Grass Valley K2 Lx0 RAID Storage User Manual

K2 Lx0 RAID Storage

Instruction Manual

071-8614-01
JULY 2008

Copyright Copyright © 2008 Grass Valley, Inc. All rights reserved. Printed in the United States of America.

Portions of software © 2000 – 2008, Microsoft Corporation. All rights reserved. This document
may not be copied in whole or in part, or otherwise reproduced except as specifically permitted
under U.S. copyright law, without the prior written consent of Grass Valley, Inc., P.O. Box
59900, Nevada City, California 95959-7900. This product may be covered by one or more U.S.
and foreign patents.

Disclaimer Product options and specifications subject to change without notice. The information in this

manual is furnished for informational use only, is subject to change without notice, and should
not be construed as a commitment by Grass Valley, Inc. Grass Valley, Inc. assumes no
responsibility or liability for any errors or inacc uracies that may appear in this publication.

U.S. Government
Restricted Rights
Legend

Trademarks and
Logos

Revision Status

Use, duplication, or disclosure by the United States Government is subject to restrictions as set
forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause
at DFARS 252.277-7013 or in subparagraph c(1) and (2) of the Commercial Computer
Software Restricted Rights clause at FAR 52.227-19, as applicable. Manufacturer is Grass
Valley, Inc., P.O. Box 59900, Nevada City, California 95959-7900 U.S.A.

Grass Valley, K2, Aurora, Infinity, Turbo, M-Series, Profile, Profile XP, NetCentral,
NewsBrowse, NewsEdit, NewsQ, NewsShare, Ne wsQ Pro, and Media Manager are either
registered trademarks or trademarks of Grass Valley, Inc. in the United States and/or other
countries. Grass Valley, Inc. products are covered by U.S. and foreign patents, issued and
pending. Additional information regarding Grass Valley, Inc. trademarks and other proprietary
rights may be found at www.thomsongrassvalley.com.

Other trademarks and logos used in this document are either registered trademarks or
trademarks of the manufacturers or vendors of the associated products, such as Microsoft®
Windows® operating system, Windows Media® play er, Internet Explorer® internet browser,
and SQL Server™. QuickTime and the QuickTime logo are trademarks or registered
trademarks of Apple Computer, Inc., used under license therefrom.

Rev Date Description

September 7,
2007

Initial release of the K2 Lx0 RAID Instruction Manual —
071-8614-00 for K2 Software Version 3.2.5

July 31, 2008 Update rack install procedure — 071-8614-01

2 K2 Lx0 RAID Instruction Manual July 31, 2008

Contents

Safety Summaries..............................................................................................5

Preface..................................................................................................................9

About this manual......................................... ...... ..... .................................. ...... ..... ...9

Using the K2 Documentation Set .......................................................................9

K2 Storage System Release Notes...............................................................10

K2 Storage System Cabling Guide................................................................10

K2 Media Client Quick Start Guides..............................................................10

Documentation CD-ROM........................................................... ...... ...... ..... ...10

How this manual is organized.............................................................................10

Terminology used in this manual........................................................................11

Getting more information.........................................................................................11

On-line Help Systems.........................................................................................11

Thomson Grass Valley Web Site........................................................................12

Grass Valley Product Support.................................................................................13

Chapter 1 About the K2 Lx0 RAID

K2 Lx0 RAID features..............................................................................................15

K2 Lx0 RAID components.......................................................................................16

Chassis...............................................................................................................17

K2 Lx0 RAID Circuit board modules...................................................................17

K2 Lx0 RAID Storage Chassis circuit board modules ...................................17

K2 Lx0 Expansion RAID Expansion Chassis circuit board modules ............18

Power supplies...................................................................................................19

Disk modules......................................................................................................19

SAS disk drive ...............................................................................................20

SATA disk drive.............................................................................................20

Chapter 2 K2 Lx0 RAID Installation Information

Installation requirements .........................................................................................21

Site requirements ...............................................................................................21

Power.............................................................................................................21

Cooling...........................................................................................................21

Cabling requirements.........................................................................................21

Binding disk modules into groups.......................................................................22

Installing a K2 Lx0 RAID in an equipment rack.......................................................22

Unpacking the chassis............................. .................................. ..... ....................22

Installing the rack mounts...................................................................................22

Inserting the K2 Lx0 RAID chassis in the rack ...................................................24

