Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
257
- Phy Test Pattern specifies the phy test pattern to be transmitted when the Phy Test Function is set to 01h. If an
unsupported value is specified, Check Condition status will be returned with a sense key of Illegal Request and
additional sense of Invalid Field in Parameter List.
Phy Test Function
Description
00h
If the selected phy is performing a phy-test function, then the selected phy stop performing
the phy test function and originate a link reset sequence. If the selected phy is not
performing a phy test function, then this function as no effect on the selected phy.
01h
If the selected phy is not performing a phy test function, the selected phy will be set to
transmit the phy test pattern specified by the Phy Test Pattern field at the physical link rate
specified by the Phy Test Pattern Physical
02h-FDh
Unsupported
FEh
Analog Loopback - If the selected phy is not performing a phy test function, the selected
phy will be set to retransmit the data pattern received by the phy receiver without retime
FFh
Retime Loopback- If the selected phy is not performing a phy test function, the selected phy
will be set to retransmit the retimed data pattern received by the phy receiver
Table 238 Phy Test Pattern
Phy Test Pattern
Description
00h
Reserved
01h
JTPAT
02h
CJTPAT
03h-0Fh
Reserved
10h
TRAIN
11h
TRAIN_DONE
13h
SCRAMBLE_0
12h
IDLE
14h - 3Fh
Reserved
40h
TWO_DWORDS
41h – Efh
Reserved
F0h
PRBS7 (DC un-balanced version)
F1h-FFh
Reserved
- Phy Test Pattern Physical Link Rate specifies the physical link rate at which the phy test pattern shall be
transmitted. Supported values are 8h for 1.5 Gbps, 9h for 3.0 Gbps, and Ah for 6.0 Gbps. If an unsupported
value is specified, Check Condition status will be returned with a sense key of Illegal Request and additional