EMC DLm120, DLm4080, DLm4020, DLm960 Planning Manual

EMC® Disk Library for mainframe

Physical Planning Guide

P/N 300-009-100

REV A03

EMC Corporation

Corporate Headquarters

Hopkinton, MA 01748

1

-508-435-1000

www.EMC.com

-9103

:

Copyright © 2010 EMC Corporation. All rights reserved.

Published October, 2010

EMC believes the information in this publication is accurate as of its publication date. The information is
subject to change without notice.

THE INFORMATION IN THIS PUBLICATION IS PROVIDED “AS IS.” EMC CORPORATION MAKES NO
REPRESENTATIONS OR WARRANTIES OF ANY KIND WITH RESPECT TO THE INFORMATION IN THIS
PUBLICATION, AND SPECIFICALLY DISCLAIMS IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE.

Use, copying, and distribution of any EMC software described in this publication requires an applicable
software license.

For the most up-to-date regulatory document for your product line, go to the Technical Documentation and
Advisories section on EMC Powerlink.

For the most up-to-date listing of EMC product names, see EMC Corporation Trademarks on EMC.com.

All other trademarks used herein are the property of their respective owners.

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EMC Disk Library for mainframe Physical Planning Guide

Warnings and Cautions

Preface

Chapter 1 Physical Planning

Planning overview............................................................................ 18

DLm system presite considerations ............................................... 19

DLm120 ....................................................................................... 19

DLm960 ....................................................................................... 19

DLm4020 ..................................................................................... 19

DLm4080 ..................................................................................... 20

General considerations ............................................................. 20

Other requirements ................................................................... 20

Other considerations ........................................................................ 22

Environmental specifications................................................... 22

System host cabling requirements........................................... 22

Remote support.......................................................................... 22

Planning for upgrades .............................................................. 23

Contents

Chapter 2 System Configuration and Host Connectivity

DLm120 overview............................................................................. 26

DLm120 system.......................................................................... 26

DAE.............................................................................................. 27

Modems....................................................................................... 27

DLm960 overview............................................................................. 28

VTEC bay .................................................................................... 28

NAS bay ...................................................................................... 29

NAS expansion bay ................................................................... 29

EMC Disk Library for mainframe Physical Planning Guide

3

Contents

Storage bay ................................................................................. 29

DAE ............................................................................................. 29

Modems ...................................................................................... 30

DLm4020 overview .......................................................................... 31

DLm4020 system........................................................................ 31

DAE ............................................................................................. 32

Modems ...................................................................................... 32

DLm4080 overview .......................................................................... 33

System bay.................................................................................. 33

Storage bay ................................................................................. 34

NAS Expansion bay .................................................................. 34

DAE ............................................................................................. 34

Modems ...................................................................................... 34

Installation information................................................................... 36

Chapter 3 Physical and Environmental Specifications

Physical data...................................................................................... 38

Environmental data.......................................................................... 39

Air flow ....................................................................................... 39

Environment acclimation ......................................................... 39

Power and cooling data............................................................ 41

Chapter 4 System Placement

Placement options............................................................................. 44

DLm120 configuration floor cutouts ...................................... 44

DLm960 configuration floor cutouts ...................................... 45

DLm4020 configuration floor cutouts .................................... 45

DLm4080 configuration floor cutouts .................................... 47

Chapter 5 Power Requirements

DLm power requirements ............................................................... 50

Single-phase power extension cords and connectors............54

DLm touch current compliance...................................................... 59

Regulatory compliance .................................................................... 60

Choosing a UPS................................................................................. 61

Index

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EMC Disk Library for mainframe Physical Planning Guide

Figures

Ti tle Page

1 Cable connection for DLm960 ...................................................................... 30

2 Cable connection for DLm120, DLm4080, and DLm4020 ........................ 35

3 DLm120 configuration floor cutout............................................................. 44

4 DLm960 configuration floor cutout............................................................. 45

5 DLm4020 configuration floor cutout........................................................... 46

6 DLm4080 configuration floor cutout........................................................... 47

7 Caster and leveler dimensions ..................................................................... 48

8 Power distribution cabling — DLm120 and DLm4020............................. 51

9 Power distribution cabling —DLm960 ....................................................... 52

10 Power distribution cabling — DLm4080 .................................................... 53

11 EMC model number DLmP40U-60-US cable description........................ 55

12 DLm120 bay, DLm960 VTEC, and storage bays single-phase cabling... 56

13 DLm960 NAS and NAS expansion bays single-phase cabling................ 57

14 DLm4020 single-phase cabling..................................................................... 57

15 DLm4080 system and storage bays single-phase cabling ........................ 58

16 DLm4080 expansion storage and storage bays single-phase cabling..... 58

EMC Disk Library for mainframe Physical Planning Guide

5

Figures

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EMC Disk Library for mainframe Physical Planning Guide

Tables

Ti tle Page

1 Pre-installation responsibility summary...................................................... 18

2 External dependencies information.............................................................. 36

3 DLm physical specification for single bay................................................... 38

4 DLm environmental data............................................................................... 39

5 Environmental requirements for shipping and storage............................ 39

6 Environmental acclimation............................................................................ 40

7 DLm120 power consumption and heat dissipation ................................... 41

8 DLm960 power consumption and heat dissipation ................................... 41

9 DLm4020 power consumption and heat dissipation................................. 41

10 DLm4080 power consumption and heat dissipation ................................. 41

11 North American, single-phase, electrical specifications............................ 50

EMC Disk Library for mainframe Physical Planning Guide

7

Tab les

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EMC Disk Library for mainframe Physical Planning Guide

The following warnings and cautions pertain throughout this guide.

War ning Trained service personnel only.

This EMC product has more than one power supply cord. To reduce
the risk of electric shock, disconnect all power supply cords before
servicing.

Ground-circuit continuity is vital for safe operation of the machine.
Never operate the machine with grounding conductors disconnected.
Remember to reconnect any grounding conductors removed for or
during any installation procedure.

Attention Resérvé au personnel autorisé.

Warnings and Cautions

Cet appareil EMC comporte plus d'un cordon d'alimentation. Afin de
prévenir les chocs électriques, débranchez tous les cordons
d'alimentation avant de faire le dépannage.

Un circuit de terre continu est essentiel en vue du fonctionnement
sécurisé de l'appareil. Ne mettez jamais l'appareil en marche lorsque
le conducteur de mise à la terre est débranché.

Warnung Nur für authorisiertes Fachpersonal.

Dieses EMC Produkt verfügt über mehrere elektrische
Netzanschlüsse. Zur Vermeidung eines elektrischen Schlages sind vor
Servicearbeiten an der Stromversorgung alle Netzanschlüsse. zu
trennen.

EMC Disk Library for mainframe Physical Planning Guide

9

Warnings and Cautions

WARNING

WARNING

WARNING

CAUTION

!

