Onnto USB 2.0 2-Bay RAID System User manual

2-bay
R
AI
D
Systems
for 3.5 ” SATA HDD
Easy RAID Storage Management for High Productivity
USB2.0
eSATA/USB2.0
USB2.0/FireWire800
User’s Manual
Rev. 06
This User’s Manual provides instructions
on assembly and usage of the 3 models
Rev. 07

2
Table of Contents
GENERAL INFORMATION 4
COPYRIGHT 4
NOTICES AND CLASSIFICATIONS 4
CONTACT US 4
INTRODUCTION 5
FEATURES 5
PRECAUTIONS FOR THE RAID SYSTEM 6
USB 2.0 2-BAY RAID SYSTEM 7
SYSTEM REQUIREMENTS 7
PACKAGE CONTENTS 7
USB 2.0 2-BAY RAID SYSTEM VIEWS 8
FRONT VIEW 6
REAR VIEW 6
INSTALLING/REPLACING THE HARD DRIVES IN THE RAID SYSTEM 9
SETTING THE RAID MODE 13
CONNECTING THE RAID SYSTEM TO A COMPUTER 15
SAFE REMOVAL OF THE RAID SYSTEM 17
LED INDICATORS 17
SYSTEM LED x 1 17
HDD LED x 2 17
REBUILD 18
ONLINE REBUILD 18
REBUILD EXISTING DATA TO A BACKUP HDD 18
HOT SWAP 19
EXTERNAL BOOTUP 19
eSATA/USB 2.0 2-BAY RAID SYSTEM 20
SYSTEM REQUIREMENTS 20
PACKAGE CONTENTS 20
eSATA/USB 2.0 2-BAY RAID SYSTEM VIEWS 21
FRONT VIEW 19
REAR VIEW 19
INSTALLING/REPLACING THE HARD DRIVES IN THE RAID SYSTEM 22
SETTING THE RAID MODE 26
CONNECTING THE RAID SYSTEM TO A COMPUTER 27
SAFE REMOVAL OF THE RAID SYSTEM 29
LED INDICATORS 29
SYSTEM LED x 1 29
HDD LED x 2 29
REBUILD 30
ONLINE REBUILD 30
REBUILD EXISTING DATA TO A BACKUP HDD 30
HOT SWAP 31
EXTERNAL BOOTUP 31
eSATA PCI EXPRESS CARD INSTALLATION 32
SYSTEM REQUIREMENTS 32

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HARDWARE INSTALLATION 32
DRIVER INSTALLATION 33
VERIFY DRIVER INSTALLATION 33
USB 2.0/FIREWIRE 800 2-BAY RAID SYSTEM 35
SYSTEM REQUIREMENTS 35
PACKAGE CONTENTS 35
USB 2.0/FIREWIRE 800 2-BAY RAID SYSTEM VIEWS 36
FRONT VIEW 34
REAR VIEW 34
INSTALLING/REPLACING THE HARD DRIVES IN THE RAID SYSTEM 37
SETTING THE RAID MODE 41
CONNECTING THE RAID SYSTEM TO A COMPUTER 43
SAFE REMOVAL OF THE RAID SYSTEM 45
LED INDICATORS 45
SYSTEM LED x 1 45
HDD LED x 2 45
REBUILD 46
ONLINE REBUILD 46
OFFLINE REBUILD 46
REBUILD EXISTING DATA TO A BACKUP HDD 46
HOT SWAP 47
EXTERNAL BOOTUP 47
RAID SYSTEM and MODES 48
JBOD 48
SPANNING 48
STRIPING 49
MIRRORING 50
APPENDIX: SPECIFICATIONS 51