K2 Lx0 RAID power-up and initialization.................................................................28

Connecting electrical cables........................................... ..... ...... ..... ....................28

Powering-up the K2 Lx0 RAID system...............................................................28

K2 Lx0 RAID power-down.......................................................................................29

Battery Backup........................................................................................................30

Chapter 3 Servicing the K2 Lx0 RAID

Maintenance procedures using Grass Valley Storage Utility ..................................31

Monitoring K2 Lx0 External RAID status using NetCentral.....................................31

Interpreting front panel LEDs..............................................................................32

Primary and Expansion RAID chassis ..........................................................33

Interpreting disk module LEDs............................................................ ....................34

Interpreting controller status LEDs..........................................................................35

Interpreting expansion adap ter sta tus LEDs........................................................ ...38

Interpreting power supply status LEDs....................................................................39

Moving disk modules...............................................................................................39

July 31, 2008 K2 Lx0 RAID Instruction Manual 3

Contents

Removing and installing disk modules....................................................................40

Removing a disk module.................................................................................... 40

Installing disk module......................................................................................... 41

Replacing a RAID controller or expansion adapter.................................................43

Removing a RAID controller or expansion adapter............................................43

Installing a RAID controller or expansion adapter..............................................44

Replacing a power supply....................................................................................... 44

Replacing a battery................................................................................................. 45

Adding expansion ports........................................................................................... 46

Chapter 4 K2 Lx0 RAID Technical Specifications and Operating Limits

Data handling specifications ...................................................................................49

AC power requirements .......................................................................................... 49

Size and weight.......................................................................................................50

Cable lengths.......................................................................................................... 50

Environmental limits................................................................................................ 50

Life expectancies of components............................................................................ 50

Glossary...............................................................................................................51

Index...................................................................................................................... 55

4 K2 Lx0 RAID Instruction Manual July 31, 2008

Safety Summaries

General Safety Summary

Review the following saf ety precautions to avoid inj ury and prevent damage
to this product or any products connected to it.

Only qualified personnel should perform service procedures.

While using this pr oduct, you may need to ac cess oth er part s of t he sy stem .
Read the General Safety summary in other system manuals for warnings and
cautions related to operating the system.

Injury Precautions

Use Proper Power Cord

To avoid fire hazard, use only the power cord specified for this product.

Ground the Product

This product is grounded through the grounding conductor of the power
cord. To avoid electric shock, the grounding conductor must be connected
to earth ground. Before maki ng connections to t he input or outpu t terminals
of the product, ensure that the product is properly grounded.

Do Not Operate Without Covers

To avoid electric shock or fire hazard, do not operate this product with
covers or panels removed.

Do Not operate in Wet/Damp Conditions

To avoid electric shock, do not operate this product in wet or damp
conditions.

Do Not Operate in an Explosive Atmosphere

To avoid injury or fire hazard, do not operate this product in an explosive
atmosphere.

Avoid Exposed Circuitry

To avoid injury, remove jewelr y such as rings, watches, and other metall ic
objects. Do not touch ex posed conn ectio ns and components when power is
present.

Product Damage Precautions

Use Proper Power Source

Do not operate this product f rom a power sour ce that applie s more than the
voltage specified.

Provide Proper Ventilation

To prevent product overheating, provide proper ventilation.

July 31, 2008 K2 Lx0 RAID Instruction Manual 5

Safety Summaries

!

!

!

Do Not Operate With Suspected Failures

If you suspect there is da mage to this product, have it in spected by q ualifie d
service personnel.

Battery Replacement

To avoid damage, replace only with the same or equivalent type
recommended by the circuit board manufacturer. Dispose of used battery
according to the circuit board manufacturer’s instructions.

Safety Terms and Symbols

Terms in This Manual

These terms may appear in this manual:
WARNING: Warning statements identify conditions or practices that can

result in personal injury or loss of life.
CAUTION: Caution statements identify conditions or practices that may

result in damage to equipment or other property, or which may cause
equipment crucial to your business environment to become temporarily
non-operational.

Terms on the Product

These terms may appear on the product:

DANGER indicates a personal inj ury hazard immedi ately access ible as one
reads the ma rking.

WARNING indicates a personal injury hazard not immediately accessible
as you read the marking.

CAUTION indicates a hazard to property including the product.

