Eternus DX80 S2, DX90 S2 User Manual

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Preface

Fujitsu would like to thank you for purchasing our ETERNUS DX80 S2/DX90 S2 Disk storage system. The ETERNUS DX80 S2/DX90 S2 Disk storage system is designed to be connected to Fujitsu (PRIMEQUEST or PRIMERGY) or non-Fujitsu servers. This guide describes the environmental requirements that are necessary to install and use the ETERNUS DX80 S2/DX90 S2 Disk storage system. This guide is intended for use of ETERNUS DX80 S2/DX90 S2 Disk storage system in regions other than Japan. Please carefully review the information outlined in this manual.

Third Edition

September 2011

Microsoft, Windows, Windows Server, and Internet Explorer are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. Mozilla, Firefox, and the Mozilla and Firefox logos are trademarks or registered trademarks of the Mozilla Foundation in the United States and other countries. The company names, product names and service names mentioned in this document are registered trademarks or trademarks of their respective companies.

ETERNUS DX80 S2/DX90 S2 Disk storage system User’s Guide -Site Planning-

Organization

This document is composed of the following four chapters:

● Chapter 1 Hardware Configurations

This chapter describes the main components and the relative optional products that are installed in the ETERNUS DX80 S2/DX90 S2 Disk storage system.

● Chapter 2 ETERNUS DX Disk Storage System Installation

This chapter describes the installation specifications, the installation environment, and the power requirements.

● Chapter 3 Connections

This chapter describes the configuration for each interface to connect to the ETERNUS DX80 S2/DX90 S2 Disk storage system.

About this Manual

● Chapter 4 Rack and Optional Product Installation

This chapter describes the requirements for rack installation. This chapter also describes the standard installation rules (installation locations and installation order) of the optional products before shipment from the factory when the optional products are purchased with the ETERNUS DX80 S2/DX90 S2 Disk storage system at the same time.

Naming Conventions

■ Abbreviations used in this manual

• "ETERNUS DX Disk storage system" refers to the ETERNUS DX80 S2/DX90 S2 Disk

storage system.

• "CA" refers to the host interface module used in the ETERNUS DX Disk storage systems to

connect to the server.

• "Host Bus Adapter (HBA)" refers to the interface module normally used by the server to

connect to the ETERNUS DX Disk storage systems. A "FC card", "LAN card", "Network Interface Card (NIC)", "Converged Network Adaptor (CNA)", or "SAS card" may be used instead, depending on the server and interface.

• Trademark symbols such as ™ and ® are omitted in this document.

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About this Manual

CAUTION

Warning Level Indicator

Warning Type Indicator

Warning Details

To avoid damaging the ETERNUS DX Disk storage system, pay attention to the following points when cleaning the ETERNUS DX Disk storage system:

- Make sure to disconnect the power when cleaning.

- Be careful that no liquid seeps into the ETERNUS DX Disk storage system when using cleaners, etc.

- Do not use alcohol or other solvents to clean the ETERNUS DX Disk storage system.

Warning Layout Ribbon

Example Warning

Warning Notations

Warning signs are shown throughout this manual in order to prevent injury to the user and/or material damage. These signs are composed of a symbol and a message describing the recommended level of caution. The following explains the symbol, its level of caution, and its meaning as used in this manual.

This symbol indicates the possibility of minor or moderate personal injury, as well as damage to the ETERNUS DX Disk storage system and/or to other users and their property, if the ETERNUS DX Disk storage system is not used properly.

How Warnings are Presented in this Manual

A message is written beside the symbol indicating the caution level. This message is marked with a vertical ribbon in the left margin, to distinguish this warning from ordinary descriptions. An example is shown here.

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Chapter 1 Hardware Configurations ......................................................11

1.1 Controller Enclosure ......................................................................................... 11

1.1.1 Controllers ................................................................................................................................. 15

1.1.2 Power Supply Units ................................................................................................................... 17

1.2 Drive Enclosures .............................................................................................. 17

1.2.1 I/O Modules ............................................................................................................................... 21

1.2.2 Power Supply Units ................................................................................................................... 22

1.3 Enclosure Connection Path .............................................................................. 22

1.4 Drives ............................................................................................................... 24

1.4.1 2.5" Drives ................................................................................................................................. 24

1.4.2 3.5" Drives ................................................................................................................................. 24

