Areca ARC-8042-12 User manual

ARC-8042-12 SAS Desktop RAID
Subsystem
RAID Subsystem
User’s Manual
Version: 1.1
Issue Date: July, 2018

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 limits
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-8042-12 12-bays 12Gb/s SAS RAID subsystem has
been tested and found compliant with the requirements in the council
directive relating to the EMC Directive 2004/108/EC. Regarding to the
electromagnetic compatibility, the following standards were 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 .............................................................. 12
1.1 Overview ........................................................................ 12
1.2 Technical Specications..................................................... 14
1.3 RAID subsystem View....................................................... 17
1.4 Locations of the Subsystem Component .............................. 18
1.4.1 Drive Tray LED Indicators ............................................. 18
1.4.2 LCD Panel LED Indicators ............................................. 19
1.5 RAID Subsystem Alarm..................................................... 19
1.6 Expansion Connection....................................................... 20
2. Hardware Installation ............................................... 21
2.1 Installing or Removing Drives in the Subsystem ................... 22
2.1.1 Installing Drives in the Subsystem................................. 22
2.1.2 Removing Drives from the Subsystem ............................ 23
2.1.3 Adding a Battery Backup Module (Optional) .................... 23
2.2 Connecting the RAID Subsystem ....................................... 24
2.2.1 Connecting to Host System .......................................... 24
2.2.2 Expansion Port Connection ........................................... 24
2.2.3 Connecting Monitor Port ............................................... 25
2.2.4 Power Up the RAID Subsystem ..................................... 27
2.3 Conguring RAID Subsystems............................................ 28
2.3.1 Conguring Method ..................................................... 28
2.3.2 Format, Partition and Mount the SAS RAID Subsystem Vol-
umes ................................................................................. 29
3. Conguration Methods .............................................. 30
3.1 Using local front panel touch-control keypad........................ 30
3.2 VT100 terminal (Using the controller’s serial port) ................ 32
3.2.1 RS-232C Port Pin Assignment........................................ 32
3.2.2 Start-up VT100 Screen................................................. 33
3.3 Web browser-based RAID manager..................................... 36
3.4 Conguration Menu Tree ................................................... 36
4. LCD Conguration Menu ............................................ 38
4.1 Starting LCD Conguration Utility ....................................... 38
4.2 LCD Conguration Utility Main Menu Options........................ 39
4.3 Conguring Raid Sets and Volume Sets ............................... 39
4.4 Designating Drives as Hot Spares....................................... 40
4.5 Using Easy RAID Conguration .......................................... 40
4.6 Using Raid Set and Volume Set Functions ........................... 42

4.7 Navigation Map of the LCD ............................................... 43
4.7.1 Quick Volume And Raid Setup ....................................... 44
4.7.2 Raid Set Functions....................................................... 44
4.7.2.1 Create A New Raid Set ........................................... 45
4.7.2.2 Delete Raid Set ...................................................... 45
4.7.2.3 Expand Raid Set ..................................................... 46
4.7.2.4 Ofine Raid Set ...................................................... 46
4.7.2.5 Activate Incomplete RaidSet..................................... 47
4.7.2.6 Create Hot Spare Disk............................................. 47
4.7.2.7 Delete Hot Spare Disk ............................................. 47
4.7.2.8 Display Raid Set Information .................................... 47
4.7.3 Volume Set Functions .................................................. 48
4.7.3.1 Create Raid Volume Set .......................................... 48
4.7.3.1.1 Volume Name..................................................... 49
4.7.3.1.2 Raid Level ......................................................... 49
4.7.3.1.3 Stripe Size ......................................................... 49
4.7.3.1.4 Cache Mode ....................................................... 50
4.7.3.1.5 SAS Port/SAS LUN Base/SAS LUN ......................... 50
4.7.3.1.6 Tagged Queuing.................................................. 50
4.7.3.1.7 Initialization Mode............................................... 51
4.7.3.2 Delete Existed Volume Set ....................................... 51
4.7.3.3 Modify Volume Set Attribute..................................... 51
4.7.3.3.1 Volume Set Migration .......................................... 52
4.7.3.4 Check Volume Set Consistency ................................. 52
4.7.3.5 Stop Volume Set Consistency Check.......................... 53
4.7.3.6 Display Volume Set Information................................ 53
4.7.4 Physical Drive Functions .............................................. 53
4.7.4.1 Display Drive Information ....................................... 55
4.7.4.2 Create Pass Through Disk ....................................... 55
4.7.4.3 Modify Pass-Through Disk ....................................... 55
4.7.4.4 Delete Pass-Through Disk ........................................ 56
4.7.4.5 Identify The Selected Drive ...................................... 56
4.7.5 Raid System Functions ................................................. 56
4.7.5.1 Mute The Alert Beeper ............................................ 58
4.7.5.2 Alert Beeper Setting ............................................... 58
4.7.5.3 Change Password ................................................... 58
4.7.5.4 JBOD/RAID Mode Conguration ................................ 58
4.7.5.5 Raid Rebuild Priority................................................ 59
4.7.5.6 SATA NCQ Mode Support ......................................... 59
4.7.5.7 HDD Read Ahead Cache........................................... 59
4.7.5.8 Volume Data Read Ahead......................................... 59
4.7.5.9 Disk Write Cache Mode............................................ 60