Kontinuierliche Erdung ist notwendig während der gesamten
Betriebsdauer des Gerätes. Es ist unzulässig das Gerät ohne Erdung
zu betreiben. Gerät muss geerdet werden, bevor es am Stromnetz
angeschlossen wird.

Additional warnings

and cautions

Before attempting to service the EMC hardware described in this
document, observe the following additional Warnings and Cautions:

The hardware enclosure contains no user-serviceable parts, so it
should not be moved or opened for any reason by untrained persons.
If the hardware needs to be relocated or repaired, only qualified
personnel familiar with safety procedures for electrical equipment
and EMC hardware should access components inside the unit or
move the unit.

This product operates at high voltages. To protect against physical
harm, power off the system whenever possible while servicing.

In case of fire or other emergency involving the EMC product, isolate
the product’s power and alert appropriate personnel.

Trained personnel are advised to exercise great care at all times
when working on EMC hardware.
Remember to:

◆ Remove rings, watches, or other jewelry and neckties before you begin

any procedures.

◆ Use caution near any moving part and any part that may start

unexpectedly such as fans, motors, solenoids, etc.

◆ Always use the correct tools for the job.

◆ Always use the correct replacement parts.

◆ Keep all paperwork, including incident reports, up to date, complete,

and accurate.

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EMC Disk Library for mainframe Physical Planning Guide

Warnings and Cautions

CAUTION

!

Static precautions EMC incorporates state-of-the-art technology in its designs, including

the use of LSI and VLSI components. These chips are very susceptible
to damage caused by static discharge and need to be handled
accordingly.

Before handling printed circuit boards or other parts containing
LSI and/or VLSI components, observe the following precautions:

◆ Store all printed circuit boards in antistatic bags.

◆ Use a ground strap whenever you handle a printed circuit board.

◆ Unless specifically designed for non disruptive replacement, never

plug or unplug printed circuit boards with the power on. Severe
component damage may result.

EMC Disk Library for mainframe Physical Planning Guide

11

Warnings and Cautions

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EMC Disk Library for mainframe Physical Planning Guide

Preface

This document provides information about the physical and
environmental requirements, floor placement, connectivity, and
power requirements to plan the installation of DLm systems.

As part of an effort to improve and enhance the performance and capabilities
of its product lines, EMC periodically releases revisions of its hardware and
software. Therefore, some functions described in this document may not be
supported by all versions of the software or hardware currently in use. For
the most up-to-date information on product features, refer to your product
release notes.

If a product does not function properly or does not function as described in
this document, please contact your EMC representative.

This manual is part of the documentation set for the EMC Disk
Library for mainframe (DLm) system and is intended for customers,
including the system administrators, the customer’s electrician, and
EMC Sales and Customer Support personnel involved in planning
the installation of DLm systems.

Chapter 1, “Physical Planning,” provides an overview of the physical

planning for the DLm systems.

Chapter 2, “System Configuration and Host Connectivity,”provides

an overview of the connectivity for the DLm systems.

Chapter 3, “Physical and Environmental Specifications,” explains the

physical and environmental requirements for DLm systems.

Chapter 4, “System Placement,” provides the suggested system floor

placement for DLm systems.

EMC Disk Library for mainframe Physical Planning Guide

13

Preface

CAUTION

!

WARNING

DANGER

Chapter 5, “Power Requirements,” provides the power requirements

and information about connecting the DLm systems to a customer’s
source PDU.

Related documentation:

◆ EMC Disk Library for mainframe User Guide

◆ EMC Disk Library for mainframe Release Notes

For more information on all DLm-related publications, contact your
EMC Sales Representative or refer to the EMC Powerlink website at:

http://Powerlink.EMC.com > Navigator > Disk Library Tools

Conventions used in

this guide

EMC uses the following conventions for notes, cautions, warnings,
and danger notices.

Note: A note presents information that is important, but not hazardous.

A caution contains information essential to avoid data loss or
damage to the system or equipment. The caution may apply to
hardware or software.

A warning contains information essential to avoid hazardous
situations that can cause severe personal injury, death, or
substantial property damage if you ignore the warning.

A danger notice contains information essential to avoid hazardous
situations that will cause severe personal injury, death, or
substantial property damage if you ignore the message.

14

EMC Disk Library for mainframe Physical Planning Guide

Preface

Typographical

conventions

EMC uses the following type style conventions in this document:

Normal

Bold

Italic

Courier

Courier bold

Courier, italic

Courier, bold,
italic

< >

[ ]

|

{ }

...

Used in running (nonprocedural) text for:

• Names of interface elements (such as names of windows,
dialog boxes, buttons, fields, and menus)

• Names of resources, attributes, pools, Boolean expressions,
buttons, DQL statements, keywords, clauses, environment
variables, functions, utilities

• URLs, pathnames, filenames, directory names, computer
names, filenames, links, groups, service keys, file systems,
notifications

Used in running (nonprocedural) text for:

• Names of commands, daemons, options, programs,
processes, services, applications, utilities, kernels,
notifications, system calls, man pages

Used in procedures for:

• Names of interface elements (such as names of windows,
dialog boxes, buttons, fields, and menus)

• What user specifically selects, clicks, presses, or types

Used in all text (including procedures) for:

• Full titles of publications referenced in text

• Emphasis (for example a new term)

• Variables

Used for:

• System output, such as an error message or script

URLs, complete paths, filenames, prompts, and syntax when
shown outside of running text

Used for:

• Specific user input (such as commands)

Used for:

• Arguments used in examples of command-line syntax

• Variables in examples of screen or file output

• Variables in path names

Variables used in a command-line sample

Angle brackets enclose parameter or variable values supplied by
the user

Square brackets enclose optional values

Vertical bar indicates alternate selections - the bar means “or”

Braces indicate content that you must specify (that is, x or y or z)

Ellipses indicate nonessential information omitted from the
example

EMC Disk Library for mainframe Physical Planning Guide

15

Preface

Where to get help EMC support, product, and licensing information can be obtained as

follows.

Product information — For documentation, release notes, software
updates, or for information about EMC products, licensing, and
service, go to the EMC Powerlink website (registration required) at:

http://Powerlink.EMC.com

Technical support — For technical support, go to EMC Customer
Support on Powerlink. To open a service request through Powerlink,
you must have a valid support agreement. Please contact your EMC
sales representative for details about obtaining a valid support
agreement or to answer any questions about your account.

Your comments

Your suggestions will help us continue to improve the accuracy,
organization, and overall quality of the user publications. Please send
your opinion of this guide to:

[e-mail]

If you have issues, comments, or questions about specific information
or procedures, please include the title and, if available, the part
number, the revision (for example, A02), the page numbers, and any
other details that will help us locate the subject you are addressing.