1.5 Power Distribution Units (Only for Regions Other than EMEA&I) .................... 25

Chapter 2 ETERNUS DX Disk Storage System Installation .................28

2.1 Installation Specifications ................................................................................. 28

2.1.1 ETERNUS DX80 S2 .................................................................................................................. 28

2.1.2 ETERNUS DX90 S2 .................................................................................................................. 30

2.2 Package Size ................................................................................................... 32

2.3 Installation Area ............................................................................................... 33

2.4 Installation Environment ................................................................................... 34

2.4.1 Air Conditioning ......................................................................................................................... 34

2.4.2 Earthquake Resistance ............................................................................................................. 34

2.4.3 Load Bearing Capacity for Floors .............................................................................................. 34

2.5 Outlet/Socket Specifications ............................................................................ 35

2.5.1 Specifications for Optional Power Supply Products .................................................................. 35

2.5.2 Required Number of Outlets/Sockets ........................................................................................37

2.6 Circuit Protectors .............................................................................................. 39

Chapter 3 Connections............................................................................44

3.1 Host Connections ............................................................................................. 44

3.1.1 Host Interfaces .......................................................................................................................... 44

3.1.2 Host Connection Path ................................................................................................................ 45

3.2 Remote Connections ........................................................................................ 49

3.2.1 Remote Interfaces ..................................................................................................................... 50

3.2.2 Connectable Models .................................................................................................................. 51

3.3 LAN Connection ............................................................................................... 52

3.4 Power Supply Connection ................................................................................ 53

3.4.1 Input Power Supply Lines .......................................................................................................... 53

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Table of Contents

3.4.2 UPS Connection ........................................................................................................................ 55

Chapter 4 Rack and Optional Product Installation ...............................57

4.1 Rack Installation Requirements ....................................................................... 57

4.1.1 Placement in the Rack ............................................................................................................... 57

4.1.2 Cable Connection ...................................................................................................................... 58

4.2 Installable Racks .............................................................................................. 60

4.2.1 Fujitsu Racks ............................................................................................................................. 60

4.2.2 Non-Fujitsu Racks ..................................................................................................................... 61

4.3 Installation Guide for Optional Products .......................................................... 62

4.3.1 Hot Spares ................................................................................................................................. 62

4.4 Standard Installation Rules Before Shipment

(Only for Regions Other than EMEA&I) ........................................................... 63

4.4.1 Host Interfaces .......................................................................................................................... 63

4.4.2 Drive Enclosures ....................................................................................................................... 64

4.4.3 Drives ........................................................................................................................................ 65

4.4.4 Drive Installation Examples ....................................................................................................... 68

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List of Figures

Figure 1.1 Front view of a 2.5" type controller enclosure............................................................................ 11

Figure 1.2 Rear view of a 2.5" type controller enclosure (single-controller type)........................................ 12

Figure 1.3 Rear view of a 2.5" type controller enclosure (dual-controller type) .......................................... 12

Figure 1.4 Top view of a 2.5" type controller enclosure.............................................................................. 13

Figure 1.5 Side view of a 2.5" type controller enclosure............................................................................. 13

Figure 1.6 Front view of a 3.5" type controller enclosure............................................................................ 13

Figure 1.7 Rear view of a 3.5" type controller enclosure (single-controller type)........................................ 14

Figure 1.8 Rear view of a 3.5" type controller enclosure (dual-controller type) .......................................... 14

Figure 1.9 Top view of a 3.5" type controller enclosure.............................................................................. 15

Figure 1.10 Side view of a 3.5" type controller enclosure............................................................................. 15

Figure 1.11 Front view of a 2.5" type drive enclosure................................................................................... 18

Figure 1.12 Rear view of a drive enclosure (single-IOM type)...................................................................... 18

Figure 1.13 Rear view of a drive enclosure (dual-IOM type) ........................................................................ 18

Figure 1.14 Top view of a 2.5" type drive enclosure..................................................................................... 19

Figure 1.15 Side view of a 2.5" type drive enclosure.................................................................................... 19

Figure 1.16 Front view of a 3.5" type drive enclosure................................................................................... 19

Figure 1.17 Rear view of a drive enclosure (single-IOM type)...................................................................... 20

Figure 1.18 Rear view of a drive enclosure (dual-IOM type) ........................................................................ 20

Figure 1.19 Top view of a 3.5" type drive enclosure..................................................................................... 21

Figure 1.20 Side view of a 3.5" type drive enclosure.................................................................................... 21

