ATA, SATA, SCSI, NAS and SAN : How to Choose the Right Storage Technology

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ATA, SATA, SCSI, NAS and SAN How to Choose the
Right Storage Technology

• Craig Thornton
• President, Cnetics Technologies

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What does your information look like and how do
you look at it?
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Agenda
1. Show Up and Throw Up
2. Technology
3. Storage Solutions
4. Business Solutions
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Technology

• Interfaces
• ATA
• IDE EIDE SATA
• SCSI
• SE FWD Ultra SAS
• Fibre FATA

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Interface Specs
Seek Time Duty Cycle MTBF Application RPM
SATA 9.5ms 8hrs/day 5days/week 600,000 _at_desktop workloads Low Availability, sequential reads 7200
SAS 3.6ms 24hrs/day, 7days/week 1,200,000 _at_ Enterprise Work Loads On-Line, High Availability, random reads 15000
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Specs
SATA SAS FC arbitrated loop
Performance Half Duplex Full Duplex Full Duplex
Performance 3Gb/s 3Gb/s - 6Gb/s 4Gb/s
Connectivity 1.5 m internal gt8 m external 6 m internal external cable 15 m cable
Connectivity One device (fan out devices) 128 devices (16384 max) 127 devices
Connectivity No Peer to Peer Peer-to-Peer Peer-to-Peer
Availability Single port HDD Dual-port HDD Dual-port HDD
Availability Single-host Multi-initiator Multi-initiator
Driver Model Software Transparent with Parallel ATA Software Transparent with Parallel SCSI Software Transparent with Parallel SCSI
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Defining the Problem

• The right answer to the wrong problem is very
  difficult to fix.
• Capacity
• Performance
• Reliability
• Manageability
• Cost
• On-line, Offline, Near-line
• Storage or Server Consolidation Virtualization

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Storage Segments
1. Network Storage
2. Server Storage - OLTP
3. High Density
4. Nearline
5. Low Cost Server
6. PC Commercial
7. PC Consumer
8. Notebook
9. DVR
10. Gaming / Audio / Video
11. Handheld
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Technology
SATA
Non HDD Intensive
Non Mission Critical
Upgrade To SAS When nec.
Lowest Acquisition /GB
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Technology
SAS
HDD Intensive Applications
Mission Critical Servers
SATA Compatible
Ultimate Configuration Flexibility
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SAS Protocols
SMP
SSP
STP
Serial Management Protocol
Serial SCSI Protocol
Serial Tunneling Protocol
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Storage Solutions

• Types
• Just a Bunch Of Disks (JBOD)
• Redundant Array of Inexpensive Disks (RAID)
• 0,1 0/1, 3, 5 etc
• Network Attached Storage (NAS)
• Storage Area Network (SAN)

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Storage Solutions NAS

• Network Attached Storage
• iSCSI
• IP SAN
• Ethernet

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Storage Solutions NAS

• iSCSI IP SAN
• Enterprise File Services Clustered Gateway
• WAN Accelerators

Location of data may be anywhere on the LAN or WAN
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Storage Solutions SAN

• Fibre Channel
• Storage Area Network
• 1Gb/s, 2Gb/s, 4Gb/s, 10Gb/s
• Manageable, Secure
• Logic is in the Fabric

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Storage Solutions NAS/SAN Fusion

• Multi-Protocol Routing
• FC-FC Subnet Routing Service for SAN island
  consolidation
• FCIP Tunneling Service for SAN extension over
  distance
• iSCSI Gateway Service for sharing Fibre Channel
  storage with servers on IP network

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Storage Solutions Moment of Truth

• NAS or SAN ?

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Business Solutions

• Drivers for Business Solutions
• Regulatory
• Sarbanes-Oxley
• HIPPA Compliance
• CISP
• Security
• Confidentiality
• Integrity
• Availability Backup Recovery
• Revenue
• Performance
• High Availability

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Business Solutions -ILM

• Information Lifecycle Management
• Continuity
• Data Management
• Controlling Costs
• Compliance