4
GENERAL INFORMATION
COPYRIGHT
Copyright @ 2008 ONNTO Corporation. All rights reserved. No part of this
publication may be reproduced, stored in a retrieval system, or transmitted in any
form or by any means, electronic, mechanical, photocopying, recording or
otherwise, without the prior written consent of ONNTO Corporation.
The product information provided in this manual is subject to change without prior
notice and does not represent a commitment on behalf of the vendor. The vendor
assumes no liability or responsibility for any errors that may appear in this manual.
NOTICES AND CLASSIFICATIONS
FCC-B Radio Frequency Interference Statement
This device complies with Part 15 of the FCC rules. Operation is subject to the
following two conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that
may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates uses and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications.
CONTACT US
We are committed to offer economical, high-quality connectivity and storage
enclosure solutions to the market. Your questions, inquiries or comments are
welcomed.
For Technical Support, please go to our website at www.onnto.com.tw
ONNTO Corporation
3F, No. 60, Lane 321, Yang Guang St.,
Nei Hu, Taipei 114 Taiwan
Tel: [phone]
Fax: [phone]
Email: [email protected]

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INTRODUCTION
Thank you for purchasing the 3.5” SATA HDD 2-bay RAID System. The 2-bay
RAID System provides massive storage capacity and advanced RAID
configuration options in a desktop storage device. The Mode switches allow
easy configuration of Striping (RAID 0), Spanning, Mirroring (RAID 1) and JBOD
RAID Modes.
FEATURES
Provides Striping, Spanning, Mirroring, and JBOD RAID Modes for effective
storage management
Supports easy RAID Mode configuration with convenient Mode switches
Offers easy monitoring of system status via LED indicators
Dissipates heat efficiently with aluminum housing
Maximizes airflow and product life with a silent, durable fan
Increases data transfer speed with the Serial ATA technology
Supports hot-plug and HDD hot-swap
Enables flexible eSATA, USB 2.0 or 1394b connectivity
Any loss, corruption, or destruction of data is the sole responsibility of the
user of the RAID System. Under no circumstances will the manufacturer be held
liable for the recovery or restoration of any data.
This User’s Manual provides instructions on assembly and usage of the following
products:
USB 2.0 2-bay RAID System
eSATA/USB 2.0 2-bay RAID System
USB 2.0/FireWire 800 2-bay RAID System
Please thoroughly read and follow the instructions provided in this manual.
Failure to do so may result in damage to the RAID System, and any or all of the
connected devices.

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PRECAUTIONS FOR THE RAID SYSTEM
♦The main circuit board of the RAID System is susceptible to static
electricity. Proper grounding is required to prevent electrical damage to
the RAID System or other connected devices, including the computer host.
Always place the RAID System on a smooth surface and avoid all
dramatic movement, vibration and percussion.
♦Do NOT allow water to enter the RAID System.
♦Installation of additional equipment in the host computer may be required.
Visit our website to download the latest product information updates.
♦Do NOT attempt to service this unit yourself. Opening or removing the
back cover will expose you to dangerous voltages or other hazards.
♦Do NOT block the front and rear ventilation. Proper airflow is required to
ensure reliable operation and to prevent overheating.
♦Do unplug the RAID System from the electrical outlet when not in use to
provide an ecological friendly environment.
♦Use only the power supply cable provided with the RAID System.

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USB 2.0 2-BAY RAID SYSTEM
SYSTEM REQUIREMENTS
PC
266MHz or faster CPU (Microsoft Vista requires a minimum 800MHz CPU)
64MB of RAM (Microsoft Vista requires a minimum 512MB of RAM)
Microsoft Windows 2000, XP, 2003, or Vista
One available USB 2.0 port
MAC
PowerPC or Intel Core Duo processor
64MB of RAM (Mac OS X 10.4 requires 256MB of RAM)
Mac OS 10.2 or higher (PowerPC) or Mac OS X 10.4 (Intel)
One available USB 2.0 port
SATA compatible hard drive is required for the RAID System. Once the
HDDs are formatted, the actual available storage capacity can vary depending on
selected operating environment (normally 5-10 % less).
PACKAGE CONTENTS
2-bay RAID System
USB Type A to mini-B Cable
AC Adapter
Fastening Screws x 8
Quick Start Guide
USB Cable Fastening ScrewAC AdapterRAID System Quick Start Guide
Please keep all package contents and packaging material in the event that
the product must be returned.