Figure 1.21 Enclosure connection path (dual-controller type) ...................................................................... 22

Figure 1.22 Enclosure connection path (single-controller type).................................................................... 23

Figure 1.23 Power distribution unit (AC200-240V, 1U, Max 2 enclosures connection) ................................ 25

Figure 1.24 Power distribution unit (AC200-240V, 2U, Max 6 enclosures connection) ................................ 26

Figure 1.25 Power distribution unit (AC200-240V, 2U, Max 8 enclosures connection) ................................ 26

Figure 2.1 Installation area and service area.............................................................................................. 33

Figure 2.2 Power distribution unit (1U) ....................................................................................................... 38

Figure 2.3 Power distribution unit (2U) ....................................................................................................... 38

Figure 2.4 Breaking characteristics of distribution board circuit protectors ................................................ 40

Figure 2.5 Example of a power supply connection using a power distribution unit (1U) ............................ 41

Figure 2.6 Example of a power supply connection using a power distribution unit (2U) ............................ 42

Figure 2.7 Example of a power supply connection without power distribution units................................... 43

Figure 3.1 Single path connection (direct connection)................................................................................ 46

Figure 3.2 Single path connection (switch connection) .............................................................................. 46

Figure 3.3 Multipath connection (direct connection) ................................................................................... 47

Figure 3.4 Multipath connection (switch connection).................................................................................. 47

Figure 3.5 Connection that satisfies the system requirements (for availability) .......................................... 48

Figure 3.6 Connection that satisfies the system requirements (for enhanced performance) ..................... 48

Figure 3.7 Example of non-supported connection configuration (when multiple types of remote interfaces

are installed in the same ETERNUS DX Disk storage system) ................................................. 49

Figure 3.8 Example of supported connection configuration (when multiple types of remote interfaces

are installed in the same ETERNUS DX Disk storage system) ................................................. 49

Figure 3.9 FC connection for remote copy (redundant path)...................................................................... 50

Figure 3.10 FC connection for remote copy (using lines) ............................................................................. 50

Figure 3.11 iSCSI connection for remote copy (using lines)......................................................................... 51

Figure 3.12 Example of a LAN connection ................................................................................................... 52

Figure 3.13 Dual-line power supply when connecting to power sockets ...................................................... 53

Figure 3.14 Dual-line power supply when connecting to UPS units ............................................................. 54

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List of Figures

Figure 3.15 Single-line power supply when connecting to power sockets.................................................... 54

Figure 3.16 Single-line power supply when connecting to a UPS unit ......................................................... 54

Figure 3.17 Single-line power supply when connecting to a power socket and a UPS unit ......................... 54

Figure 4.1 AC cable connection.................................................................................................................. 58

Figure 4.2 QSFP cable connection (single-controller type) ........................................................................ 59

Figure 4.3 QSFP cable connection (dual-controller type)........................................................................... 60

Figure 4.4 Unit installation area .................................................................................................................. 61

Figure 4.5 Installation diagram for a host interface adapter (single-controller type)................................... 63

Figure 4.6 Installation diagram for host interface adapters (dual-controller type)....................................... 64

Figure 4.7 Installation diagram for 2.5" drives ............................................................................................ 66

Figure 4.8 Installation diagram for 3.5" drives ............................................................................................ 67

Figure 4.9 Drive installation example at shipment (2.5" type controller enclosure) .................................... 68

Figure 4.10 Drive installation example at shipment (3.5" type controller enclosure) .................................... 69

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List of Tables

Table 1.1 Host interface adapter specifications......................................................................................... 16

Table 1.2 Drive interface port specifications.............................................................................................. 16

Table 1.3 LAN port specifications .............................................................................................................. 17

Table 1.4 Drive interface port specifications.............................................................................................. 21

Table 1.5 2.5" drive specifications ............................................................................................................. 24

Table 1.6 3.5" drive specifications ............................................................................................................. 24

Table 1.7 Power distribution unit (AC200-240V, 1U, Max 2 enclosures connection) and

provided AC cable specifications............................................................................................... 25

Table 1.8 Power distribution unit (AC200-240V, 2U, Max 6 enclosures connection) and

provided AC cable specifications............................................................................................... 26

Table 1.9 Power distribution unit (AC200-240V, 2U, Max 8 enclosures connection) and

provided AC cable specifications............................................................................................... 27

Table 2.1 ETERNUS DX80 S2 installation specifications ......................................................................... 28