16

EMC Disk Library for mainframe Physical Planning Guide

1

nvisible Body Tag

Physical Planning

This chapter covers the tasks to be completed when planning an
installation of DLm systems at the customer site. Read the
information and follow the procedures in the order documented in
this chapter:

◆ Planning overview............................................................................. 18

◆ DLm system presite considerations ................................................ 19

◆ Other considerations ......................................................................... 22

Physical Planning

17

Physical Planning

Planning overview

Tab le 1 Pre-installation responsibility summary

This section provides an overview of the planning requirements for
EMC® Disk Library for mainframe (DLm) installation. It reviews
EMC’s responsibilities and outlines customer’s responsibilities.

Note: Inform EMC of any labor union-based restrictions or security clearance
requirements prior to delivery.

The DLm systems must be installed in a properly equipped computer
room, with controlled temperature and humidity, proper airflow and
ventilation, proper power and grounding, system cable routing
facilities, fire equipment, and so on. Although a raised floor is not
required, it is recommended. One or more planning sessions with
your EMC Systems Engineer and EMC Customer Support
Representative will be necessary to close all the details related to
installation. Table 1 on p ag e 18 lists the responsibility summary at the
first planning session.

EMC Customer

Provide all details necessary for site planning and preparation. Provide an environment that supports safe installation of the

Complete and process the Installation Planning Task Sheet and
Presite Survey.

Arrange for shipment and delivery through an appropriate
method.

Install a properly working system.

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EMC Disk Library for mainframe Physical Planning Guide

DLm system and promotes its reliable long-term operation.

Provide appropriate modem phone line, power, cooling and
ventilation, humidity control, floor load capability, and service
clearances as required.

Participate in planning sessions as required to ensure a smooth
and uncomplicated installation.

DLm system presite considerations

When planning the installation site for your DLm system, meet with
your EMC representative to complete the presite plan.

Physical Planning

DLm120

DLm960

DLm120 is a one-bay solution.

When fully configured, the weight of the DLm120 system is
1248 lb (567.2 kg).

The maximum weight of the bay caster is 444.6 lb (201.7 kg).

DLm960 contains one VTEC bay, one NAS bay, an optional NAS
expansion bay, and up to ten storage bays.

When fully configured, the weight of each bay is:

◆ VTEC bay — 874 lb (397.2 kg)

◆ NAS bay — 1330 lb (604.5 kg)

◆ Storage bay — 1400 lb (636.4 kg)

The maximum weight per bay caster is:

◆ VTEC bay — 520 lb (235.9 kg)

◆ NAS bay — 501 lb (227.3 kg)

◆ Storage bay — 535 lb (242.7 kg)

Note: The weight of NAS expansion bay is same as that of the NAS bay.

DLm4020

DLm4020 is a one-bay solution.

When fully configured, the weight of the DLm4020 bay is 1257 lb
(575.6 kg).

The maximum weight of the bay caster is 444.6 lb (201.7 kg).

DLm system presite considerations

19

Physical Planning

DLm4080

General considerations

DLm4080 contains one system bay, one expansion storage bay, and
up to five storage bays.

When fully configured, the weight of each bay is:

◆ System bay — 1380 lb (627.3 kg)

◆ Storage bay — 1330 lb (604.5 kg)

◆ Expansion storage bay — 1400 lb (636.4 kg)

The maximum weight per bay caster is:

◆ System bay — 520 lb (235.9 kg)

◆ Storage bay — 501 lb (227.3 kg)

◆ Expansion storage bay — 535 lb (242.7 kg)

Before installing the DLm system at your site, consider these factors:

◆ Weight capacities of the service elevator if delivery is to another

floor

◆ Availability of an equipment ramp if the receiving floor is not on

level with computer room floor

Note: All portions of the bay should clear ramp and threshold slopes up
to 1:10 (rise to run ratio), per Code of Federal Regulations – ADA
Standards for Accessible Design, 28 CFR Part 36.

Other requirements

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EMC Disk Library for mainframe Physical Planning Guide

◆ Weight capacities of the loading dock

◆ Weight capacities of the tailgate

Other requirements are:

◆ Appropriate floor covering required for protection

◆ Direct dial-up phone line (for remote support) within six feet (two

meters) of the unit

◆ Hardware power requirements

“Environmental data” on page 39 specifies the power requirements

for DLm bays.

Physical Planning

Physical
specifications

Transportation and
delivery guidelines

Chapter 3, “Physical and Environmental Specifications,” provides

overall system dimensions for the DLm systems.

Mode of transport guidelines:

◆ For a DLm system delivered within the United States or Canada,

EMC recommends an air-ride truck. The DLm system is wrapped
in custom-designed shipping material, crated, and palletized.

◆ For a DLm system delivered internationally, EMC recommends

shipment by air freight. Unless otherwise instructed, the EMC
Traffic Department arranges for delivery directly to the
customer’s computer room.

To ensure successful delivery of DLm systems, EMC has formed
partnerships with specially selected moving companies. These
companies have moving professionals trained in the proper handling
of large, sensitive systems. These companies provide the appropriate
personnel, floor layouts, and any ancillary moving equipment
required to facilitate delivery.

DLm system presite considerations

21

Physical Planning

CAUTION

!

Other considerations

Install the DLm in a properly equipped and well-ventilated computer
room.

Environmental specifications

System host cabling requirements

Layout and space
recommendations

Remote support

DLm requires the environmental specifications outlined in

“Environmental data” on page 39. Ensure that the site meets or

exceeds the specifications listed for both nonraised floor and raised
floor environments.

The Presite Survey, completed with the EMC Systems Engineer,
reports the Fibre connection (FICON) or Enterprise Systems
Connection (ESCON) cable lengths required for each host connection
to the DLm. From a physical planning perspective, review the routing
paths from the hosts to the DLm system. Resolve any physical access
issues prior to installation day.

Layout and space considerations are described in “Placement

options” on page 44.

When moving the DLm bays down an incline, the rear of the bay
must go first and when moving up an incline, the rear of the bay
must go last.

Remote support is an important and integral part of the EMC
customer service and support strategy. Communication between the
EMC Customer Support Center and the DLm occurs either through
IP connections to the customer's local area network, or through the
external serial modem connected to the DLm, which requires
customers to provide one dedicated phone line for the modem.

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EMC Disk Library for mainframe Physical Planning Guide

Physical Planning

DLm supports one modem in each of its ACPs and control stations.
These sections provide more information on the modems DLm
supports:

◆ DLm120 — “Modems” on page 27

◆ DLm960 — “Modems” on page 30

◆ DLm4020 — “Modems” on page 32

◆ DLm4080 — “Modems” on page 34

Note: You do not need a separate phone line for each modem. You can move
phone lines between modems connected to ACPs and Control Stations as
needed.

Planning for upgrades

When planning for upgrades, consider space, power, and
environmental concerns.

Other considerations

23

Physical Planning

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EMC Disk Library for mainframe Physical Planning Guide

2

System Configuration

and Host Connectivity

This chapter covers the configurations and host connectivity of the
DLm system:

◆ DLm120 overview.............................................................................. 26

◆ DLm960 overview.............................................................................. 28

◆ DLm4020 overview............................................................................ 31

◆ DLm4080 overview............................................................................ 33

◆ Installation information .................................................................... 36

System Configuration and Host Connectivity

25

System Configuration and Host Connectivity

CAUTION

!

