Thunderbolt ARC-8050T2 User manual

ARC-8050T2
(Thunderbolt 2 to 6Gb/s SAS RAID Storage)
User Manual
Version: 2.0
Issue Date: January, 2014
Thunderbolt™ Prod uct

Copyright and Trademarks
The information regarding products in this manual is subject to change
without prior notice and does not represent a commitment on the part
of the vendor, who assumes no liability or responsibility for any errors
that may appear in this manual. All brands and trademarks are the
properties of their respective owners. This manual contains materials
protected under International Copyright Conventions. All rights
reserved. No part of this manual may be reproduced in any form or by
any means, electronic or mechanical, including photocopying, without
the written permission of the manufacturer and the author.
FCC Statement
This equipment has been tested and found to comply with the lim-
its for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against in-
terference in a residential installation. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used
in accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interfer-
ence will not occur in a particular installation.
Manufacturer’s Declaration for CE Certication
We conrm ARC-8050T2 has been tested and found comply with the
requirements set up in the council directive on the approximation of
the low of member state relating to the EMC Directive2004/108/EC.
For the evaluation regarding to the electromagnetic compatibility, the
following standards where applied:
EN 55022: 2006, Class B
EN 61000-3-2: 2006
EN 61000-3-3: 1995+A1: 2001+A2: 2005
EN 55024:1998+A1:2001=A2:2003
IEC61000-4-2: 2001
IEC61000-4-3: 2006
IEC61000-4-4: 2004
IEC61000-4-5: 2005
IEC61000-4-6: 2006
IEC61000-4-8: 2001
IEC61000-4-11: 2004

Contents
1. Introduction ................................................................ 8
1.1 Overview .........................................................................8
1.2 Features ........................................................................ 10
2. Installation................................................................ 12
2.1 Before You First Installing................................................. 12
2.2 Summary of RAID Storage Setup Steps.............................. 13
•For Mac OS X................................................................. 13
•For Windows.................................................................. 13
2.3 RAID Storage View.......................................................... 15
2.4 Locations of the Storage Component.................................. 16
2.4.1 Drive Tray LED Indicators ............................................ 16
2.4.2 LCD Panel LED Indicators ............................................ 17
2.4.3 Thunderbolt Port LED Indicators ................................... 17
2.5 Setting Up RAID Storage.................................................. 18
2.5.1 Physically Install RAID Storage and Drives ..................... 18
2.5.2 Mac Users ................................................................. 22
2.5.2.1 Install the MRAID Software ..................................... 22
2.5.2.2 Congure RAID Volumes......................................... 26
2.5.2.3 Format RAID Volumes ............................................ 29
2.5.2.4 Make A Bootable RAID Volume ................................ 31
2.5.2.5 Unmounting RAID Volumes ..................................... 31
2.5.3 Windows Users .......................................................... 32
2.5.3.1 Install the MRAID Software ..................................... 32
2.5.3.2 Congure RAID Volumes......................................... 36
2.5.3.3 Format RAID Volumes ............................................ 39
2.5.3.4 Unmounting RAID Volumes ..................................... 39
3. ArcHTTP Conguration .............................................. 41
• General Conguration ..................................................... 41
• Mail (Alert by Mail) Conguration ..................................... 42
• SNMP Traps Conguration ............................................... 43
• Rescan Device Conguration............................................ 45
• Collect Support Data ...................................................... 45
4. Web Browser-based Conguration ........................... 46
4.1 Start-up McRAID Storage Manager .................................... 47
• McRAID Storage Manager from Local Administration
(In-Band) ..................................................................... 47
•McRAID Storage Manager Through LAN Port (Out-of-Band) 48