Symbols on the Product

The following symbols may appear on the product:
DANGER high voltage

Protective ground (earth) terminal

ATTENTION – refer to manual

6 K2 Lx0 RAID Instruction Manual July 31, 2008

Service Safety Summary

!

WARNING: The service instructions in this manual are intended for
use by qualified service personnel only. To avoid personal injury, do
not perform any servicing unless you are qualified t o do so. Refer to al l
safety summaries before performing service.

Do Not Service Alone

Do not perform interna l service or adj ustment of this product unless ano ther
person capable of rendering first aid and resuscitation is present.

Disconnect Power

To avoid electric shock, discon nect the main power by means of the power
cord or, if provided, the power switch.

Use Care When Servicing With Power On

Dangerous voltages or cur rents may exist in t his product. Disconnec t power
and remove battery (if applicable) before removing protective panels,
soldering, or replacing components.

To avoid electric shock, do not touch exposed connections.

Certifications and Compliances

FCC Emission

Control

Canadian EMC

Notice of

Compliance

This equipment has been tested and found to comply with the limits for a
Class A 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 use d in accordance with th e instructio n manual, may cause
harmful interfere nce to radio communication s. Operation of thi s equipment
in a residential area is likely to cause harmful interference in which case the
user will be required to cor rect the interference at his own expense. Changes
or modifications not expressly approved by Grass Valley can affect
emission compliance and could void the user’s authority to operate this
equipment.

This digital apparatus does not exceed the Class A limits for radio noise
emissions from digital apparatus set out in the Radio Interference
Regulations of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques
dépassant les limites applicables aux appareils numériques de la classe A
préscrites dans le Règlement sur le brouillage radioélectrique édicté par le
ministère des Communications du Canada.

This product complies with Class A (E4 environment). In a domestic
environment this product may cause radio interference in which case the
user may be required to take adequate measures.

July 31, 2008 K2 Lx0 RAID Instruction Manual 7

Safety Summaries

FCC Emission

Limits

This device complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accep t any interf erence rece ived,
including interference that may cause undesirable operation.

Laser Compliance

Laser Safety

Requirements

Laser Safety Laser safety in the United States is regulated by the Center for Devices and

The device used in thi s product is a Class 1 cert ified laser product. Op erating
this product outsi de specifications or altering its original design may result
in hazardous radiati on exposure, and may be consi dered an act of modifying
or new manufacturing o f a laser product under U.S. regula tions contained i n
21CFR Chapter 1, subchapter J or CENELEC regulations in HD 482 S1.
People performing such an act are re quired by law to recertify and re identify
this product in accordance with provisions of 21CFR subchapter J for
distribution within th e U. S.A., and in ac cor danc e wit h CENELEC HD 482
S1 for distribution within countries using the IEC 825 standard.

Radiological Health ( CDRH). The la ser sa fety regulations are publ is hed i n
the “Laser Product Performance Standard,” Code of Federal Regulation
(CFR), Title 21, Subchapter J.

The International Electrotechnical Commission (IEC) Standard 825,
“Radiation of Laser Produ cts, Equipmen t Classific ation, Requi rements and
User’s Guide,” govern s laser products outside the United States. Europe an d
member nations of the European Free Trade Association fall under the
jurisdiction of the Comité Européen de Normalization Electrotechnique
(CENELEC).

Disposing of your used product

In the European Union — EU-wide legislation as implemented in each
member state requires that used electrical and electronic products carrying
the mark at left must be disposed of separately from normal household
waste. The equipment with this mark may include electrical accessories
(e.g. memory cards). When you dispos e of such produ cts, pleas e follow the
agreements made between yo u and Grass Valley. Th e mark on the elect rical
and electronic produc ts only applies to the c urrent European Union Member
States. This statement is in compliance with European Commission
Directive 2002/96/EC Waste Electrical and Electronic Equipment.

Outside the European Union — If you wish to dispose o f used electric al and
electronic produc ts outside of the European Union , please contact your loc al
authority and ask for the correct method of disposal.

8 K2 Lx0 RAID Instruction Manual July 31, 2008

Preface

About this manual

The K2 Lx0 RAID Storage Chassis provides RAID protected storage for the K2
Storage System. If you are res ponsible for installi ng and servicing K2 Lx0 RAID, you
should read this manual.