Table 2.2 ETERNUS DX90 S2 installation specifications ......................................................................... 30

Table 2.3 Package size (for regions other than EMEA&I) ......................................................................... 32

Table 2.4 Specifications for power cords supplied with the ETERNUS DX Disk storage system

(for the EMEA&I region) ............................................................................................................ 35

Table 2.5 Specifications for power cords supplied with the ETERNUS DX Disk storage system

(for regions other than EMEA&I) ............................................................................................... 36

Table 2.6 Specifications for power distribution unit for DX80 S2/DX90 S2 (AC200-240V, 1U,

Max 2 enclosures connection)................................................................................................... 36

Table 2.7 Specifications for power distribution unit for DX80 S2/DX90 S2 (AC200-240V, 2U,

Max 6 enclosures connection)................................................................................................... 36

Table 2.8 Specifications for power distribution unit for DX80 S2/DX90 S2 (AC200-240V, 2U,

Max 8 enclosures connection)................................................................................................... 37

Table 2.9 Required number of outlets and sockets to install power distribution units ............................... 37

Table 2.10 Required conditions for distribution board circuit protectors...................................................... 39

Table 3.1 Ethernet frame capacity (Jumbo Frame settings)...................................................................... 45

Table 3.2 Connectable models and available remote interfaces ............................................................... 51

Table 3.3 ETERNUS Web GUI operating environment ............................................................................. 52

Table 4.1 Enclosure installation order ....................................................................................................... 57

Table 4.2 Specifications for the unit installation area ................................................................................ 62

Table 4.3 Recommended number of hot spares for each drive type......................................................... 62

Table 4.4 Priority order of host interface adapter installation .................................................................... 63

Table 4.5 Priority order of drive enclosure installation (for 2.5" type controller enclosure)........................ 64

Table 4.6 Priority order of drive enclosure installation (for 3.5" type controller enclosure)........................ 64

Table 4.7 Priority order of 2.5" drive installation ........................................................................................ 65

Table 4.8 Priority order of 3.5" drive installation ........................................................................................ 66

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Chapter 1 Hardware Configurations

IMPORTANT

2.5" disk or 2.5" Solid State Drive (SSD)

This chapter explains hardware configurations for the ETERNUS DX Disk storage system.

1.1 Controller Enclosure

This section explains the main components in the controller enclosure.

The controller enclosure contains drives installed in the front, and controllers and power supply units in the rear. Since the power supply units are redundant, operations can continue even if one of them fails. There are two models: a single-controller type and a dual-controller type. For a dual-controller type, operations can continue even if one of the controllers fails.

• The single-controller type differs from the dual-controller type by the fol-

lowing features:

- The controller and I/O module are not duplicated.

- Hot maintenance or swapping of the controller and I/O module is not

possible.

- Concurrent firmware loading or update of the controller firmware and

I/O module firmware is not possible.

- Multipath connection to a single server is not available.

• Fujitsu recommends that the dual-controller types, in which the controller

and I/O module are duplicated, be used in a system where a high level of reliability is required.

■ External views of a 2.5" type controller enclosure

● Front view

Figure 1.1 Front view of a 2.5" type controller enclosure

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Chapter 1 Hardware Configurations

Power supply unit (PSU#1)Power supply unit (PSU#0)

Controller (CM#0)

LAN (MNT) portLAN (RMT) port

Drive interface (OUT) port

Host interface adapter (CA#0)

Host interface adapter (CA#1)

Cover

Power supply unit (PSU#1)

Controller (CM#1)

LAN (RMT) port

Drive interface (OUT) port

Host interface adapter (CA#0)

Power supply unit (PSU#0)

Controller (CM#0)

LAN (MNT) portLAN (RMT) port

Drive interface (OUT) port

Host interface adapter (CA#0)

LAN (MNT) port

Host interface adapter (CA#1) Host interface adapter (CA#1)

1.1 Controller Enclosure

● Rear view

• Single-controller type

Figure 1.2 Rear view of a 2.5" type controller enclosure (single-controller type)

• Dual-controller type

Figure 1.3 Rear view of a 2.5" type controller enclosure (dual-controller type)

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Chapter 1 Hardware Configurations

3.5" disk or 3.5" Solid State Drive (SSD)

