DEC RAID Array 3000 storage subsystem, DS-SWXRA-GA, DS-SWXRA-GC, DS-HSZ22-AA, DS-SWXRA-GD User Manual

RAID Array 3000 Storage
Subsystem

Hardware User’s Guide

EK–SMCPO–UG. A01

Digital Equipment Corporation
Maynard, Massachusetts

First Edition, January 1998

The disclosure of this information does not grant to the user a license under any patents,
pending patents, trademarks, or copyrights or other rights of Digital Equipment
Corporation, or of any third party.

This software is proprietary to and embodies the confidential technology of Digital
Equipment Corporation.

Possession, use or copying of the software described in this publication is authorized
only pursuant to a valid written license from Digital Equipment Corporation or an
authorized sublicensor.

Digital Equipment Corporation makes no representation that the use of its products in
the manner described in this publication will not infringe on existing or future patent
rights, nor do the descriptions contained in this publication imply the granting of
licenses to make, use, or sell equipment or software in accordance with the description.

The following are trademarks of Digital Equipment Corporation:
DEC, RAID Array 3000, StorageWorks, and the Digital Logo.

UNIX is a registered trademark in the United States and other countries, licensed
exclusively through X/Opin Company, Ltd..

All other trademarks and registered trademarks are the property of their respective
owners.

©

Digital Equipment Corporation 1997. All Rights Reserved

Printed in USA

Contents

Revision Record

About This Guide

..............................................................................................ix

...........................................................................................xi

1 Product Overview

1.1 Product Description...............................................................................1–1

1.2 Pedestal Features...................................................................................1–4

1.3 Pedestal Cabinet....................................................................................1–4

1.4 Pedestal Components ............................................................................1–6

1.4.1 StorageWorks Building Blocks (SBBs)..............................................1–6

1.4.2 RAID Array Controller......................................................................1–6

1.4.3

1.4.4

1.4.5

1.4.6

1.5 Specifications......................................................................................1–12

Pedestal Power Supplies ....................................................................1–7

Uninterruptable Power Supply...........................................................1–7

Environmental Monitor Unit (EMU) ..................................................1–8

UltraSCSI Bus ...................................................................................1–9

