SATA Connectivity over Fibre Channel Ken Hirata, Emulex 1 - - PowerPoint PPT Presentation

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SATA Connectivity over Fibre Channel

Ken Hirata, Emulex

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Next Generation Back Ends: Tiered Storage

Next Generation Enclosures Next Generation Storage Controller

FC 4 G FC 1 G FC 2 G FC 8 G

Enterprise Near line

LC FC 2 G

FC I OC FC I OC

FC Sw itch SATA 6 G SATA 3 G SATA 1 .5 G

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The Problem

Tiered storage systems are becoming the enterprise standard

Performance tier is predominantly Fibre Channel / SCSI Nearline tier has chosen SATA

SATA and Fibre Channel disk drives are not easily integrated into Fibre

Channel based enterprise storage systems

Costly to replace and/or re-architect existing FC systems Requires multiple skill sets to maintain Impacts reliability with additional bridges and components

The Solution

Leverage the universal transport nature of Fibre Channel by… Encapsulating SATA FIS’s as standard FC payloads and tunneling them

• ver FC infrastructure to…

Integrate low cost SATA storage into existing Fibre Channel enterprise

storage systems!

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FC-SATA

Fibre Channel SATA tunneling

Encapsulates SATA FIS as standard FC payload Attaches SATA drive shelves via FC infrastructure Integrates SATA drives with enterprise FCP/SCSI storage in a single

infrastructure.

Provides the same function as SAS/STP

BUT uses the mature FC infrastructure technology

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FC-SATA Ecosystem & Function

• Connects SCSI/FCP drive shelves and

SATA drive shelves through the same FC infrastructure

• Encapsulates requests to SATA drives

as FC-4 payloads and routes them through FC infrastructure

• Routes requests to SCSI drives using

standard FCP

SATA and FCP Drives

Tunneled SATA and Passthru FCP

Existing Fibre Channel Infrastructure Enclosures with Fibre Channel AND / OR SATA Drives Existing FC IOC with firmware enhancements

FCP/SCSI Drives

FAST Based Storage Legacy FCP Based Storage

SATA Drives

SATA Storage Tunneled Over FC

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Today’s Fibre Channel Storage

Server Server Server RAID

SCSI FCP FCP

Switch

FCP FCP

SCSI Storage Shelf

SCSI SCSI

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SATA Storage Shelf

FC-SATA Fibre Channel Storage- 1

SCSI FCP FCP

SCSI payloads map to SATA FIS, wrap in FC-SATA

SATA FIS FC-SATA SATA FIS

Server Server Server FAST RAID Switch

FCP FCP SCSI FCP SCSI

SCSI Storage Shelf

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SATA Storage Shelf

FC-SATA Fibre Channel Storage- 2

map to SATA FIS, wrap in FC-SATA

SATA FIS FC-SATA

Virtualize, or simply pass through

SATA FIS FC-SATA

Server Server Server FAST RAID Switch

FCP FCP SCSI ATA SATA FIS SATA FIS FC-SATA

FC-SATA payloads

FCP SCSI

SCSI Storage Shelf

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FC-SATA Benefits

Protects investments by

Leveraging existing FC infrastructure

Lowers System cost

Enables use of lower cost components

Decreases time to market by

Leveraging existing FC infrastructure Leveraging existing drive technology for all tiers

SCSI and/or SATA storage all with one interconnect

Leverages field proven Fibre Channel interconnect

Stability Efficiencies Scalability Reliability

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FC-SATA Benefits

Provides choice of SATA system interfaces

SATA drives presented as SCSI

Deployment without major changes to RAID code base All translations confined within the RAID controller New storage features can be used without changes to the shelves Uses T10 specified SCSI/ATA translation

SATA drives presented as ATA

No translation of commands No need to mask errors in SCSI

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FC-SATA Next Steps

Create a standard!

Study group has been authorized in T11 Review concept with T13 (today) Finalize T11 Project Proposal in study group (early May 2005) Approve T11 Project Proposal (June 2005)