Hosted by Disk Cost Busters “How to Leverage Low Cost Disk Solutions” Ron Lovell, Practice Director, Storage Greenwich Technology Partners

Hosted by Agenda Challenges Technology Overview Vendor Round-up Conclusions Audience Response

Hosted by Challenges The cost of SAN remains high compared to DAS As the majority of data still resides on DAS, the cost differential creates a barrier to the adoption of shared storage model for many applications

Hosted by Challenges New regulatory requirements such as Sarbanes-Oxley Accelerating growth of fixed content type data

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Business Non- Critical Business Critical Mission Critical

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Solution Leverage the benefits of networked storage Leverage lower cost storage technology at price the business can rationalize

Hosted by Technology Overview A Look at New Disk Interface Technologies

Hosted by Technology Overview New, lower cost interface technologies Serial Advanced Technology Attachment (SATA) Serial Attached SCSI (SAS)

Hosted by Technology Overview Serial Advanced Technology Attachment (SATA) Creates a point-to-point connection between the Serial ATA host bus adapter and the Serial ATA device (hard disk drive, etc). Where transfer rates top out at 133Mb/sec for parallel ATA (UltraATA), transfer rates begin at 150 MB/sec for SATA The maximum data cable (4 conductor) cable length is 1 meter

Hosted by Technology Overview SATA MTBF is K hours  50 hr/week Duty Cycle SATA II is designed support hot-swapping of drives, enabling feature-rich RAID protected storage enclosures to be developed SATA II Port Selector enhancement released on 8/28/03 allows for two (redundant) paths to a storage device

Hosted by Technology Overview Serial Attached SCSI (SAS) Improvement over parallel SCSI Data rate increases from 320MB/sec up to 1200MB/second Full duplex, dual ported drives, 2.5 form factor Multiples drives addressed from a single controller port

Hosted by Technology Overview SAS Mix SATA and SAS drives on the same controller 10 Meter cable length Standard for interface specification completed in May Products expected to begin shipping next year

Hosted by SATA/SAS Quick Comparison CriteriaSATASAS Data Rates MB/Sec MB/Sec MTBF K hrs1.2M hrs Capacity250Gb Cable Length1m10m Cost/MB$.01 - $.02$.05 - $.08 (Est) Rotational Speed5.4 or 7.2K RPM10-15k RPM Buffer8MB64MB

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Technology Overview Summary Serial Attach technology overcomes the data bus speed limitations of Parallel Serial ATA drives are ATA drives with a serial interface and ~10% higher price Serial SCSI products won’t be available until 2004

Hosted by Technology Overview Summary Leverages large format, low cost drives OS compatible 4096 devices addressable with expanders SATA drives interoperate with SAS

Hosted by Vendor Roundup What’s Happening Out There

Hosted by Vendor Roundup EMC Clariion supports Parallel ATA Centera (Content Addressable Storage) uses ATA HP SATA drive support available SAS is in progress HP, Adaptec, and Seagate working on a combined SAS/SATA solution

Hosted by Vendor Roundup IBM 80 and 160Gb SATA Drives SATA interfaces on system boards HDS No current array support No current plans to integrate SATA into existing array products Plans to integrate SAS as demand ramps

Hosted by Vendor Roundup XIOTECH SATA and SAS on Magnitude 3D Roadmap Dynamic Network Factory SCSI to SATA Raid-capable arrays from.5T to 4T and 512Mb cache max

Hosted by Vendor Roundup Dot Hill No current support Products possible early next year Look for announcements later this Fall NetApp NearStore product line leverages ATA disk

Hosted by Vendor Roundup StorageTek BladeStore – 12T to 150T Maxtor MaXLine ATA Technology InoStor (Tanberg Data) ValuNAS 9000 supports up 2.25T on SATA with multiple raid levels

Hosted by Vendor Roundup LSI Logic SATA RAID Controller Working with HDS on SAS offering Fujitsu Serial ATA drives available

Hosted by Vendor Roundup Maxtor SATA drives available Demo of SAS with LSI Logic Seagate SATA drives available Working with HP and Adaptec on SAS/SATA solution

Hosted by Vendor Roundup Summary Most vendors have roadmaps for both SATA and SAS but, market demand is still in question Partnerships are being created to speed product creation Vendors are creating stand-alone solutions as well as some integration with existing products

Hosted by Conclusions What Does This All Mean?

Hosted by How is SATA being used? Low cost primary storage arrays for appropriate applications Backup and recovery acceleration Content Addressable Storage

Hosted by Possible Uses for the Technology SATA Fixed content such as multimedia data Virtual tape device (two stage backup) Facilitating data migrations Supporting applications with low end data criticality and performance requirements

Hosted by Possible Uses for the Technology SATA Supporting applications with large temporary file requirements More cost-effective data replication target in remote locations Floating mirrors in larger storage arrays

Hosted by Possible Uses for the Technology SAS (Future) Supporting applications with mid-level data criticality and performance requirements Supporting some lower cost configurations that traditionally would have called for FC Medium-term archiving

Hosted by Things To Watch Out For New-ness and robustness of the technology Standards development Reliability of ATA vs SCSI drives Solutions where SATA/SAS are integrated into existing array technology

Hosted by Where is the disk market going? Expanded and increased pressure for lower cost solutions and comprehensive management tool support Serial Attach represents a powerfully disruptive force Mid-tier storage prices are getting pretty low!

Hosted by Where is the Disk Market Going? SATA and SAS will be integrated into existing vendor solutions and will generate new products and vendors Adoption will likely be quicker than FC If the price points are right, SAS may completely overshadow SATA

Hosted by Audience Response 1.Will SAS eventually replace FC? 2.Will SAS or SATA become dominant? 3.Are you implementing RAID SATA solutions? 4.Is now a good time to buy mid-tier storage? Hosted by