4.7.5.10 Disk Capacity Truncation Mode................................ 60
4.7.5.11 Shutdown The Controller....................................... 60
4.7.5.12 Restart Controller ................................................. 61
4.7.6 Hdd Power Management............................................... 61
4.7.6.1 Stagger Power On Control........................................ 61
4.7.6.2 Time To Hdd Low Power Idle .................................... 62
4.7.6.3 Time To Hdd Low RPM Mode..................................... 62
4.7.6.4 Time To Spin Down Idle HDD .................................. 62
4.7.7 Ethernet Conguration ................................................. 62
4.7.7.1 DHCP .................................................................... 62
4.7.7.2 Local IP Adress....................................................... 63
4.7.7.3 HTTP Port Number .................................................. 63
4.7.7.4 Telnet Port Number ................................................. 63
4.7.7.5 SMTP Port Number.................................................. 64
4.7.7.6 Ethernet Address .................................................... 64
4.7.8 Show System Events ................................................... 64
4.7.9 Clear all Event Buffers.................................................. 64
4.7.10 Hardware Monitor Information..................................... 64
4.7.11 System Information ................................................... 65
5. VT-100 Utility Conguration ..................................... 66
5.1 Conguring Raid Sets/Volume Sets..................................... 66
5.2 Designating Drives as Hot Spares....................................... 67
5.3 Using Quick Volume /Raid Setup Conguration ..................... 67
5.4 Using Raid Set/Volume Set Function Method ........................ 69
5.5 Main Menu ..................................................................... 70
5.5.1 Quick Volume/Raid Setup ............................................. 71
5.5.2 Raid Set Function ........................................................ 75
5.5.2.1 Create Raid Set ..................................................... 75
5.5.2.2 Delete Raid Set ...................................................... 77
5.5.2.3 Expand Raid Set ..................................................... 77
5.5.2.4 Ofine Raid Set ...................................................... 79
5.5.2.5 Activate Raid Set .................................................... 79
5.5.2.6 Create Hot Spare.................................................... 80
5.5.2.7 Delete Hot Spare .................................................... 80
5.5.2.8 Rescue Raid Set ..................................................... 81
5.5.2.9 Raid Set Information............................................... 81
5.5.3 Volume Set Function .................................................... 82
5.5.3.1 Create Volume Set (0/1/10/3/5/6) ............................ 83
5.5.3.1.1 Volume Name..................................................... 84
5.5.3.1.2 Raid Level.......................................................... 85
5.5.3.1.3 Capacity ............................................................ 85