2 RAID Array Controller

2.1 Controller Overview.............................................................................. 2–1

2.2 Controller Features................................................................................2–2

2.3 Controller Reset and LED Indicators .....................................................2–6

2.4 Flexible RAID Set Configuration..........................................................2–7

2.5 Performance Enhancements ..................................................................2–8

2.5.1 Custom Components..........................................................................2–8

2.5.2 Efficient Write and Read Algorithms.................................................2–8

2.6 RAID Levels Supported......................................................................2–10

2.6.1 RAID 0............................................................................................ 2–11

2.6.2 RAID 1............................................................................................ 2–13

2.6.3 RAID 0+1........................................................................................2–13

2.6.4 RAID 4............................................................................................ 2–15

EK–SMCPO–UG. A01 iii

RAID Array 3000 Storage Subsystem

2 RAID Array Controller (continued)

2.6.5 RAID 5............................................................................................2–16

2.6.6 JBOD ..............................................................................................2–18

2.7 System Parameters.............................................................................. 2–18

2.8 Redundant Operation..........................................................................2–20

2.8.1 Initialization....................................................................................2–20

2.8.2 Message Passing.............................................................................. 2–20

2.8.3 Failover...........................................................................................2–20

2.9 Environmental ....................................................................................2–21

2.9.1 Backup Power Management............................................................2–21

2.9.2 Voltage Monitoring......................................................................... 2–22

2.9.3 Temperature Monitoring..................................................................2–24

3 Maintenance

3.1 Introduction..........................................................................................3–1

3.2 Pedestal Status and Power LEDs........................................................... 3–2

3.3 SBB Status LEDs.................................................................................. 3–2

3.4

3.5

3.6 EMU Error Conditions.......................................................................... 3–4

3.6.1 Replacing Components (FRU’s)........................................................3–5

3.6.2 Removing the Pedestal Door .............................................................3–5

3.6.3 Replacing an SBB .............................................................................3–6

3.6.4 Replacing a Power Supply................................................................. 3–7

3.6.5 Replacing the RAID Array Controller ...............................................3–8

3.6.6 Replacing the EMU Board.................................................................3–9

3.6.7 Replacing the UPS .......................................................................... 3–11

3.7 Differential/Wide UltraSCSI Bus........................................................3–11

3.7.1 Reconfiguring the SCSI Bus............................................................3–12

3.8 Replacing the Controller Memory Cache Modules..............................3–16

Controller LEDs ...................................................................................3–3

EMU Error Reporting ...........................................................................3–4

iv EK–SMCPO–UG. A01

4 Expansion Pedestal Option

4.1 Product Description...............................................................................4–1

4.2 Expansion Pedestal Cabinet...................................................................4–2

4.3 Expansion Pedestal Components...........................................................4–4

4.4 Reconfiguring Base Pedestal UltraSCSI Bus .........................................4–5

5 Second Controller Option

5.1 Introduction...........................................................................................5–1

5.2 Installation Procedure............................................................................ 5–2

Figures

1–1 RAID Array 3000 Pedestal Enclosure (Drives Optional) .......................1–2

1–2 Pedestal Front Panel Major Components...............................................1–5

1–3 Pedestal Rear Panel Power Supplies......................................................1–5

1–4 EMU Circuit Board Location................................................................1–8

1–5 Pedestal Rear Panel Components...........................................................1–9

1–6 UltraSCSI Bus Configuration Switch...................................................1–10

1–7 Slot Locations and SCSI ID Addresses................................................1–10

1–8 Slot Locations and SCSI ID Addresses................................................1–11

2–1 Bridging the Gap Between the Host and the Pedestal ............................2–2

2–2 Units Created from Storagesets, Partitions, and Disk Drives..................2–3

2–3 Controller Front Panel...........................................................................2–7

2–4 RAID 0 Write......................................................................................2–12

2–5 Diagram of a RAID 1 Write................................................................2–13

2–6 Diagram of a RAID 0+1 Write............................................................2–14

2–7 Diagram of a RAID 4 Write................................................................2–15

2–8 Diagram of a RAID 5 Write................................................................2–17

3–1 Pedestal Status LEDs ........................................................................... 3–2

3–2 Disk Drive Status LEDs ........................................................................3–3

3–3 Removing Pedestal Door.......................................................................3–5

3–4 Replacing an SBB.................................................................................3–7

3–5 Replacing a Power Supply.....................................................................3–8

3–6 Removing the Controller from the Pedestal...........................................3–9

3–7 Remove EMU Connector Nuts............................................................3–10

Contents

EK–SMCPO–UG. A01 v

RAID Array 3000 Storage Subsystem

Figures (continued)

3–8 Remove Screw and Panel.................................................................... 3–14

3–9 Location of SCSI Bus Configuration Switch.......................................3–15

3–10 Configuration Switch..........................................................................3–15

3–11 Remove Controller..............................................................................3–16

3–12 Release Locking Clips ........................................................................3–17

3–13 Remove Installed Memory Modules....................................................3–17

3–14 Install Replacement Modules.............................................................. 3–18

3–15 Pivot Module Down to Secure ............................................................3–19

4–1 Expansion Pedestal............................................................................... 4–1

4–2 Expansion Pedestal Slot Locations and ID Addresses............................4–3

4–3 Rear Panel Power Supplies ...................................................................4–4

4–4 EMU Circuit Board Location................................................................4–5

4–5 Remove Side Cover from Base Pedestal ...............................................4–7

4–6 Remove SCSI Bus Terminator.............................................................. 4–7

4–7 Disconnect SCSI Cable.........................................................................4–8

4–8 Connect SCSI Jumper...........................................................................4–8

4–9 Remove Connector Knockout Plate.......................................................4–9

4–10 Connect SCSI Cable ...........................................................................4–10

4–11 Set Configuration Switch to 7............................................................. 4–10