DLm120 overview

The DLm120 configuration contains just one bay. A fully configured
DLm120 contains five storage DAEs (excluding vault DAE) with
approximately 47.5 TB of usable storage.

The DLm120 system equipment enclosures and power system are
designed to support DLm120 system equipment only. EMC does
not support any other components in the DLm120 system
enclosure, and recommends that you do not install any additional
equipment in the DLm120 bay.

DLm120 system

The DLm120 system contains the following:

◆ Two AC P s

◆ Up to two VTEs:

• FICON or ESCON channel adapters

• AHA363 compression adapters (FICON VTE only)

◆ Two 1 Gb Ethernet switches

◆ Four external EMC International modems

◆ One network server (NS120) and one storage array with two

Storage Controllers (Data Movers), two Control Stations, two
storage processors, dual standby power supplies, one to five
storage DAEs, and one boot DAE

The DLm120 system has two power zones with independent power
cables — one for each side, capable of powering the fully configured
DLm120 rack.

Power requirements for the DLm system are specified in Chapter 5,

“Power Requirements”

Note: Channel extenders are not supported.

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EMC Disk Library for mainframe Physical Planning Guide

System Configuration and Host Connectivity

DAE

Modems

Each storage DAE includes:

◆ Fifteen 1 TB SATA II disk drives

◆ Two Link Control Cards (LCC)

◆ Redundant power supplies

The boot DAE includes:

◆ Six FC drives

◆ Two link control cards (LCC)

◆ Redundant power supplies

DLm120 ships with four modems. ACPs and Control Stations
support one modem each. Each DLm network server supports two
Control Stations. A DLm120 is configured with two ACPs and one
network server.

DLm120 overview

27

System Configuration and Host Connectivity

CAUTION

!

DLm960 overview

The DLm960 configurations are composed of combinations of one
VTEC bay, one NAS bay, one optional NAS expansion bay, and a
maximum of ten storage bays.

A fully configured DLm960 with expansion storage contains 126
storage disk-array enclosures (DAE) with approximately 1197 TB of
usable storage.

All DLm960 bays have two power zones with independent power
cables, each zone capable of powering a fully configured bay

Chapter 5, “Power Requirements” contains specifications for DLm

power requirements.

The DLm960 VTEC, NAS, and storage bay equipment enclosures
and power systems are designed to support DLm960 system
equipment only. EMC does not support any other components in
these bays, and recommends that you do not install any additional
equipment in the DLm960 bays.

VTEC bay

The DLm960 VTEC bay contains the following:

◆ Two AC P s

◆ Up to six VTEs

◆ Switches:

• Two 1 Gb Ethernet switches

• Two 10 Gb Ethernet switches

Note: Channel extenders are not supported.

◆ The VTEC bay requires two power connections.

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EMC Disk Library for mainframe Physical Planning Guide

System Configuration and Host Connectivity

NAS bay

NAS expansion bay

The DLm960 NAS bay contains:

◆ One network server (NS960) and integrated storage arrays

comprising:

• Two to six Storage Controllers (Data Movers)

• Two Control Stations

• Two storage processors — SPA and SPB

• Dual standby power supplies

◆ Up to three DAEs (excluding Vault DAE)

◆ The NAS bay requires four power connections.

The DLm960 NAS Expansion bay contains one network server
(NS960) and integrated storage arrays comprising:

◆ Two to six Storage Controllers (Data Movers)

◆ Two Control Stations

◆ Two storage processors — SPA and SPB

◆ Dual standby power supplies

◆ Up to three DAEs (excluding Vault DAE)

The expansion bay requires four power connections.

Storage bay

DAE

The DLm960 storage bay is configured with up to 12 storage DAEs.
The Storage bay requires two power connections.

Each storage DAE includes:

◆ Fifteen 1 TB SATA II disk drives

◆ Two LCCs

◆ Redundant power supplies

The boot DAE includes:

◆ Six Fibre Channel (FC) drives

◆ Two LCCs

◆ Redundant power supplies

DLm960 overview

29

System Configuration and Host Connectivity

ACP

Phone

ACP

VTE

VTE

VTE

VTE

VTE

VTE

IP Control

Ficon

IP Replication

240 VAC

GEN-001200

Control Station

Control Station

Data Mover

Data Mover

Data Mover

Data Mover

Data Mover

Data Mover

Modems

DLm960 ships with four to six modems. ACPs and Control Stations
support one modem each. Each DLm network server supports two
Control Stations. Therefore, a DLm960 system, with a minimum
configuration of two ACPs and one network server, ships with four
modems. A DLm960 system with an additional network server (NAS
expansion bay) has six modems.

Figure 1 on page 30 shows the cable connection for DLm960 and
Figure 2 on page 35 shows the cable connection for DLm120,

DLm4080, and DLm4020.

30

Figure 1 Cable connection for DLm960

EMC Disk Library for mainframe Physical Planning Guide

DLm4020 overview

CAUTION

!

System Configuration and Host Connectivity

The DLm4020 configuration comprises just one bay. A fully
configured DLm4020 contains five storage DAEs (excluding Vault
DAE) with approximately 47.5 TB of usable storage, where each
storage DAE contains 9.5 TB of storage.

The DLm4020 system has two power zones with independent power
cables. Each zone is capable of powering the fully configured
DLm4020 rack.

Chapter 5, “Power Requirements” specifies the power requirements

for the DLm4020.

The DLm4020 system equipment enclosures and power systems are
designed to support DLm4020 system equipment only. EMC does
not support any other components in the DLm4020 system
enclosure, and recommends that you do not install any additional
equipment in the DLm4020 bay.

DLm4020 system

The DLm4020 system contains the following:

◆ Up to two ACPs

◆ Up to two VTEs

◆ Two 1 Gb Ethernet switches

◆ Two ESCON or FICON channels per VTE.

◆ One Low-Voltage Differential (LVD) SCSI to High-Voltage

Differential (HVD) SCSI converter for connection to physical tape
devices with HVD SCSI interface

◆ One network server (NS20) and one storage array comprising two

Storage Controllers (Data Movers), two Control Stations, two
storage processors, dual standby power supplies, one boot DAE
and upto five storage DAEs

DLm4020 overview

31

System Configuration and Host Connectivity

DAE

Modems

Each storage DAE includes:

◆ Up to 15 one TB SATA II disk drives

◆ Two LCCs

◆ Redundant power supplies

The boot DAE includes:

◆ 6 FC drives

◆ Two LCCs

◆ Redundant power supplies

DLm4020 includes three or four modems. ACPs and Control Stations
support one modem each. Each DLm network server supports two
Control Stations. Thus aDLm4020 system configured with one ACP
and one network server, includes three modems. A system with two
ACPs includes an additional modem.