5.5.3.1.4 Stripe Size ......................................................... 87
5.5.3.1.5 SAS Port # ........................................................ 87
5.5.3.1.6 LUN Base........................................................... 88
5.5.3.1.7 SAS LUN............................................................ 88
5.5.3.1.8 Cache Mode ....................................................... 89
5.5.3.1.9 Tag Queuing....................................................... 89
5.5.3.2 Create Raid30/50/60............................................... 90
5.5.3.3 Delete Volume Set .................................................. 91
5.5.3.4 Modify Volume Set .................................................. 91
5.5.3.4.1 Volume Growth................................................... 92
5.5.3.4.2 Volume Set Migration .......................................... 93
5.5.3.5 Check Volume Set................................................... 93
5.5.3.6 Stop Volume Set Check ........................................... 94
5.5.3.7 Display Volume Info. ............................................... 94
5.5.4 Physical Drives............................................................ 95
5.5.4.1 View Drive Information ........................................... 95
5.5.4.2 Create Pass-Through Disk ........................................ 96
5.5.4.3 Modify Pass-Through Disk ........................................ 96
5.5.4.4 Delete Pass-Through Disk ........................................ 97
5.5.4.5 Identify Selected Drive ............................................ 97
5.5.4.6 Identify Enclosure................................................... 98
5.5.5 Raid System Function .................................................. 98
5.5.5.1 Mute The Alert Beeper ............................................ 99
5.5.5.2 Alert Beeper Setting................................................ 99
5.5.5.3 Change Password ................................................. 100
5.5.5.4 JBOD/RAID Function ............................................. 100
5.5.5.5 Background Task Priority ....................................... 101
5.5.5.6 SATA NCQ Support................................................ 101
5.5.5.7 HDD Read Ahead Cache......................................... 102
5.5.5.8 Volume Data Read Ahead....................................... 103
5.5.5.9 Hdd Queue Depth Setting ...................................... 103
5.5.5.10 Disk Write Cache Mode ........................................ 104
5.5.5.11 Auto Activate Raid Set ......................................... 104
5.5.5.12 Capacity Truncation ............................................ 105
5.5.5.13 Update Firmware ................................................ 106
5.5.5.14 Shutdown Controller............................................ 106
5.5.5.15 Restart Controller ............................................... 107
5.5.6 More System Functions .............................................. 107
5.5.6.1 Smart Option For HDD .......................................... 108
5.5.6.2 Smart Polling Interval ........................................... 109
5.5.6.3 Hot Plugged Disk For Rebuilding ............................ 109
5.5.6.4 End Device Frame Buffering .................................. 110

5.5.7 HDD Power Management ............................................ 111
5.5.7.1 Stagger Power On................................................. 112
5.5.7.2 Time to Hdd Low Power Idle (Minutes)..................... 113
5.5.7.3 Time To Low RPM Mode (Minutes) ........................... 113
5.5.7.4 Time To Spin Down Idle Hdd (Minutes) .................... 114
5.5.8 In Band SAS Cong ................................................... 114
5.5.8.1 Inband SAS Function............................................. 115
5.5.8.2 Inband SAS Port ................................................... 115
5.5.9 Ethernet Conguration .............................................. 116
5.5.9.1 DHCP Function ..................................................... 117
5.5.9.2 Local IP Address ................................................... 117
5.5.9.3 HTTP Port Number ................................................ 118
5.5.9.4 Telnet Port Number ............................................... 119
5.5.9.5 SMTP Port Number................................................ 119
5.5.9.6 Ethernet Address .................................................. 120
5.5.10 Alert By Mail Conguration ....................................... 120
5.5.10.1 SMTP Server Conguration................................... 120
5.5.10.2 Mail Address Congurations.................................. 121
5.5.10.3 Event Notication Congurations........................... 122
5.5.11 View System Events................................................. 124
5.5.12 Clear Events Buffer .................................................. 124
5.5.13 Hardware Monitor Information................................... 124
5.5.14 System Information ................................................. 125
6. Web Browser-based Conguration ......................... 126
6.1 Web Browser McRAID Storage Manager............................. 126
6.2 Web Browser Start-up Screen ......................................... 127
6.3 Main Menu ................................................................... 127
6.4 Quick Function............................................................... 128
6.5 Raid Set Functions ......................................................... 129
6.5.1 Create a New Raid Set .............................................. 129
6.5.2 Delete Raid Set ......................................................... 130
6.5.3 Expand Raid Set........................................................ 130
6.5.4 Ofine Raid Set......................................................... 131
6.5.5 Rename Raid Set....................................................... 132
6.5.6 Activate Incomplete Raid Set ...................................... 132
6.5.7 Create Hot Spare ...................................................... 133
6.5.8 Delete Hot Spare....................................................... 134
6.5.9 Rescue Raid Set ........................................................ 134
6.6 Volume Set Functions ..................................................... 135
6.6.1 Create Volume Set (0/1/10/3/5/6) .............................. 135
6.6.2 Create Raid30/50/60 (Volume Set 30/50/60) ................ 139

