EMC CX700 Technical manual

EMC Corporation
Corporate Headquarters :
Hopkinton, MA 01748 -9103
1 -508 -435 -1000
www.EMC.com
EMC CLARiiON
CX300, CX500, CX500i, and CX700 Storage Systems
CONFIGURATION PLANNING GUIDE
P/N 300-001-273
REV A04

EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
ii
Copyright © 2003, 2004 EMC Corporation. All rights reserved.
Published November, 2004
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.
Trademark Information
EMC2, EMC, CLARiiON, Navisphere, PowerPath, and Symmetrix are registered trademarks and Access Logix, FLARE, MirrorView, Powerlink,
SAN Copy, SnapView, and TimeFinder are trademarks of EMC Corporation.
All other trademarks used herein are the property of their respective owners.

EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
iii
Preface............................................................................................................................. ix
Chapter 1 About CX300, CX500, CX500i, and CX700 Storage
Systems
Introducing CX300, CX500, CX500i, and CX700 Storage
Systems.............................................................................................. 1-2
Fibre Channel .................................................................................. 1-4
Fibre Channel Storage Components ...................................... 1-5
Storage Component (Storage System Enclosures)............... 1-8
iSCSI ................................................................................................ 1-10
iSCSI Storage Components.................................................... 1-10
Initiator Components ............................................................. 1-11
LAN Components................................................................... 1-11
Target Components................................................................ 1-12
Types of Storage-System Installations ........................................ 1-13
About Switched Shared Storage and SANs (Storage Area
Networks) ....................................................................................... 1-14
Storage Groups........................................................................ 1-15
Chapter 2 RAID Types and Trade-offs
Introducing RAID ............................................................................ 2-2
Disk Striping.............................................................................. 2-2
Mirroring.................................................................................... 2-2
RAID Groups and LUNs ......................................................... 2-3
RAID Types....................................................................................... 2-4
RAID 5 Group (Individual Access Array) ............................ 2-4
RAID 3 Group (Parallel Access Array).................................. 2-5
Contents

EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
iv
Contents
RAID 1 Mirrored Pair .............................................................. 2-7
RAID 1/0 Group (Mirrored RAID 0 Group)........................ 2-8
RAID 0 Group (Nonredundant Array) ............................... 2-10
Individual Disk Unit .............................................................. 2-10
Hot Spare ................................................................................. 2-11
RAID Benefits and Trade-offs ...................................................... 2-13
Performance ............................................................................ 2-14
Storage Flexibility................................................................... 2-15
Data Availability and Disk Space Usage............................. 2-16
Guidelines for RAID Groups ....................................................... 2-18
Sample Applications for RAID Types......................................... 2-20
Chapter 3 Storage-System Management
Management Ports .......................................................................... 3-2
Navisphere Management Suites.................................................... 3-4
Access Logix Software ............................................................. 3-4
Navisphere Manager................................................................ 3-5
Navisphere Host Agent and CLI............................................ 3-5
Navisphere Analyzer ............................................................... 3-5
Navisphere Integrator.............................................................. 3-5
Using Navisphere Software ........................................................... 3-6
Navisphere Management Worksheet.................................... 3-8
Chapter 4 Data Replication and
Data Mobility Software
Data Replication and Data Mobility Software Overview.......... 4-2
What Is SnapView?.......................................................................... 4-3
Clones Overview and Example.............................................. 4-3
Snapshots Overview and Example........................................ 4-5
Clone and Snapshot Trade-offs .............................................. 4-7
SnapView Worksheets............................................................. 4-8
What Is MirrorView?..................................................................... 4-11
MirrorView Example ............................................................. 4-11
MirrorView Features and Benefits....................................... 4-13
MirrorView Planning Worksheet......................................... 4-15
What Is MirrorView/A? ............................................................... 4-17
MirrorView/A Example........................................................ 4-18
MirrorView/A Features and Benefits ................................. 4-19
MirrorView/A Planning Worksheets ................................. 4-22
What Is EMC SAN Copy? ............................................................ 4-24