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EMC Disk Library for mainframe Physical Planning Guide

DLm4080 overview

CAUTION

!

System Configuration and Host Connectivity

The DLm4080 configurations are composed of combinations of one
system bay, up to five storage bays, and one optional expansion
storage bay.

A fully configured DLm4080 contains 60 storage disk-array
enclosures (DAEs) with approximately 570 TB of usable storage. Each
DAE is of 9.5 TB of storage.

All DLm4080 bays have two power zones with independent power
cables, each zone capable of powering a fully configured bay.

Chapter 5, “Power Requirements” contains specifications for DLm

power requirements.

The DLm4080 system, storage, and expansion storage bay
equipment enclosures and power systems are designed to support
DLm4080 system equipment only. EMC does not support any other
components in these bays, and recommends that you do not install
any additional equipment in the DLm4080 bays.

System bay

The DLm4080 system bay contains the following:

◆ One or two ACPs

◆ Up to four VTEs

◆ Two 1 Gb Ethernet switches

◆ Two ESCON or FICON Channels per VTE

◆ One Low-Voltage Differential (LVD) SCSI to High-Voltage

Differential (HVD) SCSI converter for connection to physical tape
devices with HVD SCSI interface

◆ One network servers (NS80) and integrated storage array

comprising:

• Two, three, or four Storage Controllers (Data Movers)

• Two Control Stations

• Dual standby power supplies

•Two storage processors

◆ One DAEs (excluding Vault DAE)

DLm4080 overview

33

System Configuration and Host Connectivity

DLm4080 System bay requires four power drops.

Storage bay

NAS Expansion bay

DAE

A fully configured DLm4080 has five storage bays in addition to a
system bay and a NAS expansion bay. The first storage bay can have
up to 13 DAEs. The other storage bays can have up to 10 DAEs each.

The DLm4080 storage bay requires 2 power drops.

The DLm4080 NAS expansion bay contains the following:

◆ One network servers (NS80) and integrated storage array

comprising:

• Two, three, or four Storage Controllers (Data Movers)

• Two Control Stations

• Dual standby power supplies

• Two storage processors

• Up to 6 DAEs (Excluding Vault DAE)

The DLm4080 NAS expansion bay requires four power connections.

Each storage DAE includes:

◆ Up to 15 one TB SATA II disk drives

◆ Two LCCs

◆ Redundant power supplies

34

The boot DAE includes:

◆ 6 FC drives

◆ Two LCCs

◆ Redundant power supplies

Modems

Depending on its configuration, DLm4080 includes three to six
modems. ACPs and Control Stations support one modem each. Each
DLm network server supports two Control Stations. Therefore, with a
minimum configuration of one ACP and two Control Stations, DLm
includes three modems. An additional ACP, includes four modems,
and depending on whether an additional Control Stations is available
(Expansion storage bay), five to six modems.

EMC Disk Library for mainframe Physical Planning Guide

System Configuration and Host Connectivity

ACP

ACP

VTE

VTE

Control Station

Control Station

Data Mover

Data Mover

Phone

IP Control

Ficon

IP Replication

240 VAC

GEN-001199

Chapter 5, “Power Requirements,” specifies the power requirements

for DLm4080.

Figure 2 on page 35 shows the cable connection for DLm120,

DLm4080, and DLm4020.

Figure 2 Cable connection for DLm120, DLm4080, and DLm4020

DLm4080 overview

35

System Configuration and Host Connectivity

Installation information

Discuss and obtain the following site profile information from the
EMC Sales Representative. Tabl e 2 on pa ge 3 6 lists the external
information that is required for configuring DLm systems.

Tab le 2 External dependencies information

Requirements Specifications

Mainframe Software • Operating system and version number

Channel Information • Channel type

Configuration Information • LPARs which will use DLm

• JES2 or JES3

• Number of channels

• Type of channels: FICON or ESCON

• Physical Control Unit Address (CUADD)

• Physical Device Addresses (UNITADD)

• Device type

• Device name-logical device name for VTE display

• Tape volume prefix

36

Tape Management System
Information

Tape Volume Information • Volume serial number range for VTE tapes

Purpose of DLm • Number of physical drives that will be replaced by virtual tapes

a.While planning for VOLSER ranges, be aware that EMC supports individual VOLSER ranges of up to
10,000 tape volumes only. But a DLm can support many such VOLSER ranges.

EMC Disk Library for mainframe Physical Planning Guide

• Tape Management System

• Version

• Scratch reports used

• Quantity of tape volumes

• Mainframe applications that will access the virtual tapes

• Backup software that will be used on the VTE

a

3

Physical and

Environmental

Specifications

This chapter covers the physical and environmental specifications for
DLm:

◆ Physical data....................................................................................... 38

◆ Environmental data ........................................................................... 39

Physical and Environmental Specifications

37

Physical and Environmental Specifications

Physical data

Table 3 on pa g e 38 lists the DLm physical specifications:

Tab le 3 DLm physical specification for single bay

Description Measurements

Height 76.66 in (194.7 cm)

Width 24.02 in (61.0 cm)

Depth DLm 120/960 41.88 in (106.4 cm)

Depth DLm 4020/4080 41.16 in (104.5 cm)

Clearance for service and airflow

Front 42 in (106.7 cm)

Rear 42 in (106.7 cm)

Top 18 in (45.7 cm)

a. With trim kit (optional) attached.

a

38

EMC Disk Library for mainframe Physical Planning Guide

Environmental data

Physical and Environmental Specifications

Table 4 on pa g e 39 provides the environmental data.

Tab le 4 DLm environmental data

Condition Limits

o

Operating temperature 50

Operating altitude (at 32o) 7500 ft (2286 m)

Operating altitude (maximum) 10,000 ft (3048 m) 1.1

Operating humidity 20% to 80% noncondensing

Raised floor environment Recommended but not required

– 90o F (10o to 32o C)

o

derating per 1000 ft

Air flow

Environment acclimation

Air flow for cooling is from front to rear, as shown in Ta b le 5 o n

page 39.

Tab le 5 Environmental requirements for shipping and storage

Condition Setting

o

Ambient temperature -40

Temperature gradient 43.2

Relative humidity 10% to 90% noncondensing

Maximum altitude 35000 ft (10667.6 m)

to 149o F (-40o to 65o C)

o

F/hr (24o C/hr)

A DLm system requires time to become acclimated to a computer
room environment before and after you unpack it. Before unpacking
the unit, allow it to stabilize for 16 hours. After unpacking the unit,
do not apply AC power to it for at least the number of hours specified
in Tabl e 6 o n pag e 40.