Using the K2 Documentation Set

The following illustration shows the recommended order in which to reference the
documentation.

Path for the installer of K2 Media Client models with stand-alone storage

Grass Valley

K2 Manual

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K2 Media Client
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The latest information about the
hardware and software shipped
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K2 Media Client.

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Quick Start Guide

The essential steps for installing
the K2 Media Client. Different
models each have their own
version, packaged with the K2
Media Client.

K2 Media Client
System Guide*

Specifications and
instructions for
system settings.

Documentation

CD

Path for the installer of the K2 Storage System with connected K2 Media Clients

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Release Notes

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the system.

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K2 Media Client
Release Notes

The latest information
about the hardware and
software shipped with
the system.

K2 Storage System
Cabling Guide**

Diagrams for
cabling K2 Storage
System devices.

Grass Valley

K2 Manual

Documentation

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K2 Media Client
User Manual*

Information for using the user
interface to record, play and
manage clips and to configure
channels.

K2 Storage System
Instruction Manual*

Instructions to
install/configure K2
Storage (SAN), with
K2 Media Client, K2
Media Server.

Find the K2 Documentation CD packaged with K2 Media

*

Clients and with K2 RAID Storage devices, primary chassis.

Find the Storage Release Notes and Cabling Guide

**

packaged with K2 RAID Storage devices, primary chassis.

K2 Media Client
System Guide*

Specifications and
instructions for
system settings.

Other Manuals*

Including:

-

Quick Start Guide

-

User Manual

- Service Manual

- RAID manuals

Documentation descriptions

Use the following descriptions to choose the other documentation you need as you
install, ope rate, and maintain your system.

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July 31, 2008 K2 Lx0 RAID Instruction Manual 9

Preface

K2 Storage System Release Notes

The release notes contain the latest information about the software shipped on your
system. The informat ion in this document includes software upgrade instructions,
software specifi cations and requi rements, feature changes from the pre vious releas es,
and any known problems. Because release notes contain the latest information, they
are printed out rather tha n included in the Documentation CD-ROM . You can find the
release notes packaged with the RAID storage chassis.

K2 Storage System Cabling Guide

The cabling guides provide diagrams for storage system cabling and external
configuration, su ch as setting addre sses on RAID devices. There is a cabling g uide for
each pre-defined level of K2 Storage System. Each cabling guide covers both
redundant and non-redund ant systems. You ca n find the cabl ing guide packag ed with
the primary RAID storage chassis.

K2 Media Client Quick Start Guides

The Quick Start Guides provides step-by-step installation instructions for basic
installation and operation of the K2 Media Client, including recording and playing
clips. You can find the Quick Start Guide for your par ticular model packaged with the
K2 Media Client.

Documentation CD-ROM

Except for the release notes and Quick Start guide, the full set of support
documentation, including this manual, is available on the Documentation CD-ROM
that you receive with your K2 Media Client. You can find the Documentation
CD-ROM packaged with the RAID storage chassis.

The Documentation CD-ROM includes the following:

K2 Storage System Instruction Manual — Contains installation, configuration, and

•
maintenance procedures for shared storage options.

•

RAID Instruction Manuals — There is an Instruction Manual for the RAID storage

device that can be a part of a K2 Media Client. This manual contains procedures
for configuring and servicing the device.

•

K2 Media Client System Guide — Contains the product specifications and

step-by-step instructions for modifying system settings. Includ es instruc tions for
adding a K2 Media Client to the K2 Storage System.

•

K2 Media Client User Manual — Describes the K2 Media Client and provides

instructions for configuring and operating the product.

•

K2 Media Client Service Manual — Contains information on servicing and

maintenance.

How this manual is organized

The K2 Lx0 RAID Stor age Instruc tion Manual is organized around th e tasks y ou’ll be
performing to install and service your K2 RAID External Storage System. You can
see this reflected in the chapter titles chosen for this manual. The following identifies
and describes the chapters included in this manual:

10 K2 Lx0 RAID Instruction Manual July 31, 2008

Chapter 1, About the K2 Lx0 RAID

Introduces the K2 Lx0 RAID Storage. You can r ead t his chapter to get familiar with
the K2 Lx0 RAID external storage key features and components.

Chapter 2, K2 Lx0 RAID Installa tion Inform ation

Describes how to install a K2 Lx0 RAID Storage and K2 Lx0 Expansion Chassis,
including rack mounting. Refer to the K2 Storage System Instruction Manual for
connection and configuration information.