v
EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
Contents
SAN Copy Example............................................................... 4-26
SAN Copy Features and Benefits ........................................ 4-27
Implementing SAN Copy Over Extended Distances ....... 4-28
SAN Copy Planning Worksheet .......................................... 4-30
Chapter 5 Planning File Systems and LUNs
Multiple Paths to LUNs.................................................................. 5-2
Disk IDs ............................................................................................ 5-2
Sample Shared Switched Installation........................................... 5-2
Sample Unshared Direct Installation ........................................... 5-5
Planning Applications, LUNs, and Storage Groups .................. 5-6
Application and LUN Planning............................................. 5-7
LUN and Storage Group Planning Worksheet.................... 5-9
LUN Details Worksheet........................................................ 5-14
Chapter 6 Storage-System Hardware
Storage-System Installation Types................................................ 6-2
Hardware for CX300, CX500, CX500i, and CX700 Storage
Systems ............................................................................................. 6-3
Storage Hardware.................................................................... 6-3
Storage Processor (SP)............................................................. 6-5
Disks........................................................................................... 6-7
Planning Your Hardware Components ....................................... 6-8
Components for Storage Systems.......................................... 6-8
Hardware Dimensions and Requirements .................................. 6-9
Cabinets for Enclosures................................................................ 6-10
Fibre Channel Data Cable and Configuration Guidelines ...... 6-11
Fibre Channel Front-End Hardware Planning Worksheets .... 6-12
Chapter 7 iSCSI Configuration
Storage System iSCSI Data Port Worksheet ............................... 7-2
iSCSI Initiator Port Worksheet ..................................................... 7-3
Index ............................................................................................................................... i-1

EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
vi
Contents

EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
vii
1-1 CX700 Storage System .................................................................................. 1-3
1-2 Nodes - Initiator and Target ........................................................................ 1-4
1-3 Switch and Point-to-Point Connections ..................................................... 1-6
1-4 A Switch Zone ................................................................................................ 1-7
1-5 Typical 16-Port Switch, Back View ............................................................. 1-7
1-6 CX700 Storage Processor Enclosure (SPE) ................................................. 1-8
1-7 Nodes - Initiator and Target ...................................................................... 1-10
1-8 Switch and Point-to-Point Connections ................................................... 1-11
1-9 Types of Storage-System Installation ....................................................... 1-13
1-10 Components of a SAN ................................................................................ 1-14
1-11 Sample Shared Storage Configuration ..................................................... 1-16
1-12 Data Access Control with Shared Storage ............................................... 1-17
2-1 Multiple LUNs in a RAID Group ................................................................ 2-3
2-2 RAID 5 Group ................................................................................................ 2-5
2-3 RAID 3 Group ................................................................................................ 2-6
2-4 RAID 1 Mirrored Pair ................................................................................... 2-8
2-5 RAID 1/0 Group ........................................................................................... 2-9
2-6 How a Hot Spare Works ............................................................................ 2-12
2-7 Disk Space Usage in the RAID Configuration ........................................ 2-17
3-1 Storage Domains on the Internet ................................................................ 3-7
4-1 Clones Example ............................................................................................. 4-4
4-2 Snapshot Example ......................................................................................... 4-6
4-3 Sample MirrorView Configuration .......................................................... 4-12
4-4 Sample Remote Mirror Configuration ..................................................... 4-19
4-5 Sample SAN Copy Sessions Between Storage Systems ......................... 4-26
4-6 Sample SAN Copy Over IP Configuration .............................................. 4-29
5-1 Sample Shared Switched Storage Configuration ...................................... 5-3
5-2 Unshared Direct Storage System ................................................................ 5-5
6-1 Types of Fibre Channel Storage-System Installations ............................. 6-2
6-2 CX700 Storage System .................................................................................. 6-4
Figures

EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
viii
Contents
6-3 Shared Storage Systems ............................................................................... 6-5
6-4 Disks and Their IDs ...................................................................................... 6-7

EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
ix
Preface
As part of an effort to improve and enhance the performance and capabilities
of its product line, EMC from time to time releases revisions of its hardware
and software. Therefore, some functions described in this guide may not be
supported by all revisions 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 guide, please contact your EMC representative.
About this Manual This planning guide introduces EMC®CLARiiON®CX300, CX500,
CX500i, and CX700 disk-array storage systems and offers useful
background information and worksheets to help you plan.
Audience Read this guide
◆if you are considering purchase of a CX300, CX500, CX500i, or
CX700 disk-array storage system and want to understand its
features; or
◆before you plan the installation of a storage system.
You should be familiar with the host servers that will use the storage
systems and with the operating systems on the servers. After reading
this guide, you will be able to
◆Determine the best storage-system components for your
installation
◆Determine your site requirements
◆Configure storage systems correctly

x
EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
Preface
Organization This manual is organized as follows:
Conventions Used in
This Guide EMC uses the following conventions for notes and cautions.
A note presents information that is important, but not hazard-related.
CAUTION
!
A caution contains information essential to avoid data loss or
damage to the system or equipment. The caution may apply to
hardware or software.
Chapter 1 Provides background information about Fibre Channel
and iSCSI features and explains the major types of
storage.
Chapter 2 Describes the RAID Groups and the different ways they
store data.
Chapter 3 Explains storage management software.
Chapter 4 Describes the optional EMC storage-system based
applications for replicating data or copying data within
or between CLARiiON storage systems:
◆EMC SnapView™ software for replicating data with
a storage system using snapshots or clones.
◆EMC MirrorView™ and EMC
MirrorView/Asynchronous remote mirroring
software for replicating data between storage
systems.
◆EMC SAN Copy ™ software for creating clones and
snapshots within a storage system.
Chapter 5 Helps you plan your storage-system file systems and
LUNs.
Chapter 6 Describes the hardware components of storage systems.
Chapter 7 Explains how to configure CX500i iSCSI storage systems.

EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
xi
Preface
Finding Current
Information The most up-to-date version of this manual is posted on the EMC
Powerlink™website. We recommend that you download the latest
version before you plan the installation of a storage system.
To access EMC Powerlink, use the following link:
http://powerlink.emc.com
After you log in, select Support > Document Library.
Where to Get Help For questions about technical support, call your local sales office or
service provider.
If you have a valid EMC service contract, contact EMC Customer
Service at:
Follow the voice menu prompts to open a service call and select the
applicable product support.
Sales and Customer
Service Contacts For the list of EMC sales locations, please access the EMC home page
at:
http://www.EMC.com/contact/
For additional information on the EMC products and services
available to customers and partners, refer to the EMC Powerlink
website at:
http://powerlink.EMC.com
Your Comments Your suggestions will help us continue to improve the accuracy,
organization, and overall quality of the user publications. Please send
a message to t[email protected] with your opinions of
this guide.
United States: [phone] (SVC-4EMC)
Canada: [phone] (543-4SVC)
Worldwide: [phone]

xii
EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
Preface

About CX300, CX500, CX500i, and CX700 Storage Systems
1-1
1
Invisible Body Tag
This chapter introduces CLARiiON® CX300, CX500, CX500i, and
CX700 disk-array storage systems and storage area networks (SANs).
Major sections are
◆Introducing CX300, CX500, CX500i, and CX700
Storage Systems..................................................................................1-2
◆Fibre Channel......................................................................................1-4
◆iSCSI...................................................................................................1-10
◆Types of Storage-System Installations...........................................1-13
◆About Switched Shared Storage and SANs (Storage Area
Networks)..........................................................................................1-14
About CX300, CX500,
CX500i, and CX700
Storage Systems