4–12 Configuration Switch..........................................................................4–11

4–13 Reconfigured SCSI Bus Addresses...................................................... 4–11

4–14 Connect SCSI Cable Between Pedestals.............................................. 4–12

4–15 Power Cable Connections...................................................................4–13

4–16 Transfer Drives from Base to Expansion Pedestal............................... 4–14

5–1 Second Controlle Slot Position..............................................................5–2

5–2 Insert Module into SIMM Connector ....................................................5–3

5–3 Pivot Module Down to Seat..................................................................5–4

5–4 Remove Controller from Top Slot.........................................................5–4

vi EK–SMCPO–UG. A01

Tables

1–1 RAID Array 3000 Part Numbers and Model Descriptions......................1–3

1–2 Pedestal Specifications........................................................................1–12

1–3 Pedestal Physical and Power Specifications.........................................1–13

2–1 Controller Specifications.......................................................................2–4

2–2 LED/Reset Switch Interface..................................................................2–6

2–3 RAID Levels Supported......................................................................2–10

2–4 Pedestal RAID Set Restrictions...........................................................2–10

2–5 RAID 0+1 Example.............................................................................2–14

2–6 System Parameters..............................................................................2–19

2–7 Backup Power Management................................................................ 2–21

2–8 Acceptable System Voltage Levels .....................................................2–22

2–9 Acceptable Termination Voltage Levels..............................................2–23

2–10 Acceptable 12 Volt Levels ..................................................................2–23

2–11 Acceptable External Temperature Voltage Levels............................... 2–24

2–12 Acceptable Board Temperature Voltage Levels................................... 2–24

3–1 Disk Drive SBB Status LEDs................................................................3–3

3–2 SCSI Bus Length and External Cables.................................................3–11

3–3 Assigned Slot Device Addresses in the Pedestal..................................3–11

Contents

EK–SMCPO–UG. A01 vii

Revision Record

This Revision Record provides a concise publication history of this guide. It lists the
revision levels, release dates, and reasons for the revisions.

The following revision history lists all revisions of this publication and their
effective dates. The publication part number is included in the Revision Level
column, with the last entry denoting the latest revision. This publication supports
the StorageWorks RAID Array 3000 Storage Subsystem.

Revision Level Date Summary of Changes

EK–SMCPO–UG. A01 January 1998 Original release.

EK–SMCPO–UG. A01 ix

About This Guide

This section identifies the audience of this guide and describes the contents (chapter-by­chapter) and structure. I n addition, this section includes a list of associated documents
and the conventions used in this guide.

Intended Audience

This guide is intended for installers and operators of the RAID Array 3000
storage subsystem. Installing the subsystem requires a general understanding of
basic SCSI terminology and SBus product installation procedures.

Document Structure

This guide contains the following chapters:

Chapter 1: Product Overview

Product Overview

the single pedestal RAID Array 3000 storage subsystem. It includes the major
features, a brief description of the major components, and the specifications for
the pedestal.

Chapter 2: RAID Array Controller

RAID Array Controller

controller in the RAID Array 3000. It also lists the RAID levels supported by the
subsystem and a brief description of each level. Redundant operation and
environmental considerations (i.e. backup power management, voltages, and
temperature) are covered at the end of the chapter.

provides an overview and a physical hardware description of

describes the major features and characteristics of the

Chapter 3: Maintenance

Maintenance

pedestal as a troubleshooting aid in case of a problem. The chapter also describes
how to replace a Field Replaceable Unit (FRU) in the pedestal, how to re­configure the SCSI bus, and how to add or replace a memory SIMM module in
the RAID controller.