Chapter 3, Servicing the K2 Lx0 RAID

Describes how to replace FRUs, such as disk modules, and add disk modules and
redundant FRUs.

Chapter 4, K2 Lx0 RAID Technical Specifications and Operating Limits

This appendix consists of electrical and environmental specifications.

Glossary

The Glossary explains terms used throughout this manual.

Terminology used in this manual

In order to avoid confusion between the storage types, the following terms will be
used consistently throughout the K2 documentation:

Terminology used in this manual

Internal storage — K2 Media Client models with internal storage access their ow n
internal media storage drives, as a “stand-alone” system.

Direct-connect storage — K2 Media Client models with direct-connected (i.e. not
shared) storage ac cess their own external media stora ge driv es that are contained in a
Lx0 RAID chassis, and are also considered stand-alone systems.

Shared storage — K2 Media Client models with shared storage access RAID
protected media storage drives that are part of a K2 Storage System (SAN). The K2
Storage System incorporates one or more RAID chassis, such as K2 Lx0 RAID.

K2 Storage System — specifically refe rs to the shared K2 Storage System (SAN).
Stand-alone K2 Media Client — refe rs to K2 Media Clie nts with int ernal stor age or

direct-connect st ora ge.

Getting more information

Product information is readily available at the following sources:

On-line Help Sy st e m s

K2 Media Client Help — You can access the on-line help through the AppCenter user

interface as follows:

• In the menu bar select
drop-down menu.

Help, then choose AppCenter Help Topics from the

NetCentral Help — From the NetCentral interface access on-line help as follows:

• For general help with NetCentral manager, select

• For help specific to monitoring K2 Media Client system devices, select

Device Providers

July 31, 2008 K2 Lx0 RAID Instruction Manual 11

and then select the monitored device.

Help | NetCentral Help Topics.

Help |

Preface

Thomson Grass Valley Web Site

This public Web site contains all the latest manuals and documentation, and
additional support information. Use the following URL.

http://www.thomsongrassvalley.com.

12 K2 Lx0 RAID Instruction Manual July 31, 2008

Grass Valley Product Support

T o get technica l assistance, che ck on the status of a question, or to repo rt new issue, contac t
Grass Valley Product Support via e-mail, the We b, or by phone or fax.

Web Technical Support

To access support infor mation on the Web, v isit the pro duct support Web p age on the
Grass Valley Web site. Yo u ca n down loa d software or find sol ut ion s t o pr obl ems b y
searching our Frequently Asked Questions (FAQ) database.

World Wide Web: http://www.thomsongrassvalley.com/support/
Technical Support E-mail Address: [e-mail].

Phone Support

Use the following information to contact product support by phone during business
hours. Afterhours phone support is available for warranty and contract customers.

Grass Valley Product Support

International
(France)

International
(United States,
Canada)

Hong Kong,
Taiwan, Korea,
Macau

Australia, New
Zealand

Central, South
America

China [phone] Netherlands [phone]
Belgium [phone] Northern Europe [phone]
Japan [phone] Singapore [phone]
Malaysia [phone] Spain [phone]
Middle East [phone] UK, Ireland, Israel [phone]

[phone]
[phone]

[phone]
[phone]

[phone] Indian

[phone] Germany, Austria,

[phone] Near East, Africa [phone]

Authorized Support Representative

Italy [phone]

[phone]

Belarus, Russia,
Tadzikistan,
Ukraine,
Uzbekistan

Subcontinent

Eastern Europe

[phone]
[phone]

[phone]
[phone]

[phone]

A local authorized support represent ative may be availabl e in your countr y. To locate the
support representat ive for your count ry, visit the pro duct support Web page on the Grass
Valley Web site.