1-2
EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
About CX300, CX500, CX500i, and CX700 Storage Systems
Introducing CX300, CX500, CX500i, and CX700 Storage Systems
EMC CLARiiON CX300, CX500, CX500i, and CX700 disk-array
storage systems provide terabytes of disk storage capacity, high
transfer rates, flexible configurations, and highly available data at
low cost. Their hardware RAID features are provided by two storage
processors (SPs).
Table 1-1 outlines each storage system enclosure and disk capacities.
Table 1-1 Storage System Enclosures and Disk Capacities
Two types of DAE2s are available:
◆a standard DAE2 version with high-performance Fibre Channel
disks
◆a DAE2-ATA version with economical ATA (Advanced
Technology Attachment) disks.
Figure 1-1 shows a typical CX700 storage system.
Storage System Enclosure Type Number of Disks per Storage System Enclosure
Maximum Number of 2-Gigabit
Disk-Array Enclosures (DAE2s)aand
Disks
a. Each DAE2 enclosure has slots for 15 disks.
CX300 2-Gbit Disk Processor
Enclosure (DPE2) 15 Fibre Channel disks 3 separate DAE2s for a total of 60 disks
CX500 & CX500i 2-Gbit Disk Processor
Enclosure (DPE2) 15 Fibre Channel disks 7 separate DAE2s for a total of 120 disks
CX700 Storage Processor
Enclosure (SPE) An SPE does not include disks, and requires at least one 2-Gbit
Disk-Array Enclosure (DAE2)
with Fibre Channel disks.
16 separate DAE2s for a total of 240 disks

Introducing CX300, CX500, CX500i, and CX700 Storage Systems
1-3
About CX300, CX500, CX500i, and CX700 Storage Systems
Figure 1-1 CX700 Storage System
A storage-system package includes storage management software,
Fibre Channel interconnect hardware, and one or more storage
systems. The host bus adapter driver hardware and software are
available from outside vendors.
Rackmount
Cabinet
SPS
DAE2s
EMC2737
SPE

1-4
EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
About CX300, CX500, CX500i, and CX700 Storage Systems
Fibre Channel
Fibre Channel is a high-performance serial protocol that allows
transmission of both network and I/O channel data. It is a low level
protocol, independent of data types, and supports such formats as
SCSI and IP.
The Fibre Channel standard supports several physical topologies,
including switch fabric point-to-point and arbitrated loop (FC-AL).
The Fibre Channel storage systems described in this manual use
switch fabric and FC-AL topologies.
A switch fabric is a set of point-to-point connections between nodes;
each connection is made through one or more Fibre Channel
switches. Each node may have its own unique address, but the path
between nodes is governed by a switch. The nodes are connected by
optical cable.
A Fibre Channel arbitrated loop is a circuit consisting of nodes. Each
node has a unique address, called a Fibre Channel arbitrated loop
address. The nodes connect with optical cables. An optical cable can
transmit data over great distances for connections that span entire
enterprises and can support remote disaster recovery systems.
Each connected device in a switched fabric or arbitrated loop is a
server adapter (initiator) or a target (storage system). The switches
are not considered nodes.
Figure 1-2 shows a node and initiator.
Figure 1-2 Nodes - Initiator and Target
EMC1802
Server Adapter (Initiator)
Connection
Storage System (Target)
Node
Adapter
Node