EK–SMCPO–UG. A01

describes how to interpret the status and power LEDs on the

xi

RAID Array 3000 Pedestal Enclosure

Chapter 4: Expansion Pedestal Option

Expansion Pedestal Option

the pedestal expansion kit option. It also explains how to reconfigure the SCSI
bus in the base pedestal to accommodate the added storage capability of the
expansion pedestal.

describes the major features and characteristics of

Chapter 5: Second Controller Option

Second Controller Option

pedestal for redundancy.

describes how to install a second controller in the

Associated Documents

In addition to this guide, the following documentation is useful to the reader:

Table 1 Associated Documents

Document Title Order Number

StorageWorks RAID Array 3000 Configuration and
Maintenance Guide

Installation Instructions for the RAID Array 3000 Pedestal
Expansion Kit Option Product Note

Installation Instructions for the RAID Array Replacement
Controller – SWXRC-03

EK–SMCS2–UG

EK–SMCPM–PN

EK–SMCPL–PN

Conventions

This guide uses the following documentation conventions:

Table 2 Style Conventions

Style Meaning

plain monospace type Text

boldface type

italic type For emphasis, manual titles, chapter

xii

For the first instance of terms being
defined in text, or both.

summaries, keyboard key names

.

EK–SMCPO–UG. A01

About This Guide

Conventions (

continued

)

Table 3 Nomenclature Convention

RAID Advisory Board Description RAID Array 3000 Usage

RAID 0 STRIPset
RAID 1 MIRRORset
RAID 0+1 STRIPED MIRRORset
RAID 4 STRIPED with a Fixed parity drive
RAID 5 STRIPED with a Floating parity drive

Support and Services

Who to contact in the Americas

Information and Product Questions:

Installation Support:

DIGITAL Multivendor Customer Service (MCS):
Installation

Warranty

Remedial

Customer Support Center (CSC)

Local Sales Office / StorageWorks Hotline
1-800-786-7967

Contact the DIGITAL Distributor where the
Storage Solution was Purchased / Local Digital
Sales Office.

Contact the DIGITAL Customer Support Center
(CSC).

Contact the DIGITAL Customer Support Center
(CSC) for warranty service after solution is
installed and operating.

Contact the DIGITAL Customer Support Center
(CSC)

A Service Contract is recommended when

Note:

the equipment is out of warranty. Contact the
local DIGITAL Sales Office.

1 800-354-9000

EK–SMCPO–UG. A01

xiii

RAID Array 3000 Pedestal Enclosure

Who to contact in Europe

Information and Product Questions: Contact the DIGITAL Distributor or reseller
Installation Support and Installation: Contact the DIGITAL Distributor or reseller from

whom the Storage Solution was purchased.

For Warranty Service See the Warranty Card packaged with the

product.

For Remedial Service Contact the DIGITAL Distributor or reseller from

whom the Storage Solution was purchased.
Note: A Service Contract is recommended

when the equipment is out of warranty.

Who to contact in Asia Pacific

For all services, contact the DIGITAL Distributor or reseller from whom the
equipment was purchased

xiv

EK–SMCPO–UG. A01

1

Product Overview

This chapter provides an overall description of the RAID Array 3000 storage subsystem
and its components. A list of technical and environmental specifications is located at the
end of the chapter.

NOTE

This guide is the Hardware User’s Guide. For c on­figuration information, refer to the

RAID Array 3000 for W indows NT – Int el Installa­tion Guide
sole (SWCC) 2.0 User’s Guide.

and the

StorageW orks Command Con-

1.1 Product Description

The RAID Array 3000 storage subsystem (Figure 1–1) is a desk-side subsystem
offering the basic components required to create a user-designed storage array
with two 16-bit, differential UltraSCSI bus host interfaces. The pedestal can ac­commodate up to seven 3½-inch storage devices. The devices, referred to as
StorageWorks Building Blocks or SBBs, are disk drives from the StorageWorks
family of storage devices. The release note that accompanies the subsystem lists
the software solutions and disk drives that are supported. A battery backup sub­system is included as part of the pedestal enclosure in the form of a free-standing
UPS (Uninterruptable Power Supply). In case of a power failure, the UPS pro­vides a temporary backup for cache while the subsystem flushes to disks.

The RAID Array 3000 offering also includes option kits designed to increase the
storage capacity and enhance the performance of the subsystem. The first is an
expansion pedestal (second enclosure) designed to increase the storage capacity
of the subsystem to a maximum of 14 drives. The pedestal expansion kit option
is described in detailed in Chapter 4 of this guide.

