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SATA Connectivity over Fibre Channel Ken Hirata, Emulex

SATA Connectivity over Fibre Channel Ken Hirata, Emulex. FC 8G. FC 4G. FC Switch. FC 2G. FC IOC. FC IOC. FC 1G. LC FC 2G. SATA 6G. SATA 3G. SATA 1.5G. Next Generation Back Ends: Tiered Storage. Next Generation Enclosures. Next Generation Storage Controller. Enterprise. Near line.

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SATA Connectivity over Fibre Channel Ken Hirata, Emulex

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  1. SATA Connectivity over Fibre ChannelKen Hirata, Emulex

  2. FC 8G FC 4G FC Switch FC 2G FC IOC FC IOC FC 1G LC FC 2G SATA 6G SATA 3G SATA 1.5G Next Generation Back Ends:Tiered Storage Next Generation Enclosures Next Generation Storage Controller Enterprise Near line

  3. 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 over FC infrastructure to… • Integrate low cost SATA storage into existing Fibre Channel enterprise storage systems!

  4. 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

  5. Legacy FCP Based Storage Tunneled SATA and Passthru FCP FAST Based Storage SATA Storage Tunneled Over FC FCP/SCSI Drives SATA Drives SATA and FCP Drives FC-SATAEcosystem & 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 Existing FC IOC with firmware enhancements Existing Fibre Channel Infrastructure Enclosures with Fibre Channel AND / OR SATA Drives

  6. SCSI Storage Shelf FCP FCP Server Server Server SCSI SCSI Switch Today’s Fibre Channel Storage SCSI FCP FCP RAID

  7. SCSI Storage Shelf SCSI FC-SATA FCP Server Server Server FC-SATA SATA FIS Switch SATA Storage Shelf SCSI payloads map to SATA FIS, wrap in FC-SATA FC-SATA Fibre Channel Storage- 1 SCSI FCP SCSI FCP FCP FCP FAST RAID SATA FIS

  8. SCSI Storage Shelf SCSI FC-SATA FCP Server Server Server FC-SATA SATA FIS Switch SATA Storage Shelf FC-SATA SATA FIS FC-SATA SATA FIS FC-SATA payloads Virtualize, or simply pass through map to SATA FIS,wrap in FC-SATA FC-SATA Fibre Channel Storage- 2 SCSI FCP FCP FAST RAID ATA SATA FIS

  9. FC-SATABenefits • 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

  10. FC-SATABenefits • 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

  11. 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)

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