Avago Technologies 3ware SAS 9750-4i - Manual (Page 123)

Phy Object Commands
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Phy Object Commands
These commands are for 9750 and 9690SA controllers only.
Phy Object Commands are sent to an instance of a controller phy such as
/c0/phy0.
Syntax
/cx/phyx show
/cx/phyx set link=auto|1.5|3.0|6.0
/c x /phy x show
This command is only for 9750 and 9690SA controller models, and for
9650SE with Release 9.5.2 or later.
This command presents a summary report on the specified phy. The link
speed of the phy is shown in three columns: Supported, Enabled, and Control.
The Supported and Enabled values are set for the phy and are not changeable.
The Control value is the link speed that may be set with the
/cx/phyx set link=auto|1.5|3.0|6.0 command. The default is auto.
Example:
//localhost> /c3/phy0 show
Device --- Link Speed (Gbps) ---
Phy SAS Address Type Device Supported Enabled Control
--------------------------------------------------------------------------
phy0 2007020800153811 SATA /c3/p1 1.5-3.0 3.0 1.5
/c x /phy x set link=auto|1.5|3.0|6.0
This command is only for 9750 and 9690SA controller models, and for
9650SE with Release 9.5.2 or later.
This command sets the link speed for the specified phy. This will control the
speed between the controller and the hard drive or enclosure to which it is
connected. The possible values for SATA are:
auto , 1.5, or 3.0 . The possible
values for SAS are: auto , 3.0, or 6.0 . Speed is in gigabits per second and
the default setting is auto.
Example:
//localhost> /c0/phy0 set link=1.5
Sending link speed control of /c0/phy0 to [1.5 Gbps] ... Done.
Note : After link speed control is set to a different value, it is necessary to reboot the
system for the new link speed to take effect.