The second option allows the addition of a second RAID controller to the subsys­tem for redundancy. The second controller operates in conjunction with the in­stalled controller to protect data during a malfunction. Chapter 5 describes how
to install the redundant controller option and how to reconfigure the subsystem to
accommodate it.

Getting Started

EK–SMCPO–UG. A01 1–1

RAID Array 3000 Storage Subsystem

The RAID Array 3000 pedestal enclosure and its associated options are listed
and described in Table 1–1. Figure 1–1 shows the pedestal with a full comple­ment of drives (optional) for completeness.

Figure 1–1 RAID Array 3000 Pedestal Enclosure (Drives Optional)

PEDESTAL

The RAID 3000 pedestal is equipped with a dual-channel RAID controller which
supports all of the UltraSCSI bus features. It also contains an Environmental
Monitor Unit (EMU) board for environmental monitoring and error detection.

1–2 EK–SMCPO–UG. A01

UPS

3000-01A

Chapter 1. Product Overview

y

y

Table 1–1 Pedestal RAID Array 3000 Part Numbers and Model Descriptions

DIGITAL Part No. Item Description

DS-SWXRA-GA

DS-SWXRA-GC

DS-HSZ22-AA Second HSZ22 controller with 16 MB of cache and two 16 MB

DS-SWXRA-GD Expansion Pedestal (120/240 V) with slot space for seven addi-

DS-SWXRA-GR Single 204-watt power supply for RA3000, 120/230 V for on-site

RA3000 pedestal subsystem with one controller, 120 V.
Includes:

HSZ22 two-channel controller with 16 MB cache, Environmental
Monitor Unit (EMU), two 204 watt power supplies with fans, five
meter host SCSI cable (BN37A), BN38E-OB adapter, one 120­volt Un-interruptable power suppl
power cords. Disks are not included.

Requires

disks.

Options

pedestal, and cache memory upgrade.

RA3000 pedestal subsystem with one controller, 230 V.
Includes:

HSZ22 two-channel controller with 16 MB cache, Environmental
Monitor Unit (EMU), two 204 watt power supplies with fans, five
meter host SCSI cable (BN37A), BN38E-OB adapter, one 230­volt Un-interruptable power suppl
power cords. Disks are not included.

Requires

disks.

Options

pedestal, and cache memory upgrade.

SIMMs for mirror cache, one BN37A-05 five-meter UltraSCSI
cable, and one BN38E-OB adapter.

tional UltraSCSI disk drives.

spare.

Seven-slot pedestal for wide UltraSCSI SBBs, one

(UPS), and North American

: Solutions Software Kit for platform, host adapter, and

: Second HSZ22 controller, seven-disk SBB expansion

Seven-slot pedestal for wide UltraSCSI SBBs, one

(UPS), and North American

: Solutions Software Kit for platform, host adapter, and

: Second HSZ22 controller, seven-disk SBB expansion

EK–SMCPO–UG. A01 1–3

RAID Array 3000 Storage Subsystem

1.2 Pedestal Features

The major features of the pedestal are:

Two differential 16-bit UltraSCSI host buses

•

Seven 3½-inch disk drive SBB slots

•

One dual-channel RAID array controller

•

Second controller option for redundancy

•

Expansion pedestal option allowing up to fourteen SBB slots in a dual-

•

pedestal subsystem configuration
Memory cache expansion option for the controller

•

Redundant power provided by two fan-cooled universal ac input power sup-

•

plies (50/60 Hz, 100 to 240 V ac)
Cache backup provided by an external Uninterruptable Power Supply (UPS)

•

Environmental monitor unit (EMU) for error detection

•

The ability to hot swap SBBs without powering down the system

•

1.3 Pedestal Cabinet

The pedestal cabinet is a modular free-standing storage enclosure that is com­pletely self contained. It has two fan-cooled power supplies, an internal EMU
circuit board, and a RAID array controller with front panel display and control.