July 31, 2008 K2 Lx0 RAID Instruction Manual 13

Preface

14 K2 Lx0 RAID Instruction Manual July 31, 2008

Chapter 1

Condor RAID
Chassis

Condor RAID
Expansion
Chassis

BBU IN MODEM

FLT/LNK

HPE
FLT

A/L

BACKUP

ACT/LNK

LNK/ACT

FLT

HP

5 4 3 2

RDY

LAN

BAT

MNT

ACS

MC

DP1 DP0

HP

1 0

BBU IN MODEM

FLT/LNK

HPE
FLT

A/L

BACKUP

ACT/LNK

LNK/ACT

FLT

HP

5 4 3 2

RDY

LAN

BAT

MNT

ACS

MC

DP1 DP0

HP

1 0

FLT/LNK

FLT RDY

DP-OUT

PS

FLT CLR

DP-IN

FLT/LNK

FLT RDY

DP-OUT

PS

FLT CLR

DP-IN

About the K2 Lx0 RAID

This chapter introduces the K2 Lx0 RAID Storage. Topics include:

• “K2 Lx0 RAID features” on page 15

• “K2 Lx0 RAID components” on page 16

• “K2 Lx0 RAID components” on page 16

K2 Lx0 RAID features

The K2 Lx0 RAID is a high performa nce, hig h availabili ty mass st orage syst em used
in K2 Lx0 and K2 Lx0 Expansion K2 Storage Systems. The K2 Lx0 chassis 4 Gb/s
host interface supports industry-standard technology.

The K2 Lx0 RAID has a minimum of two host ports per controller. Each chassis is
equipped with two power supplies. Individual high-speed SAS links connect drives.

Depending on your configuration, the K2 Lx0 RAID chassis contains:

• Two or six host ports

• Up to 12 SAS or SATA disk drives

• One or two hardware RAID Controllers in a 2U high rack-mountable chassis

July 31, 2008 K2 Lx0 RAID Instruction Manual 15

Chapter 1 About the K2 Lx0 RAID

The K2 Lx0 RAID Expansion Chassis provides additional storage capacity. It
contains:

• Two Expansion Adapters

• Up to eleven K2 Lx0 RAID Expansion Chassis can be connected to a single K2
Lx0 RAID chassis

• A single disk-array storage system with up to 144 drives

K2 Lx0 RAID components

The K2 Lx0 RAID components are:

• One 2U high rack-mountable chassis

• One or two (K2 Lx0 RAID re dundant) RAID controller s or two expansion ad apters
(Expansion chassis)

• As many as twelve SAS 73GB or 300GB (15,000 rpm) or SATA 500 GB or 750
GB (7,200 rpm) disk drives per chassis

• Two RAID chassis power supplies

All configurations have SNMP ports, sl ots for prima ry and secondar y controllers, an d
chassis with redundant power. Any unoccupied sl ot (RAID controller or disk mod ule)
has a filler module to maintain air flow and compliance with electromagnetic
interferen ce (EMI) standards.

The RAID controllers, expansion adapters, disk drives and power supplies are
hot-swappable field replaceable units (FRUs), which means you can add or replace
them while the K2 Lx0 RAID is powered up.

An optional second RAID controller module in the K2 Lx0 RAID allows for
continued access to the K2 Lx0 RAID if the primary RAID controller fails. Refer to
the K2 Storage System Instruc tion Manu al for detaile d conn ection and conf igura tion
instructions.

16 K2 Lx0 RAID Instruction Manual July 31, 2008

The following figure shows the RAID Storage Chassis components. Details on each

HOT

UNIT LABEL

HOT

UNIT LABEL

Controller 1
(or Expansion Adapter 1)

Controller 0
(or Expansion Adapter 0)

Power Supply 0

Power Supply 1

Chassis

component follow the figure.

Chassis

Chassis

K2 Lx0 RAID Circuit board modules

K2 Lx0 RAID Storage Chassis circuit board modules

July 31, 2008 K2 Lx0 RAID Instruction Manual 17

NOTE: Every K2 Lx0 RAID chassis controller includes a backup bat tery so tha t if
electrical power is lost, data stored in cache memory will be saved.

The chassi s is a sheet-metal housing that contains chas sis slots for the RAID
controllers or expansion adapters, disk drives, power supplies, and the LAN card.

There are two circuit board modules used: the RAID controller module and the
expansion adapter. The RAID controller module is in the primary RAID chassis. It
manages the disk drives and provide s an int er fa ce to th e K2 Media Serv er sys te m or
switch. The expansion adapter i s in an Expans ion chass is. It manag es the d isk drive s,
in conjunction with the conn ected RAID con trol ler and pr ovides an SAS interfac e to
the primary chassis.

The K2 Lx0 RAID includes one or two RAID controller modules. This provides
redundant host interface ports.