Solaris SAN Configuration and Multipathing Guide

Chapter 6 Configuring SAS Domains

This chapter provides overviews of SAS Domain considerations, SAS device discovery, and SAS boot device configuration.

SAS Multipathing Considerations

Dynamic Discovery of SAS Devices

Adding and removing SAS devices is performed dynamically when using the mpt(7d) driver. You are no longer required to edit the sd.conf file to enable your system to detect specific targets and LUNs attached with the mpt driver. See mpt(7d) for more information.

You are no longer required to edit the sd.conf file to enable your system to detect specific targets and LUNs attached with the mpt driver.

If you add or remove a device in your SAS domain, messages will be written to the /var/adm/messages file indicating presence or removal. If a device has been added, it is visible to and available by the format(1m) command.

Configuring SAS Boot Devices

The Solaris Multipathed IO software allows Solaris 10 Update 5 OS hosts to boot from a multipathed SAS device, or from a SATA device connected to a SAS controller. Only the bundled mpt driver is supported for SAS multipathing in the Solaris 10 Update 5 OS release.

Some SAS and SATA devices might not support multipathing but will still function as non-multipathed devices. See http://sunsolve.sun.com for more information.