Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
141
Table 118 SAS Log Descriptor (part 3 of 3)
Byte
Bit
7
6
5
4
3
2
1
0
72-74
Reserved
75
PHY Event Source (02h)
(Running Disparity Error Count)
76-79
(MSB)
PHY Event
(LSB)
80-83
(MSB)
Peak Value Detector Threshold (00h)
(LSB)
84-86
Reserved
87
PHY Event Source (03h)
(Loss of Dword Sync)
88-91
(MSB)
PHY Event
(LSB)
92-95
(MSB)
Peak Value Detector Threshold (00h)
(LSB)
96-98
Reserved
99
PHY Event Source (04h)
(PHY Reset Problem)
100-103
(MSB)
PHY Event
(LSB)
104-107
(MSB)
Peak Value Detector Threshold (00h)
(LSB)
 Attached Device Type is set to the value received by this PHY during an Identify Sequence.
 Attached Reason indicates the value of the REASON field in the last received IDENTIFY address frame (see
Table 35) during the identification sequence if the PHY is a physical PHY and a SAS PHY or expander PHY is
attached. If the PHY is a physical PHY and a SATA PHY is attached, then the ATTACHED REASON field
shall be set to 0h after the initial Register – Device to Host FIS has been received. If the PHY is a virtual PHY,
then the ATTACHED REASON field shall be set to 0h.
 Reason indicates the reason for the last link reset sequence as reported in the last transmitted IDENTIFY
address frame (see Table 34). If the PHY is a physical PHY and a SATA PHY is attached, then the REASON
field indicates the reason for the link reset sequence. For Reason field, refer Table 35.
 Negotiated PHY Link Rate: set to the link rate negotiated during last Link Reset Sequence.
- set to 8h when the PHY is enabled and the negotiated speed is 1.5G
- set to 9h when the PHY is enabled and the negotiated speed is 3.0G
- set to Ah when the PHY is enabled and the negotiated speed is 6.0G