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SAS & SATA Combine to Change the Storage Market SAS & SATA Combine to Change the Storage Market Harry Mason - Director Industry Marketing, LSI Corporation Marty Czekalski - Interface & Emerging Architecture Program Manager, Seagate Technology SNIA Legal Notice The material contained in this tutorial is copyrighted by the SNIA. Member companies and individuals may use this material in presentations and literature under the following conditions: Any slide or slides used must be reproduced without modification The SNIA must be acknowledged as source of any material used in the body of any document containing material from these presentations. This presentation is a project of the SNIA Education Committee. SAS and SATA Combine to Change the Storage Market 2 © 2009 Storage Networking Industry Association. All Rights Reserved. Abstract SAS & SATA Combine to Change the Storage Market Serial Attached SCSI (SAS) allows systems to be built that accommodates large numbers of either SAS and/or SATA hard disk drives. This presentation, intended for OEM, System Builders and End-Users, describes the capabilities of the SAS interface, how it’s designed to interoperate with SATA drives and when combined, how these technologies can be combined to deliver some very compelling storage solutions. SAS and SATA Combine to Change the Storage Market 3 © 2009 Storage Networking Industry Association. All Rights Reserved. SAS: The Evolutionary Tale…. Evolution: - Replaces Ultra320 - Preserves Legacy SCSI Software - Renews the SCSI Roadmap - Continues the Market Transition to CPU Serial Interfaces Interface Storage SAS and SATA Combine to Change the Storage Market 4 © 2009 Storage Networking Industry Association. All Rights Reserved. Ultra320 SCSI Replacement? Preserve Customer Choice Cost Equivalence Legacy SCSI w/SCSI Plug Compatible Multi-protocol Preserves 20+ Years Every-unit-Item of SCSI Middleware Economics 3.5” & 2.5” Form Factors Wide-Ports Reliability ●Dual-ported 1000’s of ●Point-to-Point Connections Future Scalable Performance Architected SAS and SATA Combine to Change the Storage Market 5 © 2009 Storage Networking Industry Association. All Rights Reserved. Blind Mating and Hot Pluggable SATA Disk Connectors: • Suitable for Both 3.5” and 2.5” Storage Devices • Includes data and voltage connections Vcc Enclosure Drive • Hot-Pluggable (staggered pins) Staged Power • Blind Mating Vcc ~3msec Data Voltage Pins Rx Tx 3.3V 5V R 12V Key Grounds Pre-charge SAS and SATA Combine to Change the Storage Market 6 © 2009 Storage Networking Industry Association. All Rights Reserved. SAS/SATA Compatibility Disk Drive Connectors SAS Connector Flip Side Port B SATA SAS Backplane Connector SAS ☻ Pluggable Accommodates both SAS & SATA Drives SAS and SATA Combine to Change the Storage Market 7 © 2009 Storage Networking Industry Association. All Rights Reserved. World-wide HDD Shipments: E n t e r p r i s e A p p l i c a t i o n s (2 0 0 8 -2 0 12 ) A l l F o r m -F a c t o r s b y I n t e r f a c e 60 50 40 FC (M’s) SCSI 30 SAS 20 SATA FC/SAS <10K RPM 10 0 Source:IDC 2008 2009 2010 2011 2012 A significant percentage of SATA in the enterprise will be deployed on SAS SAS and SATA Combine to Change the Storage Market 8 © 2009 Storage Networking Industry Association. All Rights Reserved. Storage Growth & Innovation Drives Customer Choices Prevailing wisdom: Storage Consolidation was accomplished through networked storage solutions (NAS and SAN) Virtualization & Live Migration drive Networked Storage Virtualization Networked Attached Direct Storage Attached Storage Application Intelligence Application intelligence driving applications back to DAS to reduce cost and complexity SAS and SATA Combine to Change the Storage Market 9 © 2009 Storage Networking Industry Association. All Rights Reserved. Applications Get Smarter Applications gaining intelligence Applications growing new capabilities without requiring SAN storage model High-availability clustering through application based local replication Disaster recovery through application based remote replication Greater performance through tight integration with storage subsystems Messaging Applications: Reduced I/O load profile reduces per user spindle count requirements, Reduce costs and/or enabling greater per server capabilities (user count/mailbox size) Clustering techniques, like Cluster Continuous Replication (CCR) and Standby Continuous Replication (SCR), enable robust fault-tolerant deployments for DAS deployments SAS and SATA Combine to Change the Storage Market 10 © 2009 Storage Networking Industry Association. All Rights Reserved. The Direct Attached Storage (DAS) Revival New DAS technologies are more powerful than ever Serial Attached SCSI (SAS) and Serial Attached ATA (SATA) deliver a new level of performance and cost Improved application architectures coupled with these interfaces, improves economics of storage Reduced latency important for SSDs SAS based storage deliver high performance and high capacity storage for messaging deployments. SAS JBODs coupled with CCR and SRC capabilities, deliver a new level of price performance for messaging environments SAS and SATA Combine to Change the Storage Market 11 © 2009 Storage Networking Industry Association. All Rights Reserved. Who Consumes Enterprise Drives? DAS deployments SAN & NAS deployments (Drive Interfaces by volume) (Drive interfaces by volume) 2001 approximately 70% approximately 30% (SCSI, P-ATA) (FC, SCSI, P-ATA) 2007 approximately 70% approximately 30% (SAS, SCSI, SATA) (FC, SAS, SATA) 2013 TBD % TBD % (6Gb/s SAS, SATA) (6Gb/s SAS, SATA) Application Intelligence, Virtualization Market Price, Power, Performance Ease of Use Drivers DAS & S/W Improvements Pervasive Networks Flash SAS and SATA Combine to Change the Storage Market 12 © 2009 Storage Networking Industry Association. All Rights Reserved. SAS’s Unique Attributes Performance Density (power) Compelling Solutions Scalability SAS and SATA Combine to Change the Storage Market 13 © 2009 Storage Networking Industry Association. All Rights Reserved. SAS: Bandwidth Aggregation Performance Wide-Port (x4) yields Each SAS Link (Rx and Tx) 48Gb/s Full Duplex! 3Gb/s Æ 6Gb/s (full-duplex) 6Gb/s Æ 12Gb/s (full-duplex) Wide Ports Combine SAS links (6Gb/s SAS) 2 ports – 24Gb/s (full duplex) 4 ports – 48Gb/s (full-duplex) Concurrency Brings Higher Performance Multiple concurrent I/O’s (lots of drives operating concurrently) Theoretical Bandwidth DOUBLES with 6Gb/s SAS! SAS and SATA Combine to Change the Storage Market 14 © 2009 Storage Networking Industry Association. All Rights Reserved. Form Factor Transition Density 35 30 25 20 (M’s) 2.5" 15 3.5" 10 5 Source: IDC 0 2007 2008 2009 2010 2011 2012 SAS: Enterprise Form Factor Transition SAS and SATA Combine to Change the Storage Market 15 © 2009 Storage Networking Industry Association. All Rights Reserved. Industry Compacts Storage Density SAS & Small Form Factor (SFF) SFF increases density Scale & expand in same space Ideal for Blade System Deployment SFF Drives Consume 50% less Power than 3.5” counterparts Save on volatile energy costs Growth without pulling in extra power drops Lower heat loads & air-conditioning costs at equivalent performance – Caution – Power per rack can still increase due to density increase Higher Performance and Potentially Lower Cost Multiple concurrent I/O’s (lots of drives operating concurrently) Lower TCO through common infrastructure Additional Advantages RAID 5 or 6 on a 1U server Improved Hard Disk Drive reliability SAS & SATA Drives in Common Drive Carrier SAS and SATA Combine to Change the Storage Market 16 © 2009 Storage Networking Industry Association. All Rights Reserved. Connector Types Density InfiniBand Style Mini SAS 4X Connector SAS 4X Connector Preferred External Connection Scheme SAS and SATA Combine to Change the Storage Market 17 © 2009 Storage Networking Industry Association. All Rights Reserved. Scaling outside the Server Density Expand Your DAS Capabilities SAS and/or Controller Cascaded SAS Cables Enclosures SAS and SATA Combine to Change the Storage Market 18 © 2009 Storage Networking Industry Association. All Rights Reserved. SAS: Improving Density and Airflow Density Up to 160 SAS Links per 1u Rack! SATA/SAS Cable External & Internal Highly Scalable Architecture VS Parallel SAS 1.1 Mini SAS Connectivity and Bandwidth (4x & 4i) Dramatically Improves Connectivity, Density & Airflow SAS and SATA Combine to Change the Storage Market 19 © 2009 Storage Networking Industry Association. All Rights Reserved. Self Configuring Expanders Extend SAS Scalability 1st Gen SAS Discovery Vendor Unique Zoning Limited to 128 Discovery Executed by Initiator end-devices Complicated large topologies Serial Attached SCSI or SATA disk drives Problematic for zoning (Targets) Hosts Expanders 2nd Gen SAS Discovery (Initiators) Standardized Zoning Expanded to 1K Discovery executed by SAS Expanders Reduces time to discover large topologies Enables zoning of the topology Allows table-to-table routing Enables Richer SAS Topologies SAS and SATA Combine to Change the Storage Market 20 © 2009 Storage Networking Industry Association. All Rights Reserved. Expanders – Scaling SAS Architecture Scalability SAS Expander Complex (internal view) SAS HBAs Various JBODs w SAS Expander Complex (packaged view) SAS and SATA Combine to Change the Storage Market 21 © 2009 Storage Networking Industry Association. All Rights Reserved. Cascading Enclosures Scalability / = Universal Connection (required at both end points) = IN – Connects to universal or OUT port = OUT – Connects to Universal or IN
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