 GBytes SODIMM DDR3-800
Drive bays 4 3.5 inch hard drive bays
Hot swap capable
Trayless design
RAID level RAID 1 (2 drives only) and RAID 5 (3-4 drives)
Automatic migration and capacity expansion
Physical dimensions Length: 6.3 inch (160 mm)
Width: 8.8 inch (224 mm)
Height: 8.1 inch (206 mm))
Weight 4 TB and 6 TB: 10.76 lb (4.88 kg)
8 TB and 12 TB: 14.0 lb (6.35 kg)
Capacities 4 TB, 6 TB, 8 TB, 12 TB
Power 2 external power supplies
Redundant failover
Power supply Input voltage: 100V to 240V AC
Input frequency: 50 to 60 Hz
Output voltage: 19V DC, up to 6.32A

PRODUCT OVERVIEW
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WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
Product Views
Front View
Temperature Operating temperature: 5 to 35 °C (41 to 95 °F)
Non-operating temperature: -20 to 65°C (-4 to 149 °F)
Switches Power
Buttons for scrolling through messages on LCD
LEDs 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
4 Drive Bay LEDs
• Flashing blue or solid blue indicates drive activity
• Solid RED indicates drive fault. (Drive must be replaced)
LCD panel 2 lines of 16 characters for status and alerts
Operating System Windows Storage Server 2008 R2 Essentials
Backups 25-client computer support for backup (server based)
Recovery Bare metal restore
File/folder level restore
Specification Description
Scroll buttonsPower button
Power/Status LED
Drive status LEDs
Door covering drives

PRODUCT OVERVIEW
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WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
Back View
Component Icon Description
Ethernet ports Connect the device to a local network.
Power ports Connects the device to an AC adapter and the power outlet.
Reset /Recovery
button
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 or 3.0 devices such as a USB storage or a
UPS.
LEDs
Power ports
1 & 2
Ethernet ports
1 & 2
USB ports
1 & 2
Kensington Security Lock
Reset/Recovery button
Fan

PRODUCT OVERVIEW
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WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
Indicators
LCD
The Liquid Crystal Display (LCD) on the front of the WD Sentinel server is a portal
into its status. Normally, the LCD displays the name of the WD Sentinel server that
the administrator assigned during initial setup along with its IP address. You can use
either of these to discover and communicate with the server. (See the Quick Install
Guide for Administrators.)
Use the scroll buttons to the right of the LCD to display:
Number of drives that are installed
Available capacity
Status
If an alert occurs, or the WD Sentinel server is performing certain operations, the
status displays in the LCD:
Alert Description
Backup Failed The server failed to back up a computer. Go to the Dashboard
and examine the alerts to discover which computer backup failed.
Capacity Low Available storage capacity of the WD Sentinel server is low.
Drive Overtemp The temperature of one of the drives is too high.
Ethernet 1 Disconnected WD Sentinel server has detected that Ethernet 1 has lost
connection.
Ethernet 2 Disconnected WD Sentinel server has detected that Ethernet 2 has lost
connection.
Fan Failed WD Sentinel server has detected that the fan is no longer
operational.
Imminent Drive Failure One of the drives is demonstrating imminent failure (discovered
through Self-Monitoring Analysis and Reporting Technology
S.M.A.R.T). Replace the drive as soon as possible.
Initializing The RAID system is initializing the storage; this is similar to
Verifying.
Invalid Drive A drive that is not approved for use in the WD Sentinel server has
been inserted.
Invalid Drive Capacity A drive with incompatible size was inserted and migration/rebuild
could not proceed.
Migrating … % RAID system is migrating to a larger capacity due to the addition
of a drive.
Network Disconnected The server is not connected to the network.
Power Supply 1 Failed Power supply 1 has failed or been disconnected.
Power Supply 2 Failed Power supply 2 has failed or been disconnected.
Reboot WD Sentinel server will reboot.
Repairing … % RAID system is being repaired to full RAID protection.
Shutting Down WD Sentinel server is shutting down.

PRODUCT OVERVIEW
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WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
LEDs
The LEDs on the Sentinel work in conjunction with the LCD display to further identify
the status of the unit.
Software Update Available A WD Sentinel server update is available. Using the Dashboard,
apply the update.
Storage Degraded RAID protection is no longer in place, and a drive needs to be
replaced.
Temperature High WD Sentinel server has exceed acceptable temperature and will
shut down.
Verifying … % RAID system was shut down inadvertently. It is validating and
correcting the integrity of the RAID array.
LED Color State Description
Power LED 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. The LCD displays
the fault condition.
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. The LCD also displays
"Storage Degraded." 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
Left LED (on
back of
server)
Green/Amber Solid The left LED indicates the connection speed of
the network connection:
• Green indicates a 1000 Mb connection
• Amber indicates a 100 Mb connection
Ethernet Port
Right LED (on
back of
server)
Green Blinking Indicates link activity.
Alert Description

PRODUCT OVERVIEW
14
WD SENTINEL DX4000
ADMINISTRATOR’S 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 DX4000. You can download translated versions and updates to this
manual from http://products.wdc.com/updates. For more information and news
about this product, visit our website at http://www.wdc.com/.
Additional Reference Description
Quick Install Guide for
Administrators
Included in the product box or available at
http://products.wdc.com/WDSentinel; helps you install the
WD Sentinel server and gets you started using it.
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 DX4000. The WD Online Help and this Administrator's Guide
take precedence over the Microsoft Online Help.

3
USER ROLES AND RESPONSIBILITIES
15
WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
User Roles and Responsibilities
Types of WD Sentinel DX4000 Users
How the WD Sentinel DX4000 Fits into Your Office
This chapter reviews how the WD Sentinel server fits into your office and delineates
the tasks for which the Administrator and Users have responsibilities.
Types of WD Sentinel DX4000 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
Administrator) 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.

USER ROLES AND RESPONSIBILITIES
16
WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
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 Windows PC
to the WD Sentinel server
by installing Connector
software on it.
Primary Setup Tasks
•None
Primary Setup Tasks
•None
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.
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.