6.6.3 Delete Volume Set..................................................... 139
6.6.4 Modify Volume Set..................................................... 140
6.6.4.1 Volume Growth .................................................... 141
6.6.4.2 Volume Set Migration ............................................ 141
6.6.5 Check Volume Set ..................................................... 142
6.6.6 Schedule Volume Check ............................................. 143
6.6.7 Stop Volume Check.................................................... 144
6.7 Security Function ........................................................... 144
6.7.1 Create SED RAID Set ................................................ 144
6.7.2 Delete SED RAID Set ................................................ 145
6.7.3 Delete ISE RAID Set ................................................. 146
6.7.4 Security Key Setup .................................................... 146
6.7.4.1 SED Key Management-Creation .............................. 147
6.7.4.2 SED Key Management-Modication ......................... 147
6.7.5 Import Security Key................................................... 148
6.7.6 Erase Failed Disk ....................................................... 149
6.8 Physical Drive ............................................................... 150
6.8.1 Create Pass-Through Disk........................................... 150
6.7.7 RevertSP.................................................................. 150
6.8.2 Modify a Pass-Through Disk ........................................ 151
6.8.3 Delete Pass-Through Disk ........................................... 152
6.8.4 Clone Disk................................................................ 152
6.8.4.1 Clone And Replace ................................................ 153
6.8.4.2 Clone Only .......................................................... 153
6.8.5 Abort Cloning............................................................ 153
6.8.6 Set Disk To Be Failed ................................................. 154
6.8.7 Activate Failed Disk ................................................... 154
6.8.8 Identify Enclosure ..................................................... 155
6.8.9 Identify Drive ........................................................... 155
6.9 System Controls ............................................................ 156
6.9.1 System Cong .......................................................... 156
• System Beeper Setting .................................................. 156
• Background Task Priority ................................................ 156
• JBOD/RAID Conguration ............................................... 156
• SATA NCQ Support ........................................................ 157
• HDD Read Ahead Cache ................................................. 157
• Volume Data Read Ahead ............................................... 157
• HDD Queue Depth ........................................................ 157
• Disk Write Cache Mode .................................................. 158
• Write Same For Initialization........................................... 158
• Hot Plugged Disk For Rebuilding...................................... 158
• Disk Capacity Truncation Mode........................................ 158

6.9.2 Advanced Conguration.............................................. 160
6.9.3 Hdd Power Management............................................. 166
6.9.3.1 Stagger Power On Control...................................... 166
6.9.3.2 Time To Hdd Low Power Idle .................................. 167
6.9.3.3 Time To Hdd Low RPM Mode .................................. 167
6.9.3.4 Time To Spin Down Idle HDD ................................ 167
6.9.3.5 Time To Wait HDD Spin Up ................................... 167
6.9.3.6 SATA Power Up In Standby ................................... 167
6.9.4 Ethernet Conguration .............................................. 168
6.9.5 Alert By Mail Conguration ........................................ 169
6.9.6 SNMP Conguration ................................................... 169
• SNMP Trap Congurations .............................................. 170
• SNMP System Congurations .......................................... 170
• SNMP Trap Notication Congurations.............................. 170
6.9.7 NTP Conguration ..................................................... 171
• Time Zone.................................................................... 171
• Automatic Daylight Saving ............................................. 171
6.9.8 View Events/Mute Beeper ........................................... 172
6.9.9 Generate Test Event .................................................. 173
6.9.10 Clear Events Buffer .................................................. 173
6.9.11 Modify Password...................................................... 174
6.9.12 Upgrate Firmware ................................................... 174
6.9.13 Shutdown Controller ............................................... 175
6.9.14 Restart Controller ................................................... 175
6.10 Information ................................................................. 176
6.10.1 Raid Set Hierarchy ................................................... 176
6.9.1.1 Hdd Xfer Speed .................................................... 176
6.10.2 SAS Chip Information............................................... 177
6.10.3 System Information ................................................. 178
6.10.4 Hardware Monitor .................................................... 178
Appendix A .................................................................. 179
Upgrading Flash ROM Update Process .................................... 179
Establishing the Connection for the RS-232............................. 179
Upgrade Firmware Through ANSI/VT-100 Terminal Emulation .... 180
Upgrade Firmware Through Web Browser Manager (LAN Port) ... 183
Appendix B .................................................................. 184
Battery Backup Module (ARC-6120BA-T121-12G)..................... 184
Appendix C .................................................................. 188
SNMP Operation & Denition ................................................. 188
Appendix D.................................................................. 190
Event Notication Congurations ......................................... 190