1.1 Controller Enclosure

● Top view

Figure 1.4 Top view of a 2.5" type controller enclosure

● Side view

Figure 1.5 Side view of a 2.5" type controller enclosure

■ External views of a 3.5" type controller enclosure

● Front view

Figure 1.6 Front view of a 3.5" type controller enclosure

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Chapter 1 Hardware Configurations

Power supply unit (PSU#1)Power supply unit (PSU#0)

Controller (CM#0)

LAN (MNT) portLAN (RMT) port

Drive interface (OUT) port

Host interface adapter (CA#0)

Host interface adapter (CA#1)

Cover

Power supply unit (PSU#1)

Controller (CM#1)

LAN (RMT) port

Drive interface (OUT) port

Host interface adapter (CA#0)

Power supply unit (PSU#0)

Controller (CM#0)

LAN (MNT) portLAN (RMT) port

Drive interface (OUT) port

Host interface adapter (CA#0)

LAN (MNT) port

Host interface adapter (CA#1) Host interface adapter (CA#1)

1.1 Controller Enclosure

● Rear view

• Single-controller type

Figure 1.7 Rear view of a 3.5" type controller enclosure (single-controller type)

• Dual-controller type

Figure 1.8 Rear view of a 3.5" type controller enclosure (dual-controller type)

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Chapter 1 Hardware Configurations

1.1 Controller Enclosure

● Top view

Figure 1.9 Top view of a 3.5" type controller enclosure

● Side view

Figure 1.10 Side view of a 3.5" type controller enclosure

1.1.1 Controllers

The controller contains a CPU, cache memory, System Capacitor Unit (SCU), non-volatile memory, host interface adapters, drive interface ports, and LAN ports. The controller controls all operations in the ETERNUS DX Disk storage system.

■ CPU

A single core processor is installed.

■ Cache memory

Cache memory enables high speed processing by storing frequently used data. The cache memory capacity for each controller is 2GB for the ETERNUS DX80 S2 and 4GB for the ETERNUS DX90 S2.

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Chapter 1 Hardware Configurations

1.1 Controller Enclosure

■ Host interface adapters

The host interface adapter has interface ports to connect a controller to a server. Up to two host interface adapters can be installed in the controller of an ETERNUS DX Disk storage system. Different types of host interface adapters can exist together in the same controller. For details about the installation rules, refer to "4.4.1 Host Interfaces" (page 63) FC, iSCSI, FCoE, and SAS are available as host interface.

The following table shows the host interface adapter specifications.

Table 1.1 Host interface adapter specifications

Interface Transfer speed (max.) Connector type

FC 8Gbit/s SFP+ 2

iSCSI

FCoE 10Gbit/s SFP+ 2

SAS 6Gbit/s miniSAS (SFF-8088) 2

10Gbit/s SFP+ 2

1Gbit/s RJ-45 2

To perform remote copy using an FC or an iSCSI interface, change the port mode settings from the host interface (CA) to the remote interface (RA) via ETERNUS Web GUI or ETERNUS CLI.

■ Drive interface ports

A drive interface port is used to connect drive enclosures. The following table shows the drive interface port specifications.

Table 1.2 Drive interface port specifications

Interface

SAS 6Gbit/s QSFP 1

Transfer

speed (max.)

Connector type Number of ports for each controller

Number of ports for

each adapter

■ LAN ports

Two LAN ports (RJ-45) are installed in each controller.

● Regions other than EMEA&I

Each LAN port is used for operation management (MNT port) and for remote support function (RMT port) respectively.

● EMEA&I region

The MNT port is used for operation management and the RMT port is used for maintenance.

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Chapter 1 Hardware Configurations

1.2 Drive Enclosures

The following table shows the LAN port specifications.

Table 1.3 LAN port specifications

Interface

Ethernet (1000Base-T/100Base-TX/10Base-T)

■ SCU

A System Capacitor Unit (SCU) is installed in a controller as a backup power source in case of power outage. The SCU is charged from an external power source while the ETERNUS DX Disk storage system is running normally. If a power failure is detected, data in the cache memory is saved to the non-volatile memory in the controller using the SCU. There is no limit to the post-failure data retention time.

1.1.2 Power Supply Units

The power supply unit transforms input AC power from a power socket to DC power and supplies power to each component. Two power supply units are installed in each controller enclosure. Each power supply unit contains fans.

Transfer

speed (max.)

