Compaq 4200 Family User Manual

Enclosure 4200 Family
LVD Disk Enclosures

User Guide

First Edition (July 1999)

Part Number: EK–SW2ZS–UG. A01 / 148451–001

Compaq Computer Corporation

Notice

While Compaq Computer Corporation believes the information included in this manual is correct as of
the date of publication, it is subject to change without notice. Compaq makes no representations that the
interconnection of its products in the manner described in this document will not infringe existing or
future patent rights , nor do the de s cri ptions contained in thi s doc ume nt im ply the granting of licenses to
make, use, or sell equip ment or soft ware in acco rdance with th e descripti on. No responsibi lity is as sumed
for the use or reliability of firmware on equipment not supplied by Compaq or its affiliated companies.
Possession, use, or copying of the software or firmwar e described in this documentation is authorized
only pursuant to a valid written license from Compaq, an authorized sublicensor, or the identified
licensor.

© 1999 Digital Eq uipment Corporation.
All rights reserved. Printed in U.S.A.

Compaq, the Compaq logo, DIGITAL, and StorageWorks, Registered in the United States Patent and
Trademark Office and other jurisdictions.

Other product names menti oned herein may be trademarks and/or registered tr ademarks of their
respective companies.

Model 4200 Family LVD Disk Enclosure
First Edition (July 1999)

Part Number EK–SW2ZS–UG A01 / 148451–001

Contents

About This Guide

Chapter 1

Introducing the Enclosure

Disk Enclosure Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2

SCSI Buses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3

High Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3

Variable Speed Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3

Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3

Data Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3

Status Monitoring and Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4

Enclosure Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4

Major Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6

Element Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6

Element Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6

Chapter 2

Starting the Enclosure

Connecting the SCSI Bus Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1

Applying Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4

Verifying Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4

Chapter 3

I/O Module

Module Power Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2

iv Enclosure 4200 Family LVD Disk Enclosures Users Guide

Single-Bus Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2

SCSI Bus Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3

SCSI Bus Termination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3

Status Displays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3

SCSI Address Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4

Replacing an I/O Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4

Chapter 4

Disk Drives

Status Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2

Disk Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2

Drive Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4

Drive Blank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4

Replacing a Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–5

Chapter 5

Enclosure Power and Cooling

Enclosure Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2

Power Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2

Temperature Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3

Fan Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3

Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3

Status Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4

Replacing a Power Supply or Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4

Chapter 6

Replacing CRUs

Ordering a Spare CRU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1

ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2

Basic Replacement Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2

Replacing a Drive with a Drive Blank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4

Appendix A

Regulatory Notices

FCC Class B Certification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–1

Country-Specific Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–2

Appendix B

Specifications

Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–1

Contents v

Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–4

Power Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–5

Glossary
Index

List of Figures

Figure 1–1. Disk Enclosure (Front View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1

Figure 1–2. Disk Enclosure (Rear View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2

Figure 1–3. Front Mounted Elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5

Figure 1–4. Rear Mounted Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5

Figure 2–1. Single Bus Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2

Figure 2–2. Front Status LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5

Figure 2–3. Rear Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5

Figure 3–1. Single-Bus I/O Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2

Figure 3–2. Single Bus Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3

Figure 4–1. Typical 1-Inch Disk Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1

Figure 4–2. Disk Drive LEDs Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2

Figure 4–3. Drive Blank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4

Figure 5–1. Power Supply and Fan Assembly Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1

Figure 6–1. Typical Product Label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1

Figure A–1. Typical Product Label Country-Specific Certifications. . . . . . . . . . . . . . . . . . . . . A–2

Figure B–1. Dimensions–Vertical Orientation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–2

Figure B–2. Dimensions–Horizontal Orientation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–2

List of Tables

Table 1 Documentation Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi ii

Table 2 Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

Table 1–1 CRU Replacement Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6

Table 2–1 SCSI Bus Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2

Table 2–2 Installing SCSI Bus Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4

Table 3–1 Single-Bus Module LED Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4

Table 3–2 Disk Enclosure Bay Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4

Table 4–1 Disk LED Status Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2

Table 5–1 Power Supply and Fan Status Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4

Table 6–1 Common Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2

Table 6–2 Installing a Drive Blank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4

Table B–1 14-Disk Enclosure Physical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–3

Table B–2 Element Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–3

Table B–3 Operating Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–4

Table B–4 Shipping or Short Term Storage Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–4

Table B–5 AC and DC Power Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–5

Intended Audience

This publication is designed for use by Compaq StorageWorks users who are responsible
for installing and maintaining the Model 4214R (rack) and 4214T (tower) Ultra2 SCSI
low voltage differential (LVD) disk enclosures.

How this Guide is Arranged

This manual discusses the product features and operations from the general to the specific.
The major sections of this publicatio n include:

Chapter 1, “Introducing the Enclosure”

This chapter is a description of the LVD disk enclosure features and elements.

About This Guide

Chapter 2, “Starting the Enclosure”

This chapter discusses operating an LVD disk enclosure.

Chapter 3, “I/O Module”

This chapter discusses the I/O modules functions, operation, and status displays.

xii Enclosure 4200 Family LVD Disk Enclosures Users Guide

Chapter 4, “Disk Drives”

This chapter describes the disk drives, operation, and status reporting.

Chapter 5, “Enclosure Power and Cooling”

The chapter describes the power supply and fan operation and status reporting.

Chapter 6, “Replacing CRUs”

This chapter describes the procedures for replacing customer replaceable units (CRUs).

Appendix A, “Regulatory Notices”

This appendix defines the country-specific regulatory standards for this product.

Appendix B, “Specifications”

This appendix describes the physical, environmental, and electrical specifications of the
LVD disk enclosure and elements.

Glossary

The glossary defines terms common to this product.

Index

An alphabetical reference to major subjects.

Documentation Conventions

The documentation conventions used in this publication are shown in Table1.

Table 1 Documentation Conventions

Symbol Description

Boldface type Boldface type indicates the first instance of terms being defined in the text, the

glossary, or both.

italic type Italic type indicates one of the following:

■ Emphasis

■ A publication title

■ A glossary cross-reference to another glossary entry.

Caution

Text symbol

data.

Note Notes contain information of

WARNING

Text symbol

for information essential to avoid damaging software, hardware, or

special interest

for actions required to prevent the possibility of personal injury.

.

xiii

Enclosure and EMU LED label
(Symbol definitions follow.)

Enclosure Status LED symbol (green)

Enclosure Power Status LED symbol (green)

NOTE: This
action required to prevent the possibility of personal injury.

Enclosure Fault LED symbol (amber)

I/O module LED label
Terminator Status LED (green)

LED symbol i

s not the same as the

text symbol

for an

xiv Enclosure 4200 Family LVD Disk Enclosures Users Guide

Table 1 Documentation Conventions (Continued)

Symbol Description

I/O module LED label
Power Status (O

I/O module label
Ultra2 SCSI, Single Bus, LVD input connector

N) or EMU Locate (FLASHING) LED (green)

Light emitting diode (LED) is O

LASHING.

LED is F

LED is O

N.

FF.

Related Documents

Table 2 lists publications that contai n additional information relevant to the LVD disk
enclosure products.

Disk Enclosure RETMA Rack Mounting Kit Installation Card
Disk Enclosure RETMA Rack Mounting Template
Environmental Monitoring Unit for

Enclosure Models 4214R and 4214T User Guide
Hot-Pluggable Wide-Ultra2 SCSI Hard Drives Installation Card
Replacing a Disk Enclosure Environmental Monitoring Unit Installation Guide
Replacing a Disk Enclosure Power Supply Installation Guide
Replacing a Disk Enclosure Ultra2 SCSI I/O Module Installation Guide
Replacing a Disk Enclosure Variable Speed Fan Installation Guide
Tower Model 4200T-Series User Guide

xv

Table 2 Related Publications

StorageWorks Publication Title Part Number

127430-001
102943-001

122941-001
386195-001

148455-001
148454-001
148453-001
148452-001
122942-001

Chapter

1

Introducing the Enclosure

This chapter de scribes of the StorageWorks Enclosure 42 00 family of low voltage
differential (LVD) disk enclosures (see Figure 1–1 and Figure 1–2). These enclosures

support Wide-Ultra and Wide-Ultra2 small computer system interface (SCSI)
protocols. The internal bus supports only LVD drives. The external bus (the enclosure to
the host controller bus) supports either Wide-Ultra2 (LVD) and or Wide-Ultra
single-ended (SE) SCSI pro tocols.

Figure 1–1. Disk Enclosure (Front View)

CXO6854A

1–2 Enclosure 4200 Family LVD Disk Enclosures User Guide

Figure 1–2. Disk Enclosure (Rear View)

Disk Enclosure Features

The Model 4214 enclosure supports up to fourteen, 1-inch high, 3.5-inch form factor
hard disk drives. This enclosure is available in either a rack mountable version (4214R)

or in a tower (4214T). A rack (cabinet) mounted enclosure requires a RETMA 3U v ertical

opening (5.25-inches) where a “U” is 1.75-inches.

CXO6912A

The enclosure provides several features, including:

■ Hot-pluggable drives, environmental monitoring unit (EMU), fans, and power

supplies are replaceable without halting SCSI bus data transfers.

■ Pluggable I/O module and SCSI bus cables require quiescing the bus (that is,

stopping all data transfers), but do not require removing power before replacing.

■ Depending upon the host controller, the I/O module is capable of supporting

Wide-Ultra SCSI (LVD) or Wide-Ultra SCSI (SE) bus operations.

■ Depending upon the host-interface controller, an EMU may support the automatic

monitoring of specific enclosure and drive functions.

The enclosure has guides that ensure the drives, EMU, I/O module, and power supplies
(the enclosure elements) align and properly mate with the backplane connectors. A guide
post on the fan ensures that the fan properly mates with the power supply. The elements
and the metal enclosure provide electromagnetic interference (EMI) suppression and
control airflow within the enclosure.

SCSI Buses

The enclosure supports only Wide-Ultra2 SCSI, wide (16-bit), internal LVD buses.
Depending on the host interface, the e xternal SCSI b us, the b us from the I/O module to the
host can be either Wide-Ultra or Wide-Ultra2, LVD or SE. The SCSI bus type determines
the length of this bus, and therefore, the maximum cable length. The standard Compaq
cable length of 12 ft (3.7 m) ensures satisfactory operation. As for all SCSI buses, the
shorter the cable, the more efficient the bus operation.

High Availability

The high availability features of the enclosure are a function of the fans and the power
supplies.

Variable Speed Fans

All enclosures have two variable speed fans. In all configurations, the failure of one fan
automatically causes the other fan to operate at a high speed. This ensures that the failure
of a single fan does not disable the enclosure.

Introducing the Enclosure 1–3

Power Supplies

In a single power supply configuration, the failure of a power supply disables the
enclosure. Use the optional redundant power supply configuration to prevent this. In this
configuration, the failure of a single power supply or fan does not disable the enclosure.

Data Integrity

Data integrity could be compromised if data transfers occur when there is no DC power to
the I/O module or the drives, To avoid inducing errors, the power pins on these elements
are longer than the data pins. This ensures that power is always present when a data
transfer occurs.

1–4 Enclosure 4200 Family LVD Disk Enclosures User Guide

Status Monitoring and Display

The major status monitoring capabilities of these enclosures include:

■ Displaying the enclosure status on the enclosure LEDs

■ Displaying the element status on the power supply, EMU, drive, and I/O module LEDs

■ Detecting the installation of a fan, power supply, drive, or I/O module

■ Detecting the removal of a fan, power supply, drive, or I/O module

■ Sensing enclosure temperatures

■ Sensing power supply voltage, current, and total power

The EMU user guide describes the functions and features of the EMU.

Enclosure Layout

The physical layout of the enclosure is the same whether in a rack or a tower. The drives
mount in the bays in the front of the enclosure. These bays are numbered from the left

1

(bay

is by the bay number. The drive in bay
forth.

) to the right (bay r, see Figure 1–3). The common method of referri ng to a drive

1

is drive 1, the drive in bay 8 is drive 8, and so

At location

t

are the three enclosure status LEDs.

Introducing the Enclosure 1–5

1

3

5

2

4

Figure 1–3. Front Mounted Elements

7

9

6

8

10

11

12

13

14

15

CXO6728A

The I/O module, power supplies, fan s, EMU, and cables mo unt in th e rear of the enclosur e

(see Figure 1–4).

1

1

EMU

2

Fan 1

3

Power Supply Bay 1, or
Fan Mounting Assembly

1. In a single power supply configuration, the fan mounts on the fan mounting assembly.

Figure 1–4. Rear Mounted Elements

1

2 3 4 5 6

CXO6979A

4

Fan 2

5

Power Supply Bay 2

6

I/O Module