User Manual

SCSI Commands Reference Manual, Rev. J 358
www.seagate.com Parameters for direct access devices
REASON field
The REASON field indicates the reason sent by the target device for the last link reset sequence and is defined in Table 337.
NEGOTIATED LOGICAL LINK RATE field
The NEGOTIATED LOGICAL LINK RATE field is defined in Table 338 and indicates the logical link rate being used by the phy. For
physical phys, this is negotiated during the link reset sequence. For virtual phys, this field should be set to the maximum physical
link rate supported by the expander device. This field may be different from the negotiated physical link rate when multiplexing
is enabled.
Table 337 Reason field definition
Code Description
0h
Unknown reason
1h
Power on
2h
Hard reset (e.g., the port containing this phy received a HARD_RESET primitive during the hard reset
sequence) (see SPL-3 r02, Section 4.4.2), or SMP PHY CONTROL function HARD RESET phy operation (see
SPL-3 r02, Section 9.4.3.28)
3h
SMP PHY CONTROL function LINK RESET phy operation, or TRANSMIT SATA PORT SELECTION SIGNAL
phy operation (see SPL-3 r02, Section 9.4.3.28)
4h
Loss of dword synchronization (see SPL-3 r02, Section 5.13)
5h
After the multiplexing sequence completes, MUX (LOGICAL LINK 0) received in logical link 1 or MUX
(LOGICAL LINK 1) received in logical link 0 (see SPL-3 r02, Section 5.15)
6h
I_T nexus loss timer expired in the STP target port of an STP/SATA bridge when the phy was attached to
a SATA device (see SPL-3 r02, Section 4.4.3)
7h
Break Timeout Timer expired (see SPL-3 r02, Section 6.14.8)
8h
Phy test function stopped (see SPL-3 r02, Section 9.4.3.29)
9h
Expander device reduced functionality (see SPL-3 r02, Section 4.5.8)
Ah to Fh
Reserved
Table 338 NEGOTIATED LOGICAL LINK RATE field
NEGOTIATED PHYSICAL LINK RATE field Multiplexing NEGOTIATED LOGICAL LINK RATE field
9h (i.e., G2)
Disable
9h (i.e., 3Gb/s)
Enable
8h (i.e., 1.5Gb/s)
Ah (i.e., G3)
Disable
Ah (i.e., 6Gb/s)
Enable
9h (i.e., 3Gb/s)
Bh (i.e., G4)
Disable
Bh (i.e., 12Gb/s)
Enable
Ah (i.e., 6Gb/s)
All others
Any
Same as the NEGOTIATED LOGICAL LINK RATE field