4.2 McRAID Main Window ...................................................... 48
4.3 Main Menu .................................................................... 49
4.4 Quick Function................................................................ 49
4.5 Raid Set Functions .......................................................... 50
4.5.1 Create Raid Set ......................................................... 50
4.5.2 Delete Raid Set .......................................................... 51
4.5.3 Expand Raid Set......................................................... 52
4.5.4 Ofine Raid Set .......................................................... 53
4.5.5 Rename Raid Set........................................................ 53
4.5.6 Activate Incomplete Raid Set ....................................... 54
4.5.7 Create Hot Spare ....................................................... 54
4.5.8 Delete Hot Spare........................................................ 55
4.5.9 Rescue Raid Set ......................................................... 55
4.6 Volume Set Functions ...................................................... 56
4.6.1 Create Volume Set (0/1/10/3/5/6) ............................... 57
• Volume Name ................................................................ 57
• Volume Raid Level ......................................................... 57
• Capacity ....................................................................... 57
• Greater Two TB Volume Support....................................... 57
• Initialization Mode .......................................................... 58
• Stripe Size .................................................................... 58
• Cache Mode .................................................................. 59
• Volume Write Protection.................................................. 59
• Full Volume Encryption.................................................... 59
• Tagged Command Queuing .............................................. 60
• SCSI Channel/SCSI ID/SCSI Lun...................................... 60
4.6.2 Create Raid30/50/60 (Volume Set 30/50/60) ................. 61
4.6.3 Delete Volume Set...................................................... 61
4.6.4 Modify Volume Set...................................................... 62
4.6.4.1 Volume Growth ..................................................... 63
4.6.4.2 Volume Set Migration ............................................. 63
4.6.4.3 Volume Write Protection ......................................... 64
4.6.5 Check Volume Set ...................................................... 64
4.6.6 Schedule Volume Check .............................................. 65
4.6.8 Download Volume Key File ........................................... 66
4.7 Physical Drive ................................................................ 67
4.7.1 Create Pass-Through Disk............................................ 67
4.7.2 Modify Pass-Through Disk............................................ 67
4.7.3 Delete Pass-Through Disk ............................................ 68
4.7.4 Clone Disk................................................................. 68
4.7.4.1 Clone And Replace ................................................. 69
4.7.4.2 Clone Only ........................................................... 69

4.7.5 Abort Cloning............................................................. 70
4.7.6 Set Disk To Be Failed .................................................. 70
4.7.7 Activate Failed Disk .................................................... 70
4.7.8 Identify Enclosure ...................................................... 71
4.7.9 Identify Drive ............................................................ 71
4.8 System Controls ............................................................. 72
4.8.1 System Cong ........................................................... 72
• System Beeper Setting ................................................... 72
• Background Task Priority ................................................. 72
• JBOD/RAID Conguration ................................................ 72
• SATA NCQ Support ......................................................... 73
• HDD Read Ahead Cache .................................................. 73
• Volume Data Read Ahead ............................................... 73
• HDD Queue Depth ......................................................... 73
• Empty HDD Slot LED ...................................................... 73
• Max Command Length .................................................... 74
• Auto Activate Incomplete Raid ......................................... 74
• Disk Write Cache Mode ................................................... 74
• Write Same For Initialization............................................ 74
• Hot Plugged Disk For Rebuilding ....................................... 74
• Disk Capacity Truncation Mode......................................... 75
• Smart Option For HDD .................................................... 75
• Smart Polling Interval ..................................................... 76
4.8.2 Advanced Conguration............................................... 76
• TLER Setting ................................................................. 76
• Timeout Setting ............................................................. 77
• Number of Retries .......................................................... 77
• Buffer Threshold ............................................................ 77
• Amount of Read Ahead ................................................... 78
• Number of AV Stream ..................................................... 78
• Optimize AV Recording.................................................... 78
• Read Performance Margin................................................ 79
• Write Performance Margin ............................................... 79
• Read And Discard Parity Data .......................................... 79
• BIOS Selection............................................................... 79
4.8.3 HDD Power Management ............................................. 80
•Stagger Power On Control .............................................. 80
•Time to Hdd Low Power Idle ........................................... 81
•Time To Hdd Low RPM Mode ........................................... 81
•SATA Power Up In Standby ............................................. 81
4.8.4 Ethernet Conguration ............................................... 81
•DHCP Function............................................................... 82

