Dell POWEREDGE C6105 - Manual (Page 51)

Using the System Setup Program | 51
Option Description
SATA-AHCI Ports Auto Clk
Ctrl
(Enabled default) This option disables the clocks for unused SATA ports
in AHCI modes. This will enable some power savings.
But please note that if you shutdown the clock, then
hot-plug for that port will not work.
SATA-IDE Ports Auto Clk
Ctrl
(Enabled default) This option disables the clocks for unused SATA ports
in IDE modes. It will enable some power savings. But
please note that if you shut clock, then hot‐plug for
that port will not work.
SATA Smbus Interface
(Disabled default) Enable or disable SATA SMBUS Interface.
SATA controller contains a smbus slave controller
which can be used to program the SATA PHY circuitry.
This is used for testing/characterization purpose.
Select SATA Port 1-6 to configure each device on the SATA channel using
the following screen: