Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 111)

BBU Object Commands
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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
can 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
/cx/phyx set link=auto|1.5|3.0|6.0
The /cx/phyx set link command sets the link speed for the specified phy. This
controls the speed between the controller and the hard drive or enclosure to
which it is connected. The possible values for SAS and SATA drives are:
auto, 1.5, 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.
BBU Object Commands
Battery Backup Unit (BBU) Object Commands are commands that provide
information and perform actions related to a specific BBU installed on a
specific controller, such as /c0/bbu.
This object is only available on controllers on which a BBU is actually
installed.
Syntax
/cx/bbu show
Note : After link speed control is set to a different value, you must reboot the system
for the new link speed to take effect.
Note : The BBU firmware version and bootloader version do not apply for 9750
controller models.