•Local IP address............................................................. 82
•Gateway IP address........................................................ 83
•Subnet Mask ................................................................. 83
• HTTP Port Number.......................................................... 83
•Telnet Port Number ........................................................ 83
•SMTP Port Number ......................................................... 83
4.8.5 Alert By Mail Conguration ......................................... 83
4.8.6 SNMP Conguration .................................................... 84
4.8.7 NTP Conguration ...................................................... 84
• NTP Sever Address ......................................................... 85
• Time Zone..................................................................... 85
• Automatic Daylight Saving............................................... 85
4.8.8 View Events/Mute Beeper ............................................ 85
4.8.9 Generate Test Event ................................................... 86
4.8.10 Clear Events Buffer ................................................... 86
4.8.11 Modify Password....................................................... 87
4.8.12 Update Firmware ..................................................... 87
4.9 Information.................................................................... 88
4.9.1 Raid Set Hierarchy...................................................... 88
4.9.2 SAS Chip Information ................................................. 88
4.9.3 System Information.................................................... 89
4.9.4 Hardware Monitor....................................................... 89
Appendix A ................................................................... 90
Upgrading Flash ROM Update Process...................................... 90
Appendix B .................................................................... 93
Battery Backup Module ......................................................... 93
(ARC-6120BA-T021).............................................................. 93
B-1 BBM Connector and Components .................................. 93
B-2 Status of BBM ............................................................ 93
B-3 Installation ................................................................ 94
Appendix C .................................................................... 97
SNMP Operation & Installation................................................ 97
Appendix D.................................................................. 102
Event Notication Congurations ........................................ 102
A. Device Event.............................................................. 102
B. Volume Event............................................................. 103
C. RAID Set Event .......................................................... 104
D. Hardware Monitor Event .............................................. 104
Appendix E .................................................................. 106
RAID Concept .................................................................... 106
RAID Set ......................................................................... 106

Volume Set...................................................................... 106
Ease of Use Features......................................................... 107
• Foreground Availability/Background Initialization .............. 107
• Online Array Roaming ................................................... 107
•Online Capacity Expansion............................................. 107
• Online RAID Level and Stripe Size Migration .................... 109
•Online Volume Expansion .............................................. 110
High Availability ............................................................... 110
•Global/Local Hot Spares ................................................ 110
•Hot-Swap Disk Drive Support......................................... 111
•Auto Declare Hot-Spare ............................................... 111
• Auto Rebuilding ........................................................... 112
•Adjustable Rebuild Priority............................................. 112
High Reliability ................................................................. 113
•Hard Drive Failure Prediction.......................................... 113
•Auto Reassign Sector.................................................... 113
•Consistency Check ....................................................... 114
Data Protection ................................................................ 114
•Battery Backup ........................................................... 114
• Recovery ROM ............................................................. 115
Appendix F .................................................................. 116
Understanding RAID .......................................................... 116
RAID 0............................................................................ 116
RAID 1............................................................................ 117
RAID 10(1E) .................................................................... 118
RAID 3............................................................................ 118
RAID 5............................................................................ 119
RAID 6............................................................................ 120
RAID x0 .......................................................................... 120
Single Disk (Pass-Through Disk) ......................................... 121
Summary of RAID Levels ................................................... 122