Fibre Channel
1-5
About CX300, CX500, CX500i, and CX700 Storage Systems
Fibre Channel Storage Components
A Fibre Channel storage system has three main components:
◆Server component (host bus adapter driver with adapter and
software)
◆Interconnect components (cables based on Fibre Channel
standards, and switches)
◆Storage component (storage system with storage processors,
power supply, cooling hardware, and disks)
Server Component (Host Bus Adapter and Driver)
The host bus adapter is a printed-circuit board that slides into an I/O
slot in the server’s cabinet. It transfers data between server memory
and one or more disk-array storage systems over Fibre Channel — as
controlled by the support software (adapter driver).
Interconnect Components
The interconnect components include the optical cables between
components and any Fibre Channel switches.
The maximum length of optical cable between a CX300, CX500, and
CX700 storage system and a server or switch ranges from 150 to 500
meters (165 to 550 yards), depending on the type of cable and
operating speed. With extenders, connections between servers,
switches, and other devices can span up to 60 kilometers (36 miles) or
more. This ability to span great distances ia a major advantage of
optical cable.
Details on cable lengths and rules appear later, in Chapter 6.
Fibre Channel Switches
A Fibre Channel switch, which is required for switched shared
storage (a storage area network, SAN), connects all the nodes cabled
to it using a fabric topology. A switch adds serviceability and
scalability to any installation; it allows online insertion and removal
of any device on the fabric and maintains integrity if any connected
EMC1803
Adapter Adapter
Server

1-6
EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
About CX300, CX500, CX500i, and CX700 Storage Systems
device stops participating. A switch also provides
server-to-storage-system access control and point-to-point
connections.
Figure 1-3 Switch and Point-to-Point Connections
You can cascade switches (connect one switch port to another switch)
for additional port connections.
Switch Zoning
Switch zoning lets an administrator define paths between connected
nodes based on the node’s unique World Wide Name. Each zone
includes a server adapter and/or one or more SPs. EMC recommends
single-initiator zoning, which limits each zone to a single HBA port
(initiator). The current connection limits are outlined in Table 1-2.
EMC1805
Adapter
Server
Adapter
Server
Adapter
Server
Storage System
SP SP
Storage System
SP SP
Table 1-2 Connection Limits
Storage System Maximum HBA Ports per SP Maximum HBA Ports per Storage System
CX300 32 128
CX500 64 256
CX700 64 512

Fibre Channel
1-7
About CX300, CX500, CX500i, and CX700 Storage Systems
In Figure 1-4, Server 1 has access to one SP in storage systems 1 and 2;
it has no access to any other SP.
Figure 1-4 A Switch Zone
To illustrate switch zoning, Figure 1-4 shows just one HBA per server
and one switch. Normally, such installations include multiple HBAs
per server and two or more switches.
If you do not define a zone in a switch, all adapter ports connected to
the switch can communicate with all SP ports connected to the
switch. However, access to an SP does not necessarily provide access
to the SP’s storage. Access to storage is governed by the Storage
Groups you create (explained in Storage Groups on page 1-15.
Fibre Channel switches are available with 8, 16, 32, or more ports.
They are compact units that fit into a rackmount cabinet.
Figure 1-5 Typical 16-Port Switch, Back View
Zone
Server 1 Server 2 Server 3
Storage System 1
SP
Storage System 2
SP
Storage System 3
SP SP
Switch
EMC1806
SP SP
Adapter
Adapter
Adapter
EMC1807
Ports

1-8
EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
About CX300, CX500, CX500i, and CX700 Storage Systems
If your servers and storage systems will be far apart, you can place
the switches closer to the servers or storage systems, as convenient.
A switch is technically a repeater, not a node, in a Fibre Channel loop.
However, it is bound by the same cabling distance rules as a node.
Storage Component (Storage System Enclosures)
EMC CX300, CX500, and CX700 disk-array storage systems, with
their storage processor (SPs), power supplies, and cooling hardware
form the storage component of a Fibre Channel system. The
controlling unit is a CX300 or CX500 disk processor enclosure (DPE2)
or a CX700 storage processor enclosure (SPE). A CX700 SPE, outside
of its cabinet, is shown in Figure 1-6.
Figure 1-6 CX700 Storage Processor Enclosure (SPE)
Each CX300 (DPE2), CX500 (DPE2), and CX700 (SPE) has two SPs.
The number of ports for each SP varies between storage systems.
Table 1-3 lists the number of ports per SP for each system.
Table 1-3 Number of Storage System Ports per SP
EMC2434
Storage System Front End Ports Back End Ports
CX300 2 1
CX500 2 2
CX700 4 4