User Manual

SCSI Commands Reference Manual, Rev. J 439
www.seagate.com Parameters for direct access devices
CONTINUE AWT BIT
0 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).
1 A CONTINUE AWT bit set to one specifies that the SAS port shall not stop the Arbitration Wait Time timer and shall not set the Arbitration
Wait Time timer to zero when the SAS port receives an OPEN_REJECT (RETRY).
BROADCAST ASYNCHRONOUS EVENT bit
0 A BROADCAST ASYNCHRONOUS EVENT bit set to zero specifies that the device server shall disable origination of BROADCAST
(ASYNCHRONOUS EVENT).
1 A BROADCAST ASYNCHRONOUS EVENT bit set to one specifies that the device server shall enable origination of BROADCAST
(ASYNCHRONOUS EVENT).
READY LED MEANING bit
The READY LED MEANING bit specifies the READY LED signal behavior. Regardless of the mode page policy (see 5.4.14) for this mode page, the
shared mode page policy shall be applied to the READY LED MEANING bit.
PROTOCOL IDENTIFIER field
The PROTOCOL IDENTIFIER field is defined in 5.3.23 and shall be set to the value defined in table 410 indicating that this is a SAS specific mode
page.
I_T NEXUS LOSS TIME field
The I_T NEXUS LOSS TIME field contains the time that the 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. table 417 defines the values of the
I_T NEXUS LOSS TIME field. If this mode page is not implemented, the I_T nexus loss time is vendor specific. This value is enforced by the port layer.
Table 411 I_T NEXUS LOSS TIME values
INITIATOR RESPONSE TIMEOUT field
The INITIATOR RESPONSE TIMEOUT field contains the time in milliseconds that the SSP target port shall wait for the receipt of a frame (e.g., a
write DATA frame) before aborting the command associated with that frame. An INITIATOR RESPONSE TIMEOUT field value of zero indicates
that the SSP target port shall disable the initiator response timeout timer. If this mode page is not implemented, the logical unit shall not
implement an initiator response timeout timer. This value is enforced by the transport layer.
REJECT TO OPEN LIMIT field
The REJECT TO OPEN LIMIT field contains the minimum time in 10 μs increments that the target port shall wait to establish a connection
request with an initiator port on an I_T nexus after receiving an OPEN_REJECT (RETRY), OPEN_REJECT (RESERVED CONTINUE 0), or OPEN_RE
-
JECT (RESERVED CONTINUE 1). This value may be rounded as defined in 2.3. A REJECT TO OPEN LIMIT field set to 0000h indicates that the mini-
mum time is vendor specific. This minimum time is enforced by the port layer.
MAXIMUM ALLOWED XFER_RDY field
The MAXIMUM ALLOWED XFER_RDY field specifies the maximum number of times a device server may call the Receive Data-Out transport pro-
tocol service as described in 9.2.1.8. A MAXIMUM ALLOWED XFER_RDY field set to zero specifies that there is no limit to the number of times a
device server may call the Receive Data-Out transport protocol service.
Code Description
0000h
Vendor-specific amount of time.
0001h to FFFEh
Time in milliseconds.
FFFFh
The SSP target port shall never recognize an I_T nexus loss
(i.e., it shall retry the connection requests forever).