Chapter 1: Overview Serial Attached SCSI and the SAS6160 Switch

LSISAS6160 SAS Switch User Guide

You can connect multiple SAS6160 switches in various topologies to provide failover support and to increase the number of connected devices in the SAS domain. The theoretical upper limit of SAS devices in a domain is 16,000. Each SAS6160 switch can handle 1000 SAS addresses.

The following figure shows a high-level block diagram of the SAS6160 switch.

Temp

Sensor

RTC

Fan Control

Flash

Memory

PBSRAM

Memory

Ethernet

Phy

 

 

 

 

 

 

4 SAS Lanes (for failover)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SAS2x36

 

SAS2x36

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Expander

 

 

 

 

Expander

 

 

 

 

 

 

 

 

 

 

Master

 

 

 

 

Slave

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dual Port

 

 

 

 

 

 

 

 

 

 

 

Memory

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32 SAS Lanes

 

 

 

 

32 SAS Lanes

 

 

 

 

 

 

 

 

 

 

 

 

 

x2

x2

x2

x2

x4

x4

16 x4 External Mini SAS Connectors

Temp

Sensor

Fan Control

Flash

Memory

PBSRAM

Memory

Figure 3: Block Diagram of the LSISAS6160 Switch

This diagram contains the following functional blocks:

„SAS2X36 Expander – This block includes such management functions as routing, device discovery, and zoning. It also includes an embedded version of SDM. This block controls the flow of data through the SAS connectors.

„SAS Connectors – The SAS6160 switch has 16 x4 Mini SAS connectors, numbered 0 through 15. It supports connection to SAS devices at link rates of 3.0Gb/s and 6.0Gb/s.

„Ethernet Phy – The external 10/100 Ethernet port provides access to the browser-based SDM management application, which sets up storage configurations in the SAS domain, monitors the status of the switch, and runs diagnostic tests. It also provides access to the SDM command line interface (CLI).

„Real Time Clock – The battery-powered real-time clock is set at the factory.

„Fans – The SAS6160 switch enclosure contains two fans. The fan speed is regulated based on the temperature inside the enclosure. You can monitor the status of the fans with the SDM utility.

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LSI Corporation September 2010

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Image 8
LSI manual Block Diagram of the LSISAS6160 Switch