SATA Connectivity over Fibre Channel Ken Hirata, Emulex 1 T13/e05125r0 12 April 2005
Next Generation Back Ends: Tiered Storage Next Generation Enclosures FC 8 G Next Generation FC 4 G Storage Controller FC Sw itch FC 2 G FC I OC FC 1 G Enterprise FC I OC LC FC 2 G SATA 6 G SATA 3 G SATA 1 .5 G Near line 2 T13/e05125r0 12 April 2005
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! 3 T13/e05125r0 12 April 2005
FC-SATA � F ibre C hannel 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 4 T13/e05125r0 12 April 2005
FC-SATA Ecosystem & Function Connects SCSI/FCP drive shelves and � SATA drive shelves through the same FC infrastructure Existing FC IOC with firmware enhancements Encapsulates requests to SATA drives � as FC-4 payloads and routes them Legacy through FC infrastructure FAST FCP FCP/SCSI Drives Based Based Storage Storage Routes requests to SCSI drives using � standard FCP Existing Fibre Channel Infrastructure SATA Storage SATA Drives Tunneled Over FC Enclosures with Fibre Channel AND / OR SATA Drives Tunneled SATA SATA and FCP Drives and Passthru FCP 5 T13/e05125r0 12 April 2005
Today’s Fibre Channel Storage SCSI Server FCP FCP FCP SCSI SCSI Storage FCP Shelf Server SCSI Switch RAID Server 6 T13/e05125r0 12 April 2005
FC-SATA Fibre Channel Storage- 1 SCSI SCSI FCP Server FCP SCSI Storage SCSI Shelf FCP FCP FCP Server FC-SATA FC-SATA SATA Switch FAST RAID FIS SATA Storage Shelf SCSI payloads Server map to SATA FIS, wrap in FC-SATA SATA FIS 7 T13/e05125r0 12 April 2005
FC-SATA Fibre Channel Storage- 2 SCSI SCSI FCP Server FCP SCSI Storage Shelf FCP FC-SATA Server FC-SATA SATA FC-SATA FIS SATA Switch FAST RAID FIS SATA ATA FC-SATA Storage Shelf SATA FIS Server FC-SATA payloads Virtualize, or simply pass through map to SATA FIS, SATA FIS wrap in FC-SATA 8 T13/e05125r0 12 April 2005
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 9 T13/e05125r0 12 April 2005
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 10 T13/e05125r0 12 April 2005
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) 11 T13/e05125r0 12 April 2005
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