A. Device Event............................................................... 190
B. Volume Event.............................................................. 191
C. RAID Set Event ........................................................... 192
D. Hardware Monitor Event ............................................... 192
Appendix E .................................................................. 194
Self-Encrypting Disk (SED) Encryption.................................. 194
Appendix F .................................................................. 200
RAID Concept ..................................................................... 200
RAID Set .......................................................................... 200
Volume Set....................................................................... 200
Easy of Use Features.......................................................... 201
• Instant Availability/Background ...................................... 201
• Online Array Roaming/Ofine RAID set............................. 201
• Online Capacity Expansion.............................................. 201
• Online RAID Level and Stripe Size Migration ..................... 202
High availability................................................................. 203
• Global/Dedicated Hot Spares .......................................... 203
• Hot-Swap Disk Drive Support.......................................... 203
• Hot-Swap Disk Rebuild................................................... 204
Understanding RAID .......................................................... 204
• RAID 0 ........................................................................ 204
•RAID 1 ........................................................................ 205
• RAID 10(1E)................................................................. 206
• RAID 3 ........................................................................ 206
• RAID 5 ........................................................................ 207
• RAID 6 ........................................................................ 207
• RAID x0....................................................................... 208
• JBOD........................................................................... 209
• Single Disk (Pass-Through Disk)...................................... 209
Summary of RAID Levels .................................................... 209

INTRODUCTION
12
1. Introduction
This section presents a brief overview of the ARC-8042-12 12bays
12Gb/s SAS to SAS desktop RAID subsystem.
1.1 Overview
The ARC-8042-12 SAS to SAS desktop RAID subsystem provides
12Gb/s SAS host interface link to the host board on the server
system. This RAID controller utilizes the same RAID kernel that
has been eld-proven in existing internal/external SATA/SAS RAID
controller products, allowing to bring stable and reliable SAS RAID
external subsystem. The ARC-8042-12 provides external storage
chassis capable of accommodating up to 12 12.0-Gb/s Serial-At-
tached SCSI (SAS) drives or 6.0-Gb/s Serial ATA (SATA) drives.
The ARC-8042-12 is designed to provide a truly innovative 12Gb/s
SAS host interfaces to address the needs of different cost-effective
RAID storage requirements. When properly congured, the RAID
subsystem can provide non-stop service with a high degree of fault
tolerance through the use of RAID technology and advanced array
management features. The 12Gb/s SAS interface supports both
12Gb/s SAS disk drives for data-intensive applications and 6Gb/s
SATA drives for low-cost bulk storage of reference data. The SAS
to 12Gb/s SAS RAID controllers attach directly to SATA/SAS mid-
planes and increase capacity using two additional HD SFF-8644
external connector.
Unparalleled Performance for 12Gb/s SAS
The ARC-8042-12 SAS to SAS desktop RAID subsystem raises the
standard to higher performance levels with several enhancements
including new high performance 1.2GHz dual core ROC processor,
a DDR3-1866 memory architecture and 12Gb/s SAS technology.
The ARC-8042-12 includes 2GB DDR3-1866 and ECC SDRAM. The
12Gb/s SAS is designed for backward compatibility with 6Gb/s and
3Gb/s SAS and SATA hard drives. Regardless of the drive speed,
12Gb/s SAS RAID controllers will provide maximum read/write per-
formance improvements for the most performancehungry database
and IT applications. The powerful RAID controller delivers high