INTRODUCTION
8
1. Introduction
This section presents a brief overview of the 6Gb/s SAS RAID storage,
ARC-8050T2. (Thunderbolt 2 to 6Gb/s SAS RAID storage)
1.1 Overview
Unleash Your Creativity Faster Than Ever
Thunderbolt 2 is full backward compatibility to the same cables
and connectors used with today’s Thunderbolt. It pushes speed to
20Gb/s and enables 4K video le transfer and display simultane-
ously. ARC-8050T2 is equipped with dual Thunderbolt 2 ports for
connecting to any Thunderbolt 2-enabled host such as the new Mac
Pro, and offers an additional Thunderbolt 2 port for daisy-chaining
other peripherals. The Thunderbolt daisy-chaining allows connec-
tion of up to six devices, so customers can connect ARC-8050T2
for massive amounts of video storage with a single Thunderbolt
connection to their host computer. ARC-8050T2 can meet the de-
mand of users when working with rich, ultra- high resolution media
through Thunderbolt 2 interface.
Unparalleled Performance for 4K Workow
ARC-8050T2 is the most complete 6Gb/s SAS 8-bay Thunderbolt
2 box with RAID control capabilities solution for both PC and Mac.
ARC-8050T2 incorporated on-board dual core 800Mhz RAID-On-
Chip and with 1GB DDR3-1333 memory to deliver true high perfor-
mance hardware RAID protection against drive failure.This combi-
nation helps to provide a high performance storage device perfect
for the video editor working with Real time multi-stream HD and 4K
workows. It runs efciently without disruption or major drops in
performance to meet the requirements of 4K data workow. It is so
quick it allows for 4K displays at the same time as daisy chaining
ARC-8050T2 and doing a simultaneous 4K output and le transfers
while maintaining maximum throughput.

INTRODUCTION
9
Enterprise-class Data Availability and Security
ARC-8050T2 supports the hardware RAID 6 engine to allow two
HDDs failures without impact the existing data and performance.
It allows users to hot swap drive in the event of a drive failure
with zero downtime. Its high data availability and protection de-
rives from many advanced RAID features on ARC-8050T2 RAID
box design. Intelligent power On/Off function on storage turns
power in unison with the host computer power status. It can intel-
ligently power down the unit after the thunderbolt host shuts down
everything for data integrity. ARC-8050T2 also supports a battery
backup option that protects all data in cache memory in the event
of unexpected power outage. Board-level hardware encryption
manages any kinds of drives attached to ARC-8050T2 without im-
pacting the performance for higher levels of security.
Enabling an Easy-to-Manage Storage
Conguration and monitoring can be managed either through the
LCD control panel, Thunderbolt interface or LAN port. The intel-
ligent cooling continuously adapts to environmental conditions by
automatically controlling the speed of the cooling fans for the rap-
idly growing demand from the video editing markets. You can even
congure ARC-8050T2 to intelligently spin down drives during
periods of inactivity to further reduce noise and save energy. Areca
solution of Thunderbolt 2 provides user the capability of adding
bootable drive via Thunderbolt on Apple thunderbolt-capable ma-
chine.

INTRODUCTION
10
1.2 Features
Controller Architecture
• 800 MHz dual core ROC for RAID core and SAS microcode
• 1GB on-board DDR3-1333 SDRAM with ECC protection
• Support bootable from RAID storage volume
• Controller level hardware encryption support
• Redundant ash image for adapter availability
• System status indication through LCD, LED and alarm buzzer
• Intelligent power On/Off function
• Battery backup module ready (Optional)
RAID Features
• RAID level 0, 1, 1E, 3, 5, 6, 10, 30, 50, 60, Single Disk or JBOD
• Multiple RAID selection
• Support up to 1MB stripe size
• Online array roaming
• Online RAID level/stripe size migration
• Support global hot spare and local hot spare
• Instant availability and background initialization
• Advanced conguration for smooth data streaming
• Disk scrubbing/ array verify scheduling support
• Multiple pairs SSD/HDD disk clone function
• SSD automatic monitor clone (AMC) support
• Complete conguration management suite
- McRAID manager – browser-based management tool (LAN or
Thunderbolt)
- Push Buttons and LCD Display panel for setup and status
- Command Line Interface (CLI) – scriptable conguration tool
- API libraries support – combine GUI with user management
utility
- SNMP support for remote monitoring
- SMTP support for email notication
Important:
Be sure to update the ArcMSR.kext driver shipping with Mac
OS X to V1.3.7 or later from the software CD or from the
Areca website.

