Improving Networks Worldwide. UNH InterOperability Lab Serial Attached SCSI (SAS) Use Cases
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Improving Networks Worldwide.
UNH InterOperability Lab
Serial Attached SCSI (SAS)Use Cases
Improving Networks Worldwide.
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SAS Use Cases
Presentation Topics
• Types of SAS Devices• SAS/SATA Interoperability• Cables and Connector Types
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SAS Use Cases
SAS Device Types• Initiators
– Host Bus Adaptors (HBA)
• Targets– Hard Disk Drives, Tape Drives, other SCSI
Devices
• Edge Expanders– Enclosures
• Fanout Expanders– SAS Switches
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SAS Use Cases
SAS Initiators
• Allows the computer to communicate with media
• Interfaces with computer system via– PCI– PCI-X– PCI-Express
Computer SystemSAS Initiator
Network Interface
Soundcard
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SAS Use Cases
SAS Targets
• Hard Disk Drives (HDD)– Spinning Magnetic media– 10,000 or 15,000 rotations per minute
• Solid State Drives (SSD)– IC based media
• Tape Drives– Thin, magnetic media– Typically DAT or LTO
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SAS Use Cases
SAS Targets
• Stores Information• Most SAS Targets have two data
interfaces• Interfaces with the computer
system via the SAS Initiator
Computer SystemSAS InitiatorSAS Target
SAS Target
SAS Target
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SAS Use Cases
Edge Expanders
• Found inside enclosures• Allows multiple targets to be
connected to a initiator via one cable
Computer SystemSAS Initiator
SAS Enclosure
SAS Target
SAS Target
SAS Target
SAS Target
SAS Target
SAS Target
SAS Target
SAS Target
Edge ExpanderEdge Expander
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SAS Use Cases
Fanout Expanders
• Also called a SAS Switch• Allows multiple Edge Expanders to
be connected to a initiator
Computer SystemSAS Initiator
SAS EnclosureSAS EnclosureSAS Enclosure
Switch
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SAS Use Cases
SAS/SATA Interoperability
• SAS is designed to Interoperate with SATA devices
• SATA targets can be connected to SAS Initiators and Expanders.
• SAS targets and expanders can NOT be connected to SATA Initiators.
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SAS Use Cases
SAS/SATA Interoperability
Computer SystemSAS Initiator
SAS Enclosure
SAS Target
SATA Target
SAS Target
SAS Target
SAS Target
SATA Target
SAS Target
SATA Target
SATA Drives can be used in most SAS Enclosures or connected directly to most SAS initiators.
SATA Target
SAS Target
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SAS Use Cases
SAS/SATA Interoperability
Computer SystemSATA Initiator
SAS Targets cannot be connected to SATA Initiators
SAS Expanders cannot be connected to SATA Initiators.
SAS Target
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SAS Use Cases
SAS Connectors• Numerous connectors defined
– Male/Female Drive Connectors– Two Types of 4x Internal Connectors
• 4i Wide (Legacy)• 4i Mini (aka Mini-SAS Internal, added with SAS2.0,
Industry Standard Now)– External 4x Connectors
• Infiniband Style (Legacy)• iPass Style (aka Mini-SAS, added with SAS2.0, Industry
Standard Now)• QSFP Under development for Optical and Active Cable
solutions
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SAS Use Cases
Male Drive Connector
Source: SAS-2 rev15a, Page 145
Top view
Bottom view
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SAS Use Cases
Male Drive Connector
Top view
Bottom view
Note: Two signal connectors.
From S1 to S7 and from S8 to S14
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SAS Use Cases
Male Drive Connector
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SAS Use Cases
Female Single-Port Drive Connector
Source: SAS-2 rev15a, Page 145
Top view
Bottom view
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SAS Use Cases
Female Dual-Port Drive Connector
Source: SAS-2 rev15a, Page 146
Top view
Bottom view
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SAS Use Cases
Female Backplane Drive Connector
Source: SAS-2 rev15a, Page 146
Top view
Bottom view
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SAS Use Cases
Male 4i Wide Cable Connector
Source: SAS-2 rev15a, Page 149
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SAS Use Cases
Female 4i Wide Cable Connector
Source: SAS-2 rev15a, Page 149
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SAS Use Cases
Female 4i Wide Cable Connector
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SAS Use Cases
Male 4i Mini-SAS Cable Connector
Source: SAS-2 rev15a, Page 152
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SAS Use Cases
Female 4i Mini-SAS Cable Connector
Source: SAS-2 rev15a, Page 152
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SAS Use Cases
Male 4x Infiniband Style Cable Connector
Source: SAS-2 rev15a, Page 155
Note: This is a legacy connector
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SAS Use Cases
Male 4x Infiniband Style Cable Connector
Note: This is a legacy connector
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SAS Use Cases
Female 4x Infiniband Style Cable Connector
Source: SAS-2 rev15a, Page 156
Note: This is a legacy connector
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SAS Use Cases
Male 4x Mini-SAS Cable Connector
Source: SAS-2 rev15a, Page 158
• 4 Variations• Untrained 1.5 and
3.0 Gbps In/Out• Trained 1.5, 3.0,
and 6.0 Gbps In/Out
• Keyed and marked to distinguish
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SAS Use Cases
Male 4x Mini-SAS Cable Connector
Source: SAS-2 rev15a, Page 159
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SAS Use Cases
Male 4x Mini-SAS Cable Connector
Source: SAS-2 rev15a, Page 160
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SAS Use Cases
Male 4x Mini-SAS Cable Connector
Source: SAS-2 rev15a, Page 160
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SAS Use Cases
Male 4x Mini-SAS Cable Connector
Source: SAS-2 rev15a, Page 161
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SAS Use Cases
Male 4x Mini-SAS Cable Connector
Note: Non-keyed, universal connector
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SAS Use Cases
Male 4x Mini-SAS Cable Connector
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SAS Use Cases
Female 4x Mini-SAS Cable Connector
Source: SAS-2 rev15a, Page 162
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