1Gbit/s RJ-45 2

Connector type

Number of ports

for each controller

1.2 Drive Enclosures

This section explains the main components in the drive enclosure. The drive enclosure contains drives installed in the front, and I/O modules and power supply units in the rear. Up to 24 drives can be installed in a 2.5" type drive enclosure. Up to 12 drives can be installed in a 3.5" type drive enclosure. Since the power supply units are redundant, operations can continue even if one of them fails. When a drive enclosure is connected, a DE-ID (drive enclosure number) is automatically allocated.

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Chapter 1 Hardware Configurations

2.5" disk or 2.5" Solid State Drive (SSD)

DE-ID display panel

Power supply unit (PSU#1)

Cover

Drive interface (IN) port

Power supply

unit (PSU#0)

I/O module

(IOM6#0)

Drive interface (OUT) port

Power supply unit (PSU#1)

I/O module (IOM6#1)

Drive interface (IN) port

Drive interface (OUT) port

Power supply

unit (PSU#0)

I/O module

(IOM6#0)

Drive interface (OUT) port

1.2 Drive Enclosures

■ 2.5" type drive enclosure

● Front view

Figure 1.11 Front view of a 2.5" type drive enclosure

● Rear view

• Single-IOM type

Figure 1.12 Rear view of a drive enclosure (single-IOM type)

• Dual-IOM type

Figure 1.13 Rear view of a drive enclosure (dual-IOM type)

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Chapter 1 Hardware Configurations

3.5" disk or 3.5" Solid State Drive (SSD)

DE-ID display panel

1.2 Drive Enclosures

● Top view

Figure 1.14 Top view of a 2.5" type drive enclosure

● Side view

Figure 1.15 Side view of a 2.5" type drive enclosure

■ 3.5" type drive enclosure

● Front view

Figure 1.16 Front view of a 3.5" type drive enclosure

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Chapter 1 Hardware Configurations

Power supply unit (PSU#1)

Cover

Drive interface (IN) port

Power supply

unit (PSU#0)

I/O module

(IOM6#0)

Drive interface (OUT) port

Power supply unit (PSU#1)

I/O module (IOM6#1)

Drive interface (IN) port

Drive interface (OUT) port

Power supply

unit (PSU#0)

I/O module

(IOM6#0)

Drive interface (OUT) port

1.2 Drive Enclosures

● Rear view

• Single-IOM type

Figure 1.17 Rear view of a drive enclosure (single-IOM type)

• Dual-IOM type

Figure 1.18 Rear view of a drive enclosure (dual-IOM type)

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Chapter 1 Hardware Configurations

1.2 Drive Enclosures

● Top view

Figure 1.19 Top view of a 3.5" type drive enclosure

● Side view

Figure 1.20 Side view of a 3.5" type drive enclosure

1.2.1 I/O Modules

The I/O module is a component that controls the interaction between the controller and the drives. The I/O module is connected to the controller or an I/O module on another drive enclosure.

■ Drive interface ports

A drive interface port is used to connect a controller enclosure or drive enclosures. The drive interface port has an IN port and an OUT port. The following table shows the drive interface port specifications.

Table 1.4 Drive interface port specifications

Interface Transfer speed (max.) Connector type Number of ports for each I/O module

SAS 6Gbit/s QSFP

1 (IN) 1 (OUT)

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Chapter 1 Hardware Configurations

DIDI

DE #02

DIDI

DE #01

DIDI

DE #09

DE #0x

DIDI

DI: Drive interface port

DIDI

1.3 Enclosure Connection Path

1.2.2 Power Supply Units

The power supply unit transforms input AC power from a power socket to DC power and supplies power to each component. Two power supply units are installed in each drive enclosure. Each power supply unit contains fans.

1.3 Enclosure Connection Path

For a dual-controller type, a controller enclosure (CE) is connected to drive enclosures (DE) with multiple paths. A drive enclosure has two independent drive interface ports. Path redundancy is maintained by connecting the drive enclosure to two controllers directly. This configuration allows operation to continue even if one of the connection paths fails.

Up to nine drive enclosures can be connected to a controller enclosure as shown in the figures below.

Figure 1.21 Enclosure connection path (dual-controller type)

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+ 49 hidden pages

Eternus DX80 S2, DX90 S2 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

About this Manual

Table of Contents

List of Figures

List of Tables

Chapter 1 Hardware Configurations

1.1 Controller Enclosure

1.1.1 Controllers

1.2 Drive Enclosures

1.1.2 Power Supply Units

1.2.1 I/O Modules

1.3 Enclosure Connection Path

1.2.2 Power Supply Units