Figure 1–2 shows the major components in the pedestal enclosure.
Figure 1–3 identifies the items on the rear panel power supplies. The character-

istics of the pedestal cabinet are outlined below.

The disk drive storage capacity is seven 3½-inch disk drive SBBs

•

The subsystem slots are numbered 0 through 6 from top to bottom

•

There are two 68-pin high density female SCSI connectors on the rear panel

•

which interconnect the host system to the RAID controller in the pedestal
The rear panel also contains an alarm switch, a UPS monitor connector, an

•

external fault condition connector, and a serial port connector (for controller
configuration)

The pedestal is equipped with an internal configuration switch which sets the

•

SCSI ID addresses of the controller and the storage devices

1–4 EK–SMCPO–UG. A01

Chapter 1. Product Overview

Figure 1–2 Pedestal Front Panel Major Components

Figure 1–3 Pedestal Rear Panel Power Supplies

EK–SMCPO–UG. A01 1–5

RAID Array 3000 Storage Subsystem

1.4 Pedestal Components

The major components in the pedestal subsystem include:

Dual-channel RAID array controller

•

Two 16-bit single-ended split SCSI buses

•

Environmental Monitor Unit (EMU)

•

Two universal 50/60 Hz, 120 or 240 Vac power supplies

•

Separate free-standing backup power supply (UPS)

•

1.4.1 StorageWorks Building Blocks (SBBs)

The pedestal has seven 3½-inch disk drive SBB slots. The number of drives that
make up each configuration of the array is left to the end user with a maximum
of seven storage devices.

1.4.2 RAID Array Controller

The controller contains two Wide/UltraSCSI/differential host channels and two
Wide/UltraSCSI/Single-Ended disk channels. In dual-controller configurations,
the controllers support fully automatic and smooth controller failover.

The controller supports one or two standard 72-pin cache SIMMs of up to
64 MB. In a redundant controller setup, both controllers must have identical
cache configurations and the total usable cache (per controller) will be half the
amount installed. Thus, in a single controller setup the maximum usable cache is
128 MB while a redundant setup has a maximum usable cache of 64 MB (per
controller).

The RAID Array controller contains the following features:

Single PCB form factor for inclusion in the enclosure

•

Support for dual hot-swap controller operation

•

Dual differential Ultra-Wide SCSI host channels

•

Dual single-ended Ultra-Wide SCSI disk channels

•

RAID level 0, 1, 0+1, 4, 5, and JBOD support

•

EMU support

•

Cluster support for Windows NT

•

32 Logical Units (LUNs) per host channel (some operating systems may be

•

limited to 8)
Support for Hot and Warm spare disks

•

UPS backed write caching

•

1–6 EK–SMCPO–UG. A01

Chapter 1. Product Overview

Per LUN write cache/write back selection

•

Configuration/Maintenance via RS-232 or host SCSI channel using SWCC

•

(StorageWorks Command Console)
Update of firmware via host channel

•

1.4.3 Pedestal Power Supplies

The pedestal has two interchangeable, air-cooled, AC power supply modules lo­cated at the rear of the unit. The power supplies provide redundant power if one
of the units should malfunction. Each supply provides +5 and +12 Vdc to power
the RAID controller, EMU, and the storage SBBs in the pedestal. In addition,
each unit contains a high-speed fan for pedestal cooling. The upper power supply
is designated as "A" and the lower as "B". The unit contains an ac power recep­tacle, a power status LED, a fan, and a latching slider switch to secure the supply
in the pedestal.

1.4.4 Uninterruptable Power Supply (UPS)

The UPS is separate and free-standing unit designed to protect the pedestal from
problems associated with poor quality AC power or a complete loss of AC
power. The UPS is connected between the AC outlet and the line input of the
pedestal power supply “B” to provide battery backup power.

