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Fibre Channel SAN Overview

An Overview of SAN and FibreChannel Concepts

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Objectives

After completing this discussion you willbe able to:

Define a SAN.

Describe the role of various hardware components of

a SAN.

Describe the differences between the FC Host Bus

Adapters in a Dell | EMC SAN.

Describe the three FC topologies.

Explain the benefit of path redundancy in a SAN.

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Introduction

What is a SAN?

Why use a SAN?

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SAN Components

Overview

Hardware Components

Software Components

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Overview

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Transceivers

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Gigabit Interface Converters

(GBICs)

Used in 1 Gb applications. Fiber Optic and Copper

DB-9

High Speed Serial

Data Connector (HSSDC)

Subscriber Connector (SC)

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Small Form-Factor Pluggables

(SFPs)

Used in 2 Gb applications. Fiber Optic and Copper

High Speed SerialData Connector-2 (HSSDC-2)

Lucent Connector (LC)

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Transceiver/Cable Matrix

Cable Connector GBIC SFP Cable

Copper

HSSDC

DB-9

HSSDC-2

OpticalSC

LC

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HBAs

Supported HBAs:

Host

System

Operating

System

HBA

Manufacturer

Host Bus

Dell Windows NT

Windows 2000

Emulex PCI/PCI

Express*

Linux Qlogic PCI/PCI

Express*

Netware Qlogic PCI/PCI

Express*

IBM AIX Emulex PCI

Sun Solaris Emulex PCI

HP HP-UX Agilent PCI

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Enclosures

Disk ProcessorEnclosure - DPE

Disk Array Enclosure- DAE

Has a RAID controller.

Can have enclosurescascaded from it.

Has battery backup toprotect data during

power failures.

Does not have a RAID

controller. Can have enclosures

cascaded from it.

Can be cascaded from

another enclosure

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Switches

Connects multiple FC devices.

Provides dedicated throughput between all ports.

Standard Switch services:

Name Server

Zone Server

Switch features:

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Name Server

Name Server stores 64-bit WWNs of attachedhosts and targets

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Zone Server

Allows grouping of FC hosts and targets.

Zoning conditions:

Only devices in the same zone can

communicate with each other.

Devices not included in a zone cannot

communicate with any other device.

A device can be in multiple zones but it willnot act as a bridge between zones.

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Zoning Example

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Bridges and Routers

An FC bridge translates between FibreChannel and another bus structure

(usually SCSI). Generally bridges

connect the SAN to one other device. An FC router is similar to an FC bridge

except, that it can interpret the protocols

and thus route communication betweenmultiple devices and the SAN.

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Cables

Copper cable 10 m maximum

cable length

Optical cables Multi mode 500 m

maximum cablelength

Single mode 10 kmmaximum cablelength

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Software

HBA Driver. Path Failover

Software.

Path Management

Software.

LUN MaskingSoftware.

Enclosure

ManagementSoftware.

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Topologies

There are 3 FC topologies:

Point-to-Point.

Arbitrated Loop (FC_AL).

Switched Fabric (FC_SW).

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Nodes & Ports

End point devices (HBAs or Enclosures) arecalled Nodes.

Nodes connect through ports.

Each port type has a name depending inmethod of connection and the device

connecting through the port.

N = Node

F = Fabric L = Loop

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Point-to-Point

Direct connection between 1 host and 1 target. Generally not considered a SAN.

Special case of a loop topology.

Uses NL Ports.

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Arbitrated Loop

Similar to a token ring.

One virtual circuit at a time.

Uses NL.

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Switched Fabric

Similar to arbitrated loop but can supportmultiple concurrent virtual circuits.

Requires a switch.

Uses F and/or FL ports.

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Redundant Paths Direct Attached

Redundant Paths

Both Paths Good

Redundant Paths

One Path Broken

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Redundant Paths Fabric Attached

Redundant Paths

Both Paths Good

Redundant Paths

One Path Broken

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FC SAN: What is a Fabric?

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What Does a SAN Do?

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Legacy Storage Connectivity: DAS

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Motivations for Networked Storage

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Basic Structure of a SAN

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SAN versus DAS

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Clarion Foundations

CLARIION RANGE AND

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CLARIION RANGE AND

COMPONENTS

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Flexible, High Availability Design

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CLARiiON CX Series

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Modular Building Blocks

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CLARiiON ATA

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CLARiiON Architecture

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CLARiiON ArchitectureIntroduction

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CLARiiON CX500 / CX500i

EMC UltraPoint Technology

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EMC UltraPoint Technology

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THEORY OF OPERATION

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Storage Processor Introduction

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Cache Memory

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Mirrored Write Caching

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Managing Write Cache

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Write Cache Protected by Vault

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Persistent Storage Manager (PSM)

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Data Units on a Disk

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Element Tips

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CLARiiON RAID Options

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Creating RAID Groups

Bi di LUN

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Binding a LUN

Bind Operation - Setting

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Bind Operation SettingParameters

St G

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Storage Groups

D i i St G

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Designing Storage Groups

t LUN

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metaLUNs

Advanced Availability: LUN

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Advanced Availability: LUNOwnership Model

Host Connectivity Redundancy

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Host Connectivity RedundancyPowerPath Failover Software

SOFTWARE AND MANAGEMENT

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SO G

ENVIRONMENT

FLARE O ti E i t

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FLARE Operating Environment

CLARiiON Management Options

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CLARiiON Management Options

EMC Navisphere Management

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p gSoftware

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