INTRODUCTION
11
Function Advantages
Features Benets
Bootable Drive Support Provide user the capability of adding bootable drive
via Thunderbolt on Apple thunderbolt-capable
machine.
Advanced Conguration Provide optimized parameter to adjust controlled
rmware behavior for smooth data streaming.
Controller-level Hardware
Encryption
Board-level hardware encryption manages any
kinds of drives attached to ARC-8050T2 without
impacting the performance for higher levels of
security.
BBM Support Support a battery backup option that protects all
data in cache memory in the event of unexpected
power outage.
Intelligent power On/Off
function
Turn ARC-8050T2 power in unison with the host
computer power status for data integrity.
Front Panel LCD and Buttons Easy access for conguration and status report.
Product Features
Form Factor Compact – 8 Bays Disk Tower
Host Connection Two 20 Gb/s Thunderbolt Technology Ports
Disk Support 8 x 6Gb/s SAS/SATA 3.5”/2.5”HDDs/SSDs
OS Support Mac OS X 10.8.5 or Higher
& Windows 7/8
Enclosure Management Thunderbolt Port, LAN Port, and LCD
Cooling Fan 2 * 2700rpm/0.135A Brushless Fan
Operating Temperature 0 ~ 40 C
Operation Humidity 5% ~ 95 %, Non-condensing
Power Supply/In/out 270W / 90-256V AC / +12V/26A, +5V/18A, +3.3V/16A
Dimension (W x H x D) 5.7 x 11.8 x 11.4 in
(146 x 302 x 290 mm)
Weight (W/O Drives) 14.9 lbs / 6.8Kg

INSTALLATION
12
2. Installation
This section describes how to install the ARC-8050T2 Thunderbolt 2
RAID storage with host computer and disks.
2.1 Before You First Installing
Thanks for purchasing the ARC-8050T2 as your RAID data storage.
The following manual gives simple step-by-step instructions for
installing and conguring the ARC-8050T2 RAID storage.
Unpack
Unpack and install the hardware in a static-free environment.
ARC-8050T2 RAID storage is packed inside an anti-static bag
between two sponge sheets. Remove it and inspect it for dam-
age. If the ARC-8050T2 RAID storage appears damaged, or if any
items of the contents listed below are missing or damaged, please
contact your dealer or distributor immediately.
Checklist
• 1 x ARC-8050T2 8-bays RAID storage unit
• 1 x Installation CD – containing driver, relative software, an
electronic version of this manual and other related manual
• 1 x RJ-45 LAN cable
• 1 x Power cord
• 32 x Drive mounting screws (4 per drive tray)
• 1 x Quick start guide
System Requirements
• Computer with Thunderbolt connector
• Thunderbolt cable
• Mac OS X 10.8.5 or higher
• Windows 7&8
“For Windows PC: the Thunderbolt certied device driver must be
installed before plugging in the device for it to function properly”

INSTALLATION
13
2.2 Summary of RAID Storage Setup Steps
•For Mac OS X
Step 1. Physically Install the Hardware (Chapter 2.5.1)
1. Install HDDs.
2. Connect power cord.
3. Connect Thunderbolt cable.
Step 2. Install the MRAID Software Package (Chapter 2.5.2.1)
1. Download the install_mraid installer from the website at
“http://www.areca.com.tw/support/s_ thunderbolt/thunder
bolt.htm”.
2. Double-click on the install_mraid zipped le.
3. Double-click on the install_mraid icon on the Finder.
4. Follow the installer on-screen steps to complete the installa-
tion.
Step 3. Congure RAID Volumes (Chapter 2.5.2.2)
1. Double-click on the “MRAID” icon on the desktop.
2. Double-click on the “ArcHTTP64”.
3. Locate “ARC-8050T2 Web Management” and launch the
McRAID storage manager.
4. Login User Name “admin” and the Password “0000”.
5. Click on the “Quick Create” to congure the volume.
6. Follow the on-screen steps to complete the conguration.
Step 4. Format RAID Volumes (Chapter 2.5.2.3)
1. Mac OS X recognizes that a new disk is available.
2. Follow the Disk Utility on-screen steps to initialize and parti-
tion your unit.
3. Icons for each new partition show up on your desktop.
4. They are now ready to use.
•For Windows
Step 1. Physically Install the Hardware (Chapter 2.5.1)
1. Install HDDs.
2. Connect power cord.
3. Connect Thunderbolt cable.

