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SAS Interface
64 C141-C013
The COMPATIBLE FEATURES field is set to zero. The destination device
ignores the COMPATIBLE FEATURES field.
The PATHWAY BLOCKED COUNT field specifies the number of times the port
has retried this connection request due to receiving OPEN_REJECT (PATHWAY
BLOCKED). The port shall not increment the PATHWAY BLOCKED COUNT
value past FFh. If the port changes connection requests, it shall use a PATHWAY
BLOCKED COUNT of 00h.
The ARBITRATION WAIT TIME field specifies how long the port transmitting
the OPEN address frame has been waiting for a connection request to be accepted
or rejected. This time is maintained by the port layer in an Arbitration Wait Time
timer. For values from 0000h to 7FFFh, the Arbitration Wait Time timer
increments in one microsecond steps. For values from 8000h to FFFFh, the
Arbitration Wait Time timer increments in one millisecond steps. The maximum
value represents 32767 ms + 32768 µs. Table 1.24 describes several values of the
ARBITRATION WAIT TIME field.
Table 1.24 ARBITRATION WAIT TIME field
Code Description
0000h
0 µs
0001h
1 µs
... ...
7FFFh
32 767 µs
8000h
0 ms + 32 768 µs
8001h
1 ms + 32 768 µs
... ...
FFFFh
32 767 ms + 32 768 µs
The MORE COMPATIBLE FEATURES field shall be set to zero. The
destination device shall ignore the MORE COMPATIBLE FEATURES field.
The contents of an OPEN address frame sent by a drive are as follows:
• INITIATOR PORT bit: 0b
• PROTOCOL: 001b
• CONNECTION RATE:
The CONNECTION RATE value when an initiator makes a connection request
• INITIATOR CONNECTION TAG:
The INITIATOR CONNECTION TAG value when an initiator makes a
connection request