User Manual

SCSI Commands Reference Manual, Rev. J 459
www.seagate.com Parameters for direct access devices
MAX DRIVER SLEW RATE CONTROL or C3 CONTROL (12G Mode Only) field
This field shall contain the max allowable driver slew rate setting of the target device SAS phy. This field is changeable but not savable.
DRIVER STRENGTH CONTROL CHANGE PER STEP or C1 CONTROL (12G Mode Only) field
This field shall contain the approximate voltage change (in mV unit) for each increment or decrement of driver strength control setting. The
field is unchangeable.
DRIVER EMPHASIS CONTROL CHANGE PER STEP or C2 CONTROL (12G Mode Only) field
This field shall contain the approximate percentage of amplitude change (in % unit) for each increment or decrement of driver emphasis con-
trol setting. This field shall be used to establish the transceiver driver pre-emphasis or de-emphasis. The field value should be treated as a
2's-complement signed value that can range from 1 to +100 for pre-emphasis, or -1 to -100 for de-emphasis. The field is unchangeable.
DRIVER SLEW RATE CONTROL CHANGE PER STEP or C3 CONTROL (12G Mode Only) field
This field shall contain the approximate slew rate change (in mV/nsec unit) for each increment or decrement of driver slew rate control setting.
The field is unchangeable.
MAX RECEIVER THRESHOLD CONTROL field
This field contains max allowable threshold setting of the target device SAS phy. The field is unchangeable.
MANUFACTURER DEFINED BYTES INFO FOR TRANSMITTER CONTROL field
This field can be used by manufacturer who needs additional control bytes for the transmitter.
MAX RECEIVER EQUALIZATION GAIN CONTROL field
This field contains the max allowable receiver equalization gain setting of the target device SAS phy. The field is unchangeable.
RECEIVER THRESHOLD CONTROL CHANGE PER STEP field
This field shall contain the approximate voltage change (in mV unit) for each increment or decrement of receiver threshold control setting. The
field is unchangeable.
RECEIVER EQUALIZATION GAIN CONTROL CHANGE PER STEP field
This field shall contain the approximate gain change for each increment or decrement of receiver equalization gain control setting. The field is
unchangeable.
MANUFACTURER DEFINED BYTES INFO FOR RECEIVER CONTROL field
This field can be used by manufacturer who needs additional control bytes for the receiver.