INSTALLATION
14
Step 2. Install the MRAID Software Package (Chapter 2.5.3.1)
1. Download the install_mraid installer from the website at
“http://www.areca.com.tw/support/s_ thunderbolt/thunder
bolt.htm”.
2. Double-click on the install_mraid zipped le.
3. Double-click on the “setup.exe” unzip le.
4. Follow the installer on-screen steps to complete the installa-
tion.
Step 3. Congure RAID Volumes (Chapter 2.5.3.2)
1. Double-click on the “MRAID” icon on the desktop.
2. Double-click on the “ArcHTTP64”.
3. Locate “ARC-8050T2 Web Management” and launch the
McRAID storage manager.
4. Login User Name “admin” and the Password “0000”.
5. Click on the “Quick Create” to congure the volume.
6. Follow the on-screen steps to complete the conguration.
Step 4. Format RAID Volumes (Chapter 2.5.3.3)
1. Click “Start” ==> right-click “Computer” and select “Man-
age”.
2. Click “Disk Management” in the left pane.
3. Scroll down to the bottom of the middle pane. Windows will
display a list of new drives attached to your system with a
label such as “Disk 1” or “Disk 2”, etc.
4. Right-click on the drive you want to partition and then again
to format it.
5. Once it’s formatted, Windows automatically assigns the next
available drive letter to it and then it will appear in Windows
Explorer.
6. They are now ready to use.

INSTALLATION
15
Front View Rear View
1. Disk Activity LED
2. Disk Fault/Link LED
3. LCD Panel with Keypad
4. Thunderbolt Port1
5. Thunderbolt Port2
6. Thunderbolt Port1 Link LED
7. Thunderbolt Port2 Link LED
8. System Fan1
9. LAN Port
(For McRAID Web Manager)
10. Reset Button
11. System Fan2
12. Power Connector
13. Power Supply Fan
2.3 RAID Storage View
The following diagram is the RAID storage front view and rear view.

INSTALLATION
16
2.4 Locations of the Storage Component
The following components come with LEDs that inform ARC-8050T2
RAID storage managers about the operational status.
2.4.1 Drive Tray LED Indicators
Figure 2-1, Activity/Fault LED
The following table describes the RAID storage disk drive tray LED
behavior.
Tray LED Normal Status Problem Indication
1. Activity LED
(Blue)
1. When the activity LED
is lit, there is I/O acti-
vity on that disk drive.
2. When the LED is not
lit; there is no activity
on that disk drive.
N/A
2. Fault/Link LED
(Red/Green)
1. When the fault LED is
lit, there is no disk
present.
2. When the link LED is
lit, there is a disk pre-
sent.
1. When the fault LED is off, the
disk is present and status is
normal.
2. When the fault LED is blinking
(2 times/sec.), the disk drive
has failed and should be hot-
swapped immediately.
3. When the activity LED is lit
and fault LED is fast blinking
(10 times/sec.) there is re-
building activity on that disk
drive.