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1
2
3
4
6
5
7
8
9
10
11
USB 2.0 2-BAY RAID SYSTEM VIEWS
FRONT VIEW
1. System LED
Indicator
2. HDD LED Indicator
3. HDD Trays
REAR VIEW
4. Quick HDD release
levers
5. USB mini-B port
6. Reset Button
7. Mode Switch
8. Power Switch
9. DC IN
10. Fan
11. Lock Port

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INSTALLING/REPLACING THE HARD DRIVES IN THE RAID
SYSTEM
When the HDD is not installed, simply slide the tray out of the drive bay without
using the lever and be cautious when lifting the RAID System with the trays
inside. When the HDD is installed, after lifting the level, the tray should easily be
released from the drive bay.
1. Lift the quick HDD release lever to release the selected HDD tray from the
desired drive bay.
2. Slide the HDD tray out of the drive bay.

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Due to the design tolerance of the SATA HDD connector, however, the
HDD tray may not always be released from the drive bay easily, or may not be
released at all. If this occurs, carefully slide the HDD tray out of the drive bay
after lifting the quick HDD release lever.
3. When removed, the HDD tray appears as shown below.
4. Carefully slide the HDD into the drive tray.

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5. Ensure that the interface connectors are oriented toward the rear of the
drive tray.
Data & power connectors
are on this side.
6. Locate the screws included in the package. Ensure that the screw guides on
the side of the HDD are aligned with the openings on the side of the drive
tray. Fasten the HDD to the drive tray by inserting and tightening the
screws.

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7. Align the drive tray with the guide rails and slide it into the drive bay. Ensure
that the tray is completely inserted and that the interface connectors are
properly seated.
In most cases, you would need to firmly push the trays to a close until a
“click” sound is heard.
8. Now, the RAID System is ready for connection to a host

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SETTING THE RAID MODE
Deleting the current partition prior to changing RAID modes is highly
recommended.
For the USB 2.0 model, after deleting the current partition and turning “off” the
power switch, set the new RAID mode and power the RAID system “on” again.
The RAID system can then be used with the updated RAID mode.
Pressing the reset button is not required.
1. Power “off” the RAID System.
2. Use a small, flat-blade screwdriver to select the RAID Mode.
1
2

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3. After setting the new RAID mode, power the RAID System “on”.
3
USB 2.0 RAID Modes:
Changing the RAID Mode deletes all data stored on the device. If you have
saved data in the drives, backup all data before changing the RAID Mode.

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CONNECTING THE RAID SYSTEM TO A COMPUTER
Complete the following steps to connect the RAID System to a host computer.
1. Connect the AC/DC power adapter.
2. Insert both ends of the USB 2.0 cable into the corresponding port of the
RAID System and the host.

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2. Turn the power switch to the “on” position.
3. When connected, the System LED lights will become steadily orange.
You are now ready to begin using your RAID System!

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SAFE REMOVAL OF THE RAID SYSTEM
Safe removal of the RAID System from the host controller requires the steps.
First, you would need to eject the device from your host controller. Next, press
the “off” button on the RAID System if necessary.
Most current USB host controllers handle USB devices as external devices,
thus, it is highly recommended that the RAID System be safely removed from the
host.
LED INDICATORS
SYSTE
M
HDD 1 HDD 2
Color 1
Color 2 Color 1
Color 2
SYSTEM LED x 1
Indicators Color
Power on Orange
Power off None
HDD LED x 2
Indicators RAID Mode Color 1 Color 2
Disk error Stripe, Span, Mirror, JBOD Red None
Data access Stripe, Span, Mirror, JBOD None Flash Blue
Source HDD Mirror None Blink BlueDisk
rebuild Target HDD Mirror Red Blink Blue
The difference between a flashing LED and a blinking LED is that flashing
refers to the read/write activity, and blinking refers to slow but regular pulses.