The major features of the UPS include Cell Saver Technology (doubles battery
life and speeds recharge time), hot-swap batteries, and network surge protection.
The front panel display has user controls (LEDs and control buttons) and the rear
panel contains a COMM port, which provides UPS status to the EMU in the ped­estal. The rear panel also contains the network surge protector, a reset button,
and four power receptacles. An audible alarm is activated when input power
fails, as a Low Battery Warning, or whenever the UPS is in need of servicing.

The UPS automatically recharges its battery when power is returned following a
power failure. Recharge time is four to six hours depending on the energy re­quirements of your load and the length of the power outage.

Its own installation, operation, and service manual support the UPS. The manual
describes the UPS in detail and is part of the documentation set enclosed with
your subsystem.

EK–SMCPO–UG. A01 1–7

RAID Array 3000 Storage Subsystem

300

0-3

1.4.5 Environmental Monitor Unit (EMU)

The EMU is an internal circuit board that monitors the operation of the pedestal.
The EMU monitors power supply voltages, fans, temperatures which are reported
to the user, and controls (turns on and off) the audible alarm and status LED on
the front panel. The EMU also reports the subsystem status to the controller that
reports to the host, and has the capability of exchanging signals with auxiliary
devices and controllers.

The EMU is located internally in the top rear of the pedestal as shown in Figure
1–4). It is connected to the SCSI bus and powered by an internal cable. The fol­lowing external components on the rear panel of the pedestal are part of the
EMU (see Figure 1–5):

An alarm switch (S1) that enables (up) or disables (down) the audible alarm

•

A power monitor connector (UPS) allows the EMU to monitor and report the

•

status of a battery backup power supply
An External Fault Condition connector allows the EMU to monitor the status

•

of a user-selected device

Figure 1–4 EMU Circuit Board Location

EMU

1–8 EK–SMCPO–UG. A01

7

Figure 1–5 Pedestal Rear Panel Components

300

0-23

)

)

Chapter 1. Product Overview

UPS

Host #0

External

Fault

Host #1

Contro ller (To p

Controller (Bottom

A

1.4.6 UltraSCSI Buses

The pedestal contains two, 16-bit, single-ended, wide UltraSCSI buses (factory­configured as a split bus) that connects the controller(s) to the disk drives.

The split-bus arrangement is divided into two bus paths designated
and

device port 1

upper four devices in the pedestal (IDs 8 through 11) and port 1 connects the
controller to lower three devices (IDs 8 through 10). The device addresses on the
bus are set at the factory by an internal configuration switch (see Figure 1–7).

EK–SMCPO–UG. A01 1–9

as shown in Figure 1–6. Port 0 connects the controller to the

device port 0

RAID Array 3000 Storage Subsystem

Figure 1–6 UltraSCSI Bus Port and Default SCSI ID Assignments

ID 8

ID 9

ID 1 0

ID11

ID 8

Device

Port 0

Top Controller

ID =7

B o ttom Con troller (Op t io na l)

ID =6

ID 9

Device

Port 1

ID 1 0

ID = 7

ID = 6

300 0- 51

When set to a specific position, the switch controls the addresses of each SBB
slot. Figure 1–8 identifies the pedestal slot locations and their corresponding
SCSI ID addresses for each device port.

The subsystem can be reconfigured for “through-bus” operation by modifying the
bus and resetting the internal configuration switch. The information needed to
reconfigure the bus from “split-bus” to a “through-bus” configuration is de­scribed in Chapter 4 of this guide (

Expansion Pedestal Option

).

1–10 EK–SMCPO–UG. A01

Figure 1–7 UltraSCSI Bus Configuration Switch

300

0-3

8

Figure 1–8 Slot Locations and SCSI ID Addresses

Chapter 1. Product Overview

6

EK–SMCPO–UG. A01 1–11

SLOT 0

SLOT 1

SLOT 2

SLOT 3

SLOT 4

SLOT 5

SLOT 6

Controller

ID = 8

ID = 10

Device
Port 0

11

8

Device
Port 1

-

RAID Array 3000 Storage Subsystem

1.5 Specifications

Table 1–2 Pedestal Technical Specifications

Technical Specifications

Item Description

Cabinet Pedestal with seven (7) disk SBB slots

Controller HSZ22
Controller cache 16 MB standard

Backup for cache Standard un-interruptable power supply (UPS)
Mirrored write-back cache Yes
Device channels per controller 2
Maximum disks per device