Environmental data

39

Physical and Environmental Specifications

Tab le 6 Environmental acclimation

Transit / storage

environment

before applying

power (minimum)

Condition (°F) (°C) %RH

Nominal 68 – 72 20 – 22 < 30% 0 – 1

Cool / Damp < 68 < 20 > 30% 4

Cold / Dry < 68 < 20 < 30% 4

Hot / Dry 72 – 149 22 – 65 < 30% 4

Hot / Humid 72 – 149 22 – 65 30 – 45% 4

72 – 149 22 – 65 45 – 60% 8

72 – 149 22 – 65 60 – 90% 16

Note: The system's environment must have temperature and humidity
values that prevent condensation to occur on any system part. Altitude and
atmospheric pressure specifications are referenced to a standard day at 58.7°F
(14.8°C). Maximum wet bulb temperature is 82°F (28°C).

Hours required

40

EMC Disk Library for mainframe Physical Planning Guide

Physical and Environmental Specifications

Power and cooling data

Tab le 7 DLm120 power consumption and heat dissipation

System configuration description aTotal power consumption (kVA) Heat dissipation (Btu/Hr)

DLm120 3.60 11,500

a. System configuration values are calculated for a fully loaded configuration. Contact your EMC Sales

Tab le 8 DLm960 power consumption and heat dissipation

System configuration description aTotal power consumption (kVA) Heat dissipation (Btu/Hr)

VTEC bay 3.20 11,000

Storage bay 4.04 13,200

NAS bay

a. All VTEC bay values are calculated for a fully loaded configuration. Contact your EMC Sales Representative for

b. The power consumption for the NAS expansion bay is the same as the NAS bay.

Table 7 on pa g e 41 , Ta b le 8 o n page 41, Tab l e 9 o n page 4 1 and
Table 10 on p age 41 provide details of power consumption and heat

dissipation for DLm120, DLm960, DLm4020, and Dlm4080 systems
respectively.

Representative for specific supported configurations.

b

5.72 17,200

specific supported configurations.

Tab le 9 DLm4020 power consumption and heat dissipation

System configuration description aTotal power consumption (kVA) Heat dissipation (Btu/Hr)

DLm4020 with 1 ACP 3.80 12,064

DLm4020 with 2 ACPs 4.01 12,757

a. System configuration values are calculated for a fully loaded configuration. Contact your EMC Sales Representative

for specific supported configurations.

Tab le 10 DLm4080 power consumption and heat dissipation

System configuration description aTotal power consumption (kVA) Heat dissipation (Btu/Hr)

System bay with 1 ACP 4.56 15,100

System bay with 2 ACPs 4.77 15,793

Storage bay 4.38 14,200

Expansion storage bay 4.72 15,300

Environmental data

41

Physical and Environmental Specifications

a. All system bay values are calculated for a fully loaded configuration. Contact your EMC Sales Representative for

specific suppor ted configurations.

42

EMC Disk Library for mainframe Physical Planning Guide

4

System Placement

This chapter covers the physical placement options that are available
for DLm:

◆ Placement options.............................................................................. 44

System Placement

43

System Placement

GEN-001149

VTEC bay

41.88 in.
Includes
front and
rear doors

8.00 in.

6.00 in.

24.02 in.

42.00 in.

Service area

42.00 in.

Service area

Placement options

You can install a DLm system on a solid floor or raised floor.
Although not required, the raised floor environment is preferred.

DLm120 configuration floor cutouts

Figure 3 DLm120 configuration floor cutout

Figure 3 on page 44 illustrates the configuration and the

recommended floor tile cutouts for the DLm120 configuration. The
illustrations assumes that the floor tiles are 24 x 24 in. (61 x 61 cm).

When planning the placement of DLm960:

44

◆ NAS expansion bays are cabled to the VTEC bay using 5-meter

cables and can be up to three bays away from the VTEC bay, with
the cabling under a raised floor. The NAS bays may be positioned
on either side of the VTEC bay.

◆ The first storage bay connected to the NAS or NAS expansion bay

should not be more than three meters away.

EMC Disk Library for mainframe Physical Planning Guide

System Placement

NAS expansion bayNAS bay

Storage bays Storage bays

VTEC bay

42.00 in.

Service area

Front

GEN-001152

41.88 in.
Includes
front and
rear doors

8.00 in.

6.00 in.

24.02 in.

Floor tiles
24 in. sq.

42.00 in.

Service area

◆ Other storage bays are daisy chained together using 8-meter

cables and can be up to five bays away from the NAS or NAS
expansion bay with cabling under a raised floor.

DLm960 configuration floor cutouts

DLm960 supports a maximum of 13 bays. Figure 4 on page 45
illustrates the configuration and the recommended floor tile cutouts
for the DLm960 configuration. The illustrations assume that the floor
tiles are 24 x 24 in. (61 x 61 cm).

DLm4020 configuration floor cutouts

Figure 4 DLm960 configuration floor cutout

Figure 5 on page 46 illustrates the configuration and the

recommended floor tile cutouts for the DLm4020 configuration. The
illustrations assume that the floor tiles are 24 x 24 in. (61 x 61 cm).

Placement options

45

System Placement

CL4259

System bay

41.16 in.
Includes
front and
rear doors

8.00 in.

6.00 in.

24.02 in.

42.00 in.

Service area

42.00 in.

Service area

46

Figure 5 DLm4020 configuration floor cutout

EMC Disk Library for mainframe Physical Planning Guide

System Placement

Front

CL4260

Expansion storage bay Storage baySystem bay

41.16 in.
Includes
front and
rear doors

8.00 in.

6.00 in.

24.02 in.

42.00 in.

Service area

42.00 in.

Service area

Floor tiles
24 in. sq.

Storage bay

DLm4080 configuration floor cutouts

Figure 6 DLm4080 configuration floor cutout.

Figure 6 on page 47 illustrates the configuration and the

recommended floor tile cutouts for the seven-bay DLm configuration.
The illustrations assume that the floor tiles are 24 x 24 in. (61 x 61 cm).

When planning the DLm placement for DLm4080, ensure that:

◆ The storage bays are positioned on either side of the system and

the expansion storage bay.

◆ The optional expansion storage bay is positioned next to the

system bay.

In a nonraised floor environment, ensure that the room meets
environmental specification requirements. See “Environmental data”

Placement options

on page 39.

47

System Placement

GEN-000000

Front

2.55 in.

(6.48 cm)

1.50 in.

(3.81 cm)

1.50 in.

(3.81 cm)

Rear caster

swivel 0.75 in.

(1.90 cm)

any direction (2)

Front caster

fixed (2)

4.19 in.

(10.64 cm)

0.87 in.

(2.21 cm)

3.74 in.
(9.50 cm)

4.88 in.
(12.40 cm)

Floor tile

cutout

Leveling

foot

0.90 in.

(2.29 cm)

Caster

2.55 in.

(6.48 cm)

Figure 7 on page 48 illustrates Caster and leveler dimensions.

48

Figure 7 Caster and leveler dimensions

EMC Disk Library for mainframe Physical Planning Guide

5

Power Requirements

This chapter describes the power requirements for the DLm system
configurations. The procedures for connecting customer power to the
system are also covered.

