Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
181
18.10.12
Mode Page 19h (Port Control Parameters)
The Protocol-Specific Port mode page contains parameters that affect SSP target port operation. There is one copy
of the mode page shared by all SSP initiator ports.
18.10.12.1
Short Format of Port Control Page
Table 148 Short (Port Control Parameters) Short Format
Byte
Bit
Default
7
6
5
4
3
2
1
0
0
PS SPF=0 Page Code = 19h 99h
1
Page Length = 0Eh
0Eh
2
Reserved Continue AWT
Broadcast
Asynchronous
Event
Ready LED
Meaning
Protocol Identifier = 6h
06h
3
Reserved
00h
4-5
(MSB)
I_T Nexus Loss Timer
(LSB)
07h-D0h
6-7
(MSB)
Initiator Response Timeout
(LSB)
07h-D0h
8-9
(MSB)
Reject to Open Limit
(LSB)
0000h
10-15
Reserved
00h
 PS Parameters Savable is set to 1, indicating the parameters are saveable
 SPF shall be set to zero for access to the short format mode page
 Continue AWT bit set to one specifies that the SAS port shall not stop the Arbitration Wait Time timer and set
the Arbitration Wait Time timer to zero when the SAS port receives an OPEN_REJECT (RETRY). A CONTINUE
AWT bit set to zero specifies that the SAS port shall stop the Arbitration Wait Time timer and set the Arbitration
Wait Time timer to zero when it receives an OPEN_REJECT (RETRY).
 Broadcast Asynchronous Event bit set to one specifies that the device server shall enable origination of
Broadcast (Asynchronous Event). A BROADCAST ASYNCHRONOUS EVENT bit set to zero specifies that the
device server shall disable origination of Broadcast (Asynchronous Event).
 Ready LED Meaning specifies the READY LED signal behavior. In general, when the bit is 0, and the drive is in
a ready state, the LED is usually on, but flashes on and off when commands are processed. When the bit is 1,
the LED is usually off, but flashes on and off when commands are processed. For additional implementation
specifics, see the SAS standards.
 Protocol Identifier has a value of 6h indicating this is a SAS SSP specific mode page
 I_T Nexus Loss Time contains the time (in milliseconds) that our SSP target port shall retry connection requests
to an SSP initiator port that are rejected with responses indicating the SSP initiator port may no longer be
present before recognizing an I_T nexus loss. A value of 0 indicates a vendor specific amount of time and
defaults to a 2 second time period. A value of FFFFh indicates an unlimited period. The default value of 7D0h,
specifies a 2 second time period.
 Initiator Response Timeout contains the time in milliseconds that the SSP target port shall wait for the receipt
of a Data frame after sending the XFER_RDY frame requesting data. When the INITIATOR RESPONSE