User Manual

SCSI Commands Reference Manual, Rev. J 456
www.seagate.com Parameters for direct access devices
The PARAMETERS SAVEABLE (PS) bit is defined in SPC-5.
The SUBPAGE FORMAT (SPF) bit is defined in SPC-5 and shall be set to the value defined in table 429.
The PAGE CODE field is defined in SPC-5 and shall be set to the value defined in table 429.
The SUBPAGE CODE field is defined in SPC-5 and shall be set to the value defined in table 429.
PAGE LENGTH field
The PAGE LENGTH field is defined in SPC-5 and shall be set to the value defined in table 429 (i.e., 4 + (the value of the NUMBER OF PHYS field) ×
(the length in bytes of the SAS phy mode descriptor)).
PROTOCOL IDENTIFIER field
The PROTOCOL IDENTIFIER field is defined in SPC-5 and shall be set to the value defined in table 429 indicating that this is a SAS specific mode
page.
NUMBER OF PHYS field
SAS devices may have more than one target port. If a target device has 2 operational target ports (2 phys), then this field shall be set to 2h. Tar-
get devices with only one port shall set this field to 1h. The field is unchangeable.
TRANSCEIVER CONTROLS MODE DESCRIPTOR LENGTH field
The Transceiver Controls Mode Descriptor Length field shall contain the total length in bytes of each phy’s transceiver controls mode descrip-
tor. Since the descriptors are the same length, this value is not provided in each descriptor, but rather, once in this subpage prior to the descrip-
tor(s). The field is unchangeable.
. . . . . .
128 Phy Transceiver Controls mode descriptor (second) PHY IDENTIFIER = 1
CONTROLLABLE LINK RATE = 0Bh
. . . . . .
144 00