The major topics are:

◆ DLm power requirements................................................................. 50

◆ DLm touch current compliance ....................................................... 59

◆ Regulatory compliance...................................................................... 60

◆ Choosing a UPS.................................................................................. 61

Power Requirements

49

Power Requirements

DLm power requirements

This section describes the North American electrical specifications,
power cables, connectors, and extension cords for a DLm
configuration.

Table 11 on page 50 summarizes power requirements specific to a

single bay.

Tab le 11 North American, single-phase, electrical specifications

Specification Requirement

Input voltage 200 V AC to 240 V AC -10%/+10% single-phase

Frequency 50 Hz to 60 Hz

Circuit breakers 30 A

Power zones Two

Power requirements at customer site (for each bay)
DLm960/120

Power requirements at customer site (for each bay)
DLm4080/4020

Power distribution panel connectors NEMA L6-30P

Four single-phase drops for:

• NAS bay

• NAS extension bay
Two single-phase drops for:

•VTEC bay

• Storage bay

• DLm120 bay

Four single-phase drops for:

• Storage bay (with more than nine DAEs)

• Extension storage bay
Two single-phase drops for:

• Storage bay (with up to nine DAEs)

• System bay

• DLm4020 bay

Facility power mating receptacle is L6-30R or HBL2621

Before delivery, the customer must supply and install the required
receptacles to zone A and zone B power for the DLm bays. Figure 8

on page 51, Figure 9 on page 52 and Figure 10 on page 53 show the

required power cabling for these systems.

50

EMC Disk Library for mainframe Physical Planning Guide

Power Requirements

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

Power
source A

GEN-001127

Power

source B

(extension cables)

Master

switch

PDP APDP B

Master
switch

Figure 8 Power distribution cabling — DLm120 and DLm4020

DLm power requirements

51

Power Requirements

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF

O

ON

I

OFF

O

ON

I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

Powe r
source A

CL4258

Powe r

source B

Powe r
source A

Powe r
source C

Powe r

source D

Extension cables

Powe r

source B

Master switch

Master switch

PDP APDP B PDP APDP B

PDP CPDP D

PDP CPDP D

Master

switch

Master

switch

Master
switch

Master
switch

Extension cables

NAS and NAS expansion bays

VTEC and storage bays

52

Figure 9 Power distribution cabling —DLm960

EMC Disk Library for mainframe Physical Planning Guide

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF

O

ON

I

OFF

O

ON

I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON

I

OFF
O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

ON
I

OFF

O

Powe r
source A

CL0000

Powe r

source B

Powe r
source A

Powe r
source C

Powe r

source D

(Extension cables) (Extension cables)

Powe r

source B

Master switch

Master switch

PDP APDP B PDP APDP B

PDP CPDP D

PDP CPDP D

Master

switch

Master

switch

Master
switch

Master
switch

Storage and expansion storage bay System bay

Power Requirements

Figure 10 Power distribution cabling — DLm4080

DLm power requirements

53

Power Requirements

Single-phase power extension cords and connectors

Each DLm bay has four single-phase power distribution panel (PDP)
assemblies and four power distribution units (PDU).

DLm960 NAS bay and NAS expansion bay require four power drops.
The DLm4080 expansion storage bay and DLm4080 storage bay with
more than nine DAEs. DLm4080 storage bay with upto nine DAEs
requires two power drops.

These bays require two power drops each:

◆ The DLm120 bay

◆ The DLm960 VTEC bay

◆ The DLm960 Storage bays

◆ The DLm4020 bay

◆ The DLm4080 storage bay with up to nine DAEs

For these bays, the upper PDUs are cabled to the lower PDPs in
manufacturing.

These bays require four power drops:

54

◆ The DLm960 NAS bay

◆ The DLm960 NAS expansion bay

◆ The DLm4080 system bay

◆ The DLm4080 expansion storage bay

◆ The DLm4080 storage bay with more than nine DAEs

Regardless of the number of power drops required, each DLm bay
comes with a DLm power kit that includes two 15-foot power cords
and two 21-foot power cords. Assuming a raised floor customer
setup, the 21-foot cords are used for the 2 upper PDPs, and the 15-foot
cords are used with the two lower PDPs.

EMC Disk Library for mainframe Physical Planning Guide

Power Requirements

L6-30R

P1 P2

Y

X

G

X

Y

G

L6-30P

Marker, Label ID

Electrical/Wiring Specification

180.0 in. +/- 6.0 in.
(457.2 cm)

Color From To Signal

GEN-001153

BLK P1-X P2-X L

WHT P1-Y P2-Y N

GRN P1-G P2-G GND

Figure 11 on page 55 shows Extension cables for North American

installations. Connector L6-30R connects to the DLm bay connector
L6-30P. Connector L6-30P on the other end of cable connects to a
customer-supplied L6-30R or HBL2621 coupler. EMC provides
similar cable sets with appropriate wiring and couplers for all
supported international installations.

Figure 11 EMC model number DLmP40U-60-US cable description

DLm power requirements

55

Power Requirements

Figure 12 on page 56 depicts the system wiring for DLm120, DLm960

VTEC bay, and the storage bays. Figure 13 on page 57 illustrates the
system wiring for DLm960 NAS and NAS Expansion bays.

Customer

PDU B

L

Location

N

G

Zone B

200-240 V AC

single-phase

50-60 Hz

DLm120

Customer

P
D
P

BA

P
D
P

P
D
P

P
D
P

PDU A

L

N

Location

G

Zone A

200-240 V AC

single-phase

50-60 Hz

GEN-001148

Figure 12 DLm120 bay, DLm960 VTEC, and storage bays single-phase cabling

56

EMC Disk Library for mainframe Physical Planning Guide

Power Requirements

Customer

PDU B

Customer

PDU A

Zone B

200-240 V AC

single-phase

50-60 Hz

Zone A

200-240 V AC

single-phase

50-60 Hz

DLm 960

GEN-001147

Location

Location

BA

L

N

G

L

N

G

Location

Location

30A

circuit

breakers

LG-30R

connectors

30A

circuit

breakers

LG-30R

connectors

D

C

L

N

G

L

N

G

P
D
P

P
D
P

P
D
P

P
D
P

Customer

PDU B

Zone B

200-240 VAC

single-phase

50-60 Hz

Zone A
200-240 VAC
single-phase

50-60 Hz

DLm4020

CL4247

Location

Location

BA

L

N

G

L

N

G

P
D
P

P
D
P

P
D
P

P
D
P

Customer

PDU A

Figure 13 DLm960 NAS and NAS expansion bays single-phase cabling

Figure 14 on page 57 depicts the system wiring for the DLm4020 bay

and the DLm4080 system bay.

