User manual MAXTOR SERIAL ATTACHED SCSI

[. . . ] Users Guide Serial Attached SCSI (SAS) Interface Manual Users Guide Serial Attached SCSI (SAS) Interface Manual ©2003, 2004, 2005, 2006 Seagate Technology LLC All rights reserved Publication number: 100293071, Rev. B May 2006 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology LLC. SeaTools, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either registered trademarks or trademarks of Seagate Technology LLC. Other product names are registered trademarks or trademarks of their owners. [. . . ] B Tim e Redundant prim itive sequenc e B Rec eiver detec ts Figure 23 shows examples of redundant primitive sequences. 59 4. 2. 5 4. 2. 5. 1 Primitives not specific to type of connections AIP (Arbitration in progress) AIP is sent by an expander device after a connection request to indicate that the connection request is being processed and indicate the status of the connection request. The versions of AIP representing different statuses are defined in table 20. Primitive AIP (NORMAL) AIP (RESERVED 0) AIP (RESERVED 1) AIP (RESERVED 2) AIP (WAITING ON CONNECTION) AIP (WAITING ON DEVICE) AIP (WAITING ON PARTIAL) AIP (RESERVED WAITING ON PARTIAL) AIP primitives Description Expander device has just accepted the connection request. Expander device has determined the routing for the connection request, but the destination phys are all being used for connections. Expander device has determined the routing for the connection request and forwarded it to the output physical link. Expander device has determined the routing for the connection request, but the destination phys are all busy with other partial pathways (i. e. , connection requests that have not reached the destination phy). Processed the same as AIP (WAITING ON PARTIAL). See 4. 9. 1 for details on connections. character and dword alignment during the speed negotiation sequence; c. ALIGN primitives Description Used for OOB signals, the speed negotiation sequence, clock skew management and rate matching. Used for the speed negotiation sequence, clock skew management and rate matching. Used for clock skew management and rate matching. Primitive ALIGN (0) ALIGN (1) ALIGN (2) ALIGN (3) 60 Serial Attached SCSI (SAS) Interface Manual, Rev. B Phys shall use ALIGN(0) to construct OOB signals as described in 3. 4. Phys shall use ALIGN(0) and ALIGN(1) during the speed negotiation sequence as described in 3. 5. 2. 2. Phys shall rotate through ALIGN (0), ALIGN (1), ALIGN (2), and ALIGN (3) for all ALIGNs sent after the phy reset sequence for clock skew management (see 4. 3) and rate matching (see 4. 9. 2). Phys receiving ALIGNs after the phy reset sequence shall not verify the rotation and shall accept any of the ALIGNs at any time. Phys shall only detect an ALIGN after decoding all four characters in the primitive. For clock skew management and rate matching, ALIGNs may be replaced by NOTIFYs (see 4. 2. 5. 9). 4. 2. 5. 3 BREAK BREAK is used to abort a connection request or break a connection. 4. 2. 5. 4 BROADCAST BROADCASTs are used to notify all SAS ports in a domain of an event. The versions of BROADCAST representing different reasons are defined in table 22. Primitive BROADCAST (CHANGE) BROADCAST (RESERVED CHANGE 0) BROADCAST (RESERVED CHANGE 1) BROADCAST (SES)) BROADCAST primitives Description Notification of a configuration change. Processed the same as BROADCAST (CHANGE) by SAS ports (i. e, SAS initiator ports and SAS target ports). [. . . ] The PROGRAMMED MