1.introduction to storage infrastructure

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Introduction to Stora e

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Infrastructure


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Typical SAN Setup

LINUX Servers with Qlogic/ Emulex HBAs

SunFire V240with Qlogic HBAs

Windows server withQlogic / Emulex HBAs

McData / CNT switch

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IBM FastT200

FC-SANBrocade SAN Switch (3200) Brocade SAN Switch (3800)

Tape Library StorageTek /

QuantumLSI ProFibre JBOD

Serial ATA


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Interconnects

LINUX Servers with Qlogic/ Emulex HBAs

SunFire V240with Qlogic HBAs

Windows server withQlogic / Emulex HBAs

McData / CNT switch

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IBM FastT200

FC-SANBrocade SAN Switch (3200) Brocade SAN Switch (3800)

Tape Library StorageTek /

QuantumLSI ProFibre JBOD

Serial ATA


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Storage Networking Components cables & connectors

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Fiber Channel Copper cable: Uses electronicpulses to transmit Information down copper lines.

Fiber Optic Cable :Uses light pulses to transmitInformation down fiber lines.


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Single-mode fiber: Single-mode (SM) fiberallows for only one pathway, or mode, of

light to travel within the fiber. The core sizeis typically 8.3 m. (Designed for longertransmission distances up to 10km)

Multimode fiber: Multi-mode (MM) fiberallows more than one mode of light.

Common core sizes are 50 and 62.5 m.(Designed for short transmission distances

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up to 2km)

Note: Impossible to distinguish betweensingle-mode and multi-mode fiber with thenaked eye unless color coding schemes is

followedorange - multi-mode

yellow - single-mode.

Reference: http://www.arcelect.com/fibercable.htm

http://www.fiber-optics.info/articles/fiber-types.htm


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SC: The duplex SC connector is a low

loss, push/pull fitting connector. Offersexcellent packing density, and its push-pull design resists fiber end face contact

damage during connection.Use: Most GBICs and GLMs use industry

standard Subscriber Connector (SC)

connectors

Reference: http://www.fiber-optics.info/articles/connector-care.htm

LC The type of connectors which pluginto SFF or SFP devices are called LC

connectors. (Advantage over SC smallsize).

Use: Most of the 2 Gb/s devices will beusing the SFF or SFP technology, and

therefore, use Lucent Connector

(LC)connectors.


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GBICs, GLMs, and SFPsThese different components carry out the same task.

The task is that of converting electrical signals on HBAs, switches, and other

building blocks to and from optical or electrical signals for transmission over the

Fibre Channel media. The format of the devices is, however, different.

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Storage Networking Components - HBA

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Storage Networking Components Bridge and Gateway

Advantages of SAN Data Gateway versus a

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Switch Defers or completely avoids the high entry

cost of a switch.

Smaller configurations with fewer deviceslower administration cost for customer and

lower service/support cost for manufacture. Interoperability issues with switches: fabric

support is limited, resource sharingrequires middleware


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Storage Networking Components Switches

Typical fabric services provided

by a switch

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Name services

Fabric control

Time services

Automatic discovery and

registration of host and storagedevices

Rerouting of frames, ifpossible, in the event of a portproblem


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Various FC switch offerings

support both fabric and/or loop

connections. As the number of

devices increases, multiple

switches can be cascaded for

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expanded access.

Manufacturer: Cisco, Brocade,McData, Qlogic


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Reference:

www.snia.org/education/tutorials/2007/spring/storage/Storage_Protocol_Analyzers.pdf


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