Figure 14 DLm4020 single-phase cabling

DLm power requirements

57

Power Requirements

Customer

PDU B

Customer

PDU A

Zone B

200-240 VAC

single-phase

50-60 Hz

Zone A
200-240 VAC
single-phase

50-60 Hz

DLm4080

CL0000

Location

Location

BA

L

N

G

L

N

G

P
D
P

P
D
P

P
D
P

P
D
P

Customer

PDU B

Customer

PDU A

Zone B

200-240 VAC

single-phase

50-60 Hz

Zone A
200-240 VAC
single-phase

50-60 Hz

DLm4080

GEN-001208

Location

Location

BA

L

N

G

L

N

G

Location

LG-30R

Connectors

LG-30R

Connectors

30A

circuit

breakers

30A

circuit

breakers

Location

DC

L

N

G

L

N

G

P
D
P

P
D
P

P
D
P

P
D
P

Figure 15 on page 58 depicts the system wiring for DLm4080 system

and storage bays (with up to nine DAEs) and Figure 16 on page 58
depicts the system wiring for DLm4080 storage (with more than nine
DAEs) and expansion storage bays.

Figure 15 DLm4080 system and storage bays single-phase cabling

58

Figure 16 DLm4080 expansion storage and storage bays single-phase cabling

EMC Disk Library for mainframe Physical Planning Guide

DLm touch current compliance

CAUTION

!

DLm is designated as a fixed (stationary) electrical equipment with
high earth-leakage markings. Connect the cabinets to the customer
AC supply with the recommended rated current breakers and the
attached cables. “DLm power requirements” on page 50 provides
details of recommended circuit breaker ratings. These recommended
breaker ratings are based on the maximum kW loading of the cabinet
and not on the KVA figures of a particular configuration. The KVA
values listed in this manual are intended for air conditioning and
utility loading purposes only. “Power and cooling data” on page 41
contains more information.

Do not connect the DLm VTEC bay power supplies on separate
Main and Auxiliary circuit panels to differential trip devices. These
devices are typically called Ground Fault Circuit Interrupter
(GFCI), Ground Fault Interrupter (GFI), Earth Leakage Circuit
Breaker (ELCB), or Residual Current Circuit Breakers.

Power Requirements

Because DLm systems are high earth-leakage devices, differential trip
devices (typically 30 mA) are not recommended due to random
activation during utility feed distortions and power line transients
interacting with the cabinet noise filters. These differential devices
have trip ratings of 5 mA to 500 mA and are mostly intended for
consumer goods rather than fixed devices.

If the DLm cabinet is correctly grounded to the customer’s AC power
source, leakage current will not produce a voltage leading to
electrical shock. Serious insulation breakdowns will trip the breakers
feeding the cabinet or, preferably first clear fuses in individual
internal modules closest to the fault.

DLm touch current compliance

59

Power Requirements

Regulatory compliance

DLm meets regulatory requirements as referenced by the following
UL/IEC/EN 60950 3rd Edition:

5.1.7 Equipment with touch (leakage) current exceeding 3.5mA.

For Stationary Permanently Connected Equipment, or Stationary
Pluggable Equipment Type B, having a main protective earthing
terminal, if the Touch (Leakage) Current measurements exceed 3.5mA
r.m.s., following conditions apply:

• The r.m.s. Protective Conductor Current will not exceed five percent
of the input current per line under normal operating conditions. If
the load is unbalanced, the largest of the single-phase currents shall
be used for this calculation.

To measure the Protective Conductor Current, the procedure for
measuring Touch Current is used, but the measuring instrument is
replaced by an ammeter of negligible impedance.

• The cross-sectional area of the Protective Bonding Conductor will
not be less than 1.0 mm squared in the path of high Protective
Conductor Current.

• A label with similar wording shall be affixed adjacent to the
equipment AC MAINS SUPPLY connection:

HIGH LEAKAGE CURRENT

Earth connection essential
before connecting supply.

60

The DLm configurations are Stationary Pluggable Type B systems,
and have been extensively tested and certified to meet the above
standard, including the application of the warning label, EMC P/N
046-000-309, in English and French. The label location for the DLm
configuration is on the inside of the front door.

EMC Disk Library for mainframe Physical Planning Guide

Choosing a UPS

Power Requirements

The VTEC and Storage Controllers (Data Movers) are stateless, so no
battery backup is required. In the event of a power failure, the
Storage Processor writes contents of the write cache to disk, before
shut down. Although DLm does not require a battery backup to
ensure data integrity, to avoid potential downtime, purchase a UPS
from a qualified vendor.

EMC neither offers nor recommends any specific UPS suppliers or
product type to its customers. However EMC uses preferred
suppliers for UPS systems in their facilities. Therefore, if you, the
customer, are implementing a UPS, EMC recommends the following:

◆ When you are planning the UPS solution for a DLm and the host

system is presently (or will potentially be) protected with a UPS,
the battery backup time you propose for the DLm UPS solution
should match that of the host system.

◆ The DLm requires independent zone B and zone A power feeds

for each bay.

◆ The UPS should be equipped with an internal output isolation

transformer.

◆ The UPS should be installed as a separately derived AC source

using neutral and ground wiring to preserve the fault tolerance
specification of the DLm power system.

◆ Depending on the power requirements for your DLm system

operation, an isolation transformer/stabilizer installed in front of
the UPS could further buffer the AC utility environmental factors
from reaching DLm. To determine if an isolation
transformer/stabilizer is needed, consult a licensed electrician.

Choosing a UPS

61

Power Requirements

62

EMC Disk Library for mainframe Physical Planning Guide

Index

C

cabling requirements 22
Comments 16

D

DLm

environmental specifications 37
Modems 30
power requirements 50
product introduction 26, 28

DLm120

DAE 27
overview 26
placement options 45
system 26

DLm4020 31

DAE 32
Placement options 45
System bay 31

DLm4080

configuration floor cutouts 47
Storage bay 34
System bay 33

DLm960

configuration floor cutouts 47
DAE 29
NAS bay 29
NAS expansion bay 29
overview 28
VTEC bay 28

E

EMC Customer Support Representative 18
EMC Sales and Customer Support 13
environment acclimation 39
environmental data 39

H

heat dissipation 41

I

installation information 36
international shipments 21

O

other considerations

environmental specifications 22
layout and space recommendations 22
system host cabling requirements 22

overview 31

P

physical and environmental specifications 37
physical data 38
placement options 44

expansion storage bay 47
NAS expansion bay 44
solid floor or raised floor 44
storage bay 47
The NAS bays 44
VTEC bay 44

planning overview 18

EMC Disk Library for mainframe Physical Planning Guide

63

Index

airflow and ventilation 18
controlled temperature 18
fire equipment 18
humidity 18

power and grounding 18
power consumption 41
power requirements 49

choosing a UPS 61

regulatory compliance 60
Preface 13
pre-installation responsibility 18
presite considerations 19

DLm120 19

DLm960 19

general considerations 20

other requirements 20

physical specifications 21

transportation and delivery guidelines 21

R

remote support 22

S

system configuration and host connectivity 25
System host cabling

ESCON 22

FICON 22
system placement 43

64

EMC Disk Library for mainframe Physical Planning Guide