Chapter 1: Overview Serial Attached SCSI and the SAS6160 Switch

LSISAS6160 SAS Switch User Guide

1.2Serial Attached SCSI and the SAS6160 Switch

SAS replaces Ultra320 SCSI as the next phase in the evolution of the SCSI standard. The SAS interface addresses enterprise data storage and retrieval requirements with features such as point-to-point topology, 6.0Gb/s transfer rate, minimum arbitration overhead, native support for both SAS and SATA drives, and smaller cables and connectors.

In SAS storage environments, the SAS6160 switch allows connection of multiple targets and initiators through a switched device for manageable scalability. The integrated SDM application provides a central management point to view the SAS topology, manage other switches or expanders in the domain, and to configure zoning to provide exclusive access between endpoints in the domain. The SAS6160 switch allows data centers to benefit from the improved performance, minimum arbitration overhead, simplified cabling, and lower system implementation costs of SAS and SATA, while easing migration from Direct Attached Storage.

Figure 1: The LSISAS6160 Switch

The SAS6160 switch uses two LSISAS2x36 6Gb/s SAS expanders, which are compliant with the ANSI Serial Attached SCSI specification and support SATA as defined in the Serial ATA: High Speed Serialized AT Attachment and the Serial ATA II: Port Selector Specification.

The SAS6160 switch functions as a single expander and offers advanced hardware management with an external power supply module, and two enclosure fans, and temperature and power supply voltage sensing/alerts. The switch is housed in a compact chassis for easy shelf placement in rack mounted server clusters.

NOTE: The two connectors on the upper left of the face plate (port 0 and port 2) support active cabling for longer cable runs. Passive cables may also be connected to these ports for normal cable runs.

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LSI Corporation September 2010

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LSI manual Serial Attached Scsi and the SAS6160 Switch, LSISAS6160 Switch