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REBUILD
In Mirror mode, if one of the HDDs fails and is replaced with a functional HDD,
the RAID System will automatically rebuild the target HDD (the new functional
HDD) with data from the source HDD (the remaining functional HDD) sector by
sector. After the rebuild is completed, data in both HDDs will be identical. The
use of two identical HDDs from the same manufacturer, having the same
capacity and RPM is highly recommended.
When the chipset is processing the Rebuild task, if data is accessed during
this period, the speed of data access is around 2 ~ 3 MB/sec; thus, access of the
HDD during a Rebuild is not recommended.
ONLINE REBUILD
In most cases, Rebuild refers to “Online Rebuild”, meaning the rebuild is initiated
when the RAID System is connected to the host. When the Online Rebuild is
initiated, the RAID System cannot rebuild if it is not connected to the host.
For the USB 2.0 model, it can only support Online Rebuild.
REBUILD EXISTING DATA TO A BACKUP HDD
Due to the Rebuild behavior, the first HDD inserted into one of the HDD trays and
recognized by the RAID System becomes the source HDD. To rebuild existing
data from a source HDD to a backup HDD (target HDD), the source HDD must
first be inserted into one of the two drive bays. After the host detects the source
HDD (in 10 to 15 seconds), and the RAID System indicates the target HDD tray
is empty via the LED disk error light, the target HDD should then be inserted in
the other HDD tray. The RAID System will then recognize the target HDD, the
disk error LED will stop, and the rebuild process will begin automatically. These
actions ensure that the RAID System recognizes the correct source and target
HDDs and to prevent the source data from being overwritten.
The Rebuild Speed of the USB 2.0 Model is 100 GB per hour or 28.4 MB
per second, approximately.

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HOT SWAP
Hot Swap here refers to HDD Hot Swap (Hard Disk Hot Swap), not True Hot
Swap.
The USB 2.0 model does not support HDD Hot Swap in JBOD or Mirror. It is
also not recommended to perform Hot Swapping in Span or Stripe modes.
Ensure that the RAID System is powered "off" before replacing the HDDs.
HDD Hot Swap (Hard Disk Hot Swap) refers to the ability to add or remove
a device from the host computer without powering “off” the device; the system
automatically recognizes the change after the hot swapping is done. True Hot
Swap refers to the ability to add or remove a device from the host computer
when the data is still accessing.
EXTERNAL BOOTUP
The External Bootup can only work for the USB 2.0 Model under DOS for PC
operating system, and Intel-based CPU for Mac OS.
Please review the Troubleshooting section on our website for more
information.

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eSATA/USB 2.0 2-BAY RAID SYSTEM
SYSTEM REQUIREMENTS
PC
266MHz or faster CPU (Microsoft Vista requires a minimum 800MHz CPU)
64MB of RAM (Microsoft Vista requires a minimum 512MB of RAM)
Microsoft Windows 2000, XP, 2003, or Vista
One available USB or eSATA port
MAC
PowerPC or Intel Core Duo processor
64MB of RAM (Mac OS X 10.4 requires 256MB of RAM)
Mac OS 10.2 or higher (PowerPC) or Mac OS X 10.4 (Intel)
One available USB or eSATA port
OPTIONAL ACCESSORIES
eSATA PCI, PCI-X, or PCI-Express Card
SATA compatible hard drive is required for the RAID System. Once the
HDDs are formatted, the actual available storage capacity can vary depending on
selected operating environment (normally 5-10 % less).
PACKAGE CONTENTS
2-bay RAID System
USB Type B to A Cable
eSATA Cable
AC Adapter
Fastening Screws x 8
Quick Start Guide
Quick Start GuideFastening ScrewAC AdapterRAID System eSATA CableUSB Cable
Please keep all package contents and packaging material in the event that
the product must be returned.