INSTALLATION
17
2.4.2 LCD Panel LED Indicators
There are a variety of status conditions that cause the RAID stor-
age panel monitoring LED to light. The front panel LCD comes
with three (3) status-indicating LEDs. The LEDs on the front panel
are dened, from top to bottom, Power, Busy, and Caution, as
shown in Figure 2-2.
Figure 2-2, LCD Panel LED
The following table provides a summary of the front panel LED.
2.4.3 Thunderbolt Port LED Indicators
Figure 2-3, Thunderbolt Ports LED
Panel LED Normal Status Problem Indication
1. Power LED
(Green)
Solid green, when power on. Unlit, when power on.
2. Busy LED
(Amber)
Blinking amber during host ac-
cesses RAID storage.
Unlit or never icker.
3. Caution LED
(Red)
Unlit indicates that the RAID
storage and all its components
are operating correctly.
Solid indicates that one or
more component failure/Ur-
gent events have occurred.
The following table describes the ARC-8050T2 SAS RAID storage
Thunderbolt port link LED behavior.

INSTALLATION
18
2.5 Setting Up RAID Storage
Setting up your ARC-8050T2 RAID storage involves these main
steps:
• Physically Install the RAID Storage and Drives
• Install the MRAID Software
• Congure RAID Volumes
• Format RAID Volumes
• Unmounting RAID Volumes
Details about these steps are described in the following sections.
2.5.1 Physically Install RAID Storage and Drives
Please follow the steps below in order they are given to ensure
that your ARC-8050T2 connected on your Thunderbolt computer.
Step 1. Install the Drives in the ARC-8050 RAID Storage
Your RAID storage supports up to 8 x 3.5-inch disk drives or 8 x
2.5-inch SAS or SATA 6.0Gb/s drives, each one contained in its
individual hole on the disk carrier. Each drive is hot-pluggable,
allowing you to remove and insert drives without shutting down
your RAID storage. Installation in this section describes how to
install or remove 3.5 inch drives in your RAID storage.
1. Gently slide the drive tray out from the ARC-8050 RAID
storage.
Thunderbolt Ports
Link LED Status
Green light 1. Lit indicates RAID storage is powered and maintained
the daisy chain with other Thunderbolt devices.
2. Blinking (5 times/sec) that indicates RAID storage is
in sleep mode.
3. Blinking (1 time/sec) that indicates RAID storage is
powered down and maintained the daisy chain with
other Thunderbolt devices.
Amber light There is a proper DisplayPort connection on that Thun-
derbolt port.
Red light There is a proper DisplayPort to DVI connection on that
Thunderbolt port.

INSTALLATION
19
2. Install the drive into the drive tray and secure the drive to the
drive tray by four of the mounting screws.
Figure 2-5, Sliding Drive Tray into Enclosure
3. After all drives are in the drive tray, slide all of them back into
the ARC-8050 RAID storage and make sure you latch the drive
trays.
Step 2. Connecting RAID Storage to Thunderbolt Ports
Thunderbolt connectors are provided on the back of the ARC-8050
RAID storage for connecting the array to Thunderbolt host and
next Thunderbolt devices. There are two Thunderbolt connectors
on the rear of ARC-8050 RAID storage. You can plug-in two host
ports.
1. Direct connection to a Thunderbolt technology capable
computer.
2. Daisy chaining Thunderbolt capable devices and displays.
Figure 2-4-1. Installing 2.5-inch
SAS/SATA Drive
Figure 2-4-2. Installing 3.5-inch
SAS/SATA Drive

INSTALLATION
20
• Thunderbolt Computer Port Connection
By installing Thunderbolt technology capable computer and
ARC-8050 Thunderbolt port using the Thunderbolt cable which
is included in your Thunderbolt capable computer. Then connect
ARC-8050 RAID storage and Thunderbolt technology capable
computer port as shown below:
• Daisy Chain Topologies
A single Thunderbolt technology daisy chain can have seven
devices, including the computer. Connect the cable to one of the
interface ports on the back of your ARC-8050 RAID storage and
to your Thunderbolt capable computer. The additional port may
be used to daisy chain compatible computer peripherals, such
as hard drives, monitors, and much more. A single Thunderbolt
port supports hubs as well as a daisy chain of up to seven Thun-
derbolt devices on, including the Thunderbolt capable computer.
Figure 2-6, Connecting to Thunderbolt computer