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SAS Interface
48 C141-C013
Phys shall use ALIGN (0) to construct OOB signals as described in 6.6. Phys shall
use ALIGN (0) and ALIGN (1) during the speed negotiation sequence as
described in 6.7.4.2. Phys shall rotate through ALIGN (0), ALIGN (1), ALIGN
(2), and ALIGN (3) for all ALIGNs sent after the phy reset sequence.
1.4.3.3 BREAK
The BREAK primitive is used to cancel the connection request, or to cancel the
connection. The BREAK primitive is sent in cases 1) to 4) shown below.
1) When the connection request is to be canceled after sending an OPEN frame
2) When neither OPEN_ACCEPT nor OPEN_REJECT primitive is received
within 1 ms of sending an OPEN frame
3) When neither a DONE primitive nor an SSP frame is received within 1 ms of
sending a DONE primitive
4) When a CLOSE primitive is not received within 1 ms of sending a CLOSE
primitive
When the BREAK primitive is sent in any of the cases above, the BREAK timer
(1 ms) is started in anticipation of the reception of the BREAK primitive within 1
ms. If the BREAK primitive is not received within 1 ms, the connection is
regarded as having been closed.
After the BREAK primitive is sent, when any primitives and/or frames other than
the BREAK primitive are received, all of these (except NOTIFY primitives) are
discarded.
When the BREAK primitive is not received within 1 ms of sending the BREAK
primitive, a drive may start the link reset sequence.
1.4.3.4 BROADCAST
BROADCASTs are used to notify all SAS ports in a domain of an event.
When an expander port receives a BROADCAST it shall transmit the same
BROADCAST on at least one phy in all other expander ports. BROADCAST shall
only be sent outside of connections after the phy reset sequence has completed.
BROADCAST (CHANGE) is sent by an expander device to notify SAS INIT
ports and other expander devices that a configuration change has occurred.
BROADCAST (CHANGE) may also be transmitted by SAS INIT ports.
BROADCAST (CHANGE) shall be ignored by SAS TARG ports.
BROADCAST (SES) is sent by a SAS TARG port to notify SAS INIT ports that
an asynchronous event has occurred in an enclosure, and SSP INIT ports should
poll all the SCSI enclosure services logical units in the SAS domain.
BROADCAST (SES) shall be ignored by SAS TARG ports.
The drive ignores all received BROADCAST primitives.