port
Dual active controllers Yes, order HSZ22-Aa and second solutions

Host interface UltraSCSI wide differential
Drive interface UltraSCSI wide single-ended
RAID levels supported 0, 1, 0+1, 4, 5
Non-RAID disk support Yes (JBOD)
Sustained I/O rate 4,400 I/O’s per second per controller pair
RAID 5 sustained transfer rate 28 MB per second per controller pair
Maximum transfer rate 40 MB per second per controller pair
Redundant fans Yes
Redundant power supplies Yes
Global disk spares Yes
Environmental Monitoring Unit Yes, monitors power and temperature
Setup/control lines One serial
Serviceability Hot-swap components
RAID manager GUI support StorageWorks Command Console (SWCC)

Regulatory approvals UL, CSA, TUV, FCC, CE MARK, C TICK,

Expansion pedestal with an additional 7 slots

Upgrades to 128 MB for a two controller pair

14

software kit

2.0 available for all platforms. Netware re­quires serial line connection

BCIQ, VCCI

1–12 EK–SMCPO–UG. A01

Chapter 1. Product Overview

y

Table 1–3 Pedestal Physical and Power Specifications

Physical Specifications

Item Dimension

Height 564 mm
Width 254 mm
Depth 494 mm
Rear Clearance (air exhaust) 305 mm
Front Clearance (door opening) 305 mm
Weight (no devices) 19.5 kg

Power Specifications

Item Rating

Input power 110-240 Vac, 50/60 Hz, single

phase, 12A/6A
Heat dissipation 3070 BTUs/hr.
Temperature (optimal, minimum required) 18 to 24° C, 10 to 40° C
Altitude Up to 2,400 m
Air quality Not to exceed 500,000 parti-

cles/ft3 for air at a size of 0.5

micron or larger
Total power per power suppl

(Total of +12 Vdc and +5 Vdc outputs)

Nominal output voltages +5 Vdc @ 15 amps, maximum

Device startup time 4-second internal, minimum

204 Watts, maximum

+12 Vdc @ 12 amps, maximum

EK–SMCPO–UG. A01 1–13

2

RAID Array Controller

This chapter describes the major featur es and characteristics of the RAID array control­ler in the RAID Array 3000 subsystem. The num ber of devices suppor ted by t he cont rol­ler may be limited by the enclosure.

2.1 Controller Overview

The RAID Array controller provides high performance, high-availability access
to SCSI disk array subsystems along a UltraSCSI/Wide SCSI bus. With a modu­lar hardware design and an intuitive configuration utility, the controller is de­signed to meet a wide range of storage needs.

The controller consists of a single 5 1/2” x 8” PCB mounted in a sheet metal
subassembly. The package consists of the controller PCB, a 300-pin connector,
mechanical insertion assists, and an LED/reset switch interface. All signals to the
controller are routed through the backplane connector.

The unit is configured with two Ultra Wide, differential SCSI host channels ca­pable of transferring data to and from the host at rates up to 40 MB/s. The host
SCSI IDs are configurable via the Host Parameters and can support 32 deep
tagged queuing. The controller is also configured with two Ultra Wide, single­ended SCSI disk channels capable of transferring data to and from the disk drives
at rates up to 40 MB/s. Each channel can support up to 15 drives (14 in redun­dant controller subsystems).

The controller has two SIMM connectors for up to 128 MB of cache memory.
The SIMM connectors form a mirrored pair when the controllers are configured
in a redundant controller configuration; otherwise they are fully accessible by the
controller. In a redundant controller setup, both controllers must have identical
cache configurations and the total usable cache (per controller) will be half the
amount installed. Thus, in a single controller setup the maximum usable cache is
128 MB while a redundant setup has a maximum usable cache of 64 MB (per
controller).

EK–SMCPO–UG. A01 2–1