User Manual

SCSI Commands Reference Manual, Rev. J 448
www.seagate.com Parameters for direct access devices
5.3.30 SAS – Transceiver Control (Out) subpage (19h/E5h)
5.3.30.1 Introduction
The Transceiver Control (Out) subpage (see table 419) of the SAS Protocol-Specific Port mode page is used to adjust the
transceiver parameter values of a phy. This subpage, when implemented, must comply with the following additional itemized
requirements:
1) The transceiver parameter settings may only be adjusted temporarily using the contents of this mode page, and cannot be saved.
2) New phy settings are not to take effect until after status is returned for the MODE SELECT command that is issued to adjust the phy
settings.
3) The Transceiver Control subpage shall not be returned for a MODE SENSE command to return all pages. It shall only be returned to a
MODE SENSE command, specifically, for the Transceiver Control subpage (19h/E5h).
4) Transceiver Control Subpage E5h must include all mode descriptor for each link rate of each phy. For non-supported link rate, fill the
mode descriptor bytes with 00.
Table 419 SAS Transceiver Control (Out) subpage
Bit
Byte
7 6 5 4 3 2 1 0
0 PS SPF(1b) PAGE CODE (19h)
1 SUBPAGE CODE (E5h)
2 (MSB)
PAGE LENGTH (n - 3)
3 (LSB)
4 Reserved
5 Reserved PROTOCOL IDENTIFIER (6h)
6 Reserved
7 NUMBER OF PHYS (02h for a dual ported disk drive)
8
Reserved. . .
14
15 TRANSCEIVER CONTROLS MODE DESCRIPTORS LENGTH
16 Phy Transceiver Controls mode descriptor (first) PHY IDENTIFIER = 0
CONTROLLABLE LINK RATE = 08h
. . . . . .
32 Phy Transceiver Controls mode descriptor (first) PHY IDENTIFIER = 0
CONTROLLABLE LINK RATE = 09h
. . . . . .
48 Phy Transceiver Controls mode descriptor (first) PHY IDENTIFIER = 0
CONTROLLABLE LINK RATE = 0Ah
. . . . . .
64 Phy Transceiver Controls mode descriptor (first) PHY IDENTIFIER = 0
CONTROLLABLE LINK RATE = 0Bh
. . . . . .
80 Phy Transceiver Controls mode descriptor (second) PHY IDENTIFIER = 1
CONTROLLABLE LINK RATE = 08h
. . . . . .
96 Phy Transceiver Controls mode descriptor (second) PHY IDENTIFIER = 1
CONTROLLABLE LINK RATE = 09h
. . . . . .
112 Phy Transceiver Controls mode descriptor (second) PHY IDENTIFIER = 1