INTRODUCTION
13
performance for NAS, supercomputing, near-line backup, security
systems, streaming and cloud computing applications.
Unsurpassed Data Availability
Designed and leveraged with Areca’s existing high performance
RAID solution, ARC-8042-12 provides superior levels performance
and enterprise level data protection for the most demanding next
generation server and storage environments. It supports the hard-
ware 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. With innovative
new RAID-on-Chip 12Gb/s SAS feature and support for SATA, SAS
and SSDs, the SAS RAID subsystems provides small- to mid-sized
enterprises with superior levels of RAID performance and scalability
for external storage. The subsystem supports traditional Lithium-
ion (Li-ion) battery backup module (BBM) to protect cached data
on RAID Controllers.
Easy RAID Management
Conguration and monitoring can be managed either through the
LCD control panel, RS232 port or LAN port. The rmware also
contains an embedded terminal emulation via the RS-232 port.
The rmware-embedded several available RAID managers include
internet browser, CLI, Telnet, API, SMTP and SNMP via a LAN
port. The ArcSAP Quick Manager can scan multiple RAID units in
the local and remote side and provide an effective management
interface for conguration, and monitoring Areca RAID controllers.

INTRODUCTION
14
1.2 Technical Specications
Controller Architecture
• Dual Core RAID-on-Chip (ROC) 1.2 GHz
• On-board 2GB DDR3-1866 ECC SDRAM
• NVRAM for RAID event log & transaction log
• Write-through or write-back cache support
• Redundant ash image for adapter availability
• Real time clock support
• Battery Backup Module ready (Optional)
RAID Features
• RAID level 0, 1, 10(1E), 3, 5, 6, 30, 50, 60, Single Disk or JBOD
• Multiple RAID 0 and RAID 10(1E) support (RAID 00 and RAID
100)
• Online array roaming
• Ofine RAID set
• Online RAID level/stripe size migration
• Online capacity expansion and RAID level migration simultane-
ously
• Online volume set growth
• Instant availability and background initialization
• Automatic drive failover/detection and rebuild using multiple
Global, Dedicated or Enclosure hot-spare drives
• Congurable stripe size up to 1MB
• Multiple pairs SSD/HDD disk clone function
• SSD automatic monitor clone support
• SED (Self-encrypting drives) function support
• Support native 4K and 512 byte sector devices
• Support HDD rmware update
• Disk scrubbing/ array verify scheduling for automatic repair of all
congured RAID sets
• Support intelligent power management to save energy and
extend service life
• Max 512 devices
• Max 128 LUNs (volume set)
Monitors/Notication
• LCD control panel for setup, alarm mute and conguration
• System status indication through LCD, LED and alarm buzzer
• SMTP support for email notication

INTRODUCTION
15
• SNMP support for remote manager
• Enclosure management ready (SES over in-band SAS)
Drive Interface
• Up to 512 devices using SAS expanders (two external SFF-8644
connectors: EXP.0 & EXP.1)
• Up to 12 x 12Gb/s internal ports
Host Interface
12Gb/s SAS-to-SAS
• 2 x SFF-8644 external connectors
• 8 x 12Gb/s SAS Ports (4-ports per SFF-8644 connector)
Drives
SAS hard drives
• Up to 12 2.5-inch or 3.5-inch SAS hot-plug hard drives (12.0
Gb/s) at speeds of 7.2K, 10K or 15K rpm
SATA hard drives
• Up to 12 2.5-inch or 3.5-inch SATA hot-plug hard drives (12.0
Gb/s) at speeds of 7.2K or 10K rpm
RAID Management
• Field-upgradeable rmware in ash ROM
• Firmware-embedded manager via RS-232 port
• API library for customer to write its own monitor utility
• Embedded browser-based RAID manager via built-in 10/100 Lan
port
• SAP monitor utility easily manage multiple RAID units in the
network
• Access terminal menu by telnet via a LAN port
Controller Back-Panel Connectors
I/O connectors
• 2 x SFF-8644 "Host In" connectors for connection to the host
• 2 x SFF-8644 "Expansion Out" connectors for expansion to an
additional JBOD enclosure
Management connectors
• 1 x 6-pin UART RJ-11 connector
• 1 x RJ-45 LAN connector (manufacture manager only)

INTRODUCTION
16
LED Indicators
Hard-drive carrier
• 1 blue single-color activity LED status indicator
• 1 dual-color fault/power LED status indicator
Controller board
• 2 x single-color LED status indicators for subsystem, one for
power-on and one for subsystem fault status
• 2 x single-color LED status indicators for each SAS host port,
one for SAS host port link and one for the activity status
• 2 x single-color LED status indicators for each SAS JBOD port,
one for SAS JBOD port link and one for the activity status
Power Supplies
• Dual 400W hot swap, N+1 redundant with PFC
• Supports 100–240VAC input at 47 and 63H z frequency
Physical
• Height 310 mm
• Width 206 mm
• Depth 290 mm
• Weight 20.8lbs/9.5 kg (without disk)
Environmental
Temperature:
• Operating 0° to 40°C
• Storage –40° to 60°C
Relative humidity:
• Operating 10% to 80% (non-condensing)
• Storage 5% to 95% (non-condensing)

INTRODUCTION
17
1.3 RAID subsystem View
The following diagram is the ARC-8042-12 desktop RAID subsys-
tem front view and rear view.
Front View Rear View
1. Disk Activity LED
2. Disk Fault/Link LED
3. LCD Panel with Keypad
4. SAS Host Port0 (CH0)*
5. SAS Host Port1 (CH1)*
6. SAS JBOD Port0 (EXP0)*
7. SAS JBOD Port1 (EXP1)*
8. RS232 Port
9. LAN Port
10. On/Off Switch
11. Power/Fault Status LED
12. System Fan
13. System Fan
14. Power Connector
* Note: This is the default conguration. You can use the CLI to set it
as a JBOD port or host port.

INTRODUCTION
18
1.4 Locations of the Subsystem Component
The following components come with LEDs that inform
ARC-8042-12 RAID storage managers about the operational status.
1.4.1 Drive Tray LED Indicators
Figure 1-1, 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.

INTRODUCTION
19
1.4.2 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 1-2.
Figure 1-2, LCD Panel LED
The following table provides a summary of the front panel 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.
1.5 RAID Subsystem Alarm
An audible alarm is activated if any of the fault conditions occur,
such as Voltage, Temperature, Fan or Power Supply. The “Alert
Beeper Setting” function on the RAID System Function is used to
disable or enable the RAID subsystem alarm tone generator. The
“Mute The Alert Beeper” function on the "RAID System Function"
is used to control the SAS RAID subsystem beeper. It turns the
beeper off temporarily. The beeper will still activate on the next
event.

INTRODUCTION
20
Figure 1-3. Module Daisy-chain
1.6 Expansion Connection
The SAS RAID subsystem is a device that contains one expander
port. Expander port may support being attached to SAS initiator
ports, SAS and/or SATA target ports, and to other expander ports.
The SAS RAID subsystem can connect up to 7 expander enclosures
to the host system. The maximum drive no. is 512 through this
RAID subsystem with 7 expander enclosures. Enclosures installed
with SAS disks or SATA disks can be included in the same daisy-
chain. The following gure shows how to connect the external Mini
SAS HD SFF-8644 cable from the 12Gb/s SAS RAID subsystem to
the external SAS JBOD. Daisy-chains longer than the limitation of
subsystems are not supported even if it may be workable.
The following table is the max no. of SAS RAID subsystem
supported:
Disks/Subsystem Expander Devices/Controller Volume
Max No. 128 8 512 128
Note:
1. Turn on the SAS RAID subsystem rst to make sure the
host adapter on the server recognizes the drives in the
subsystem.
2. Turn on the JBOD rst to make sure the SAS RAID sub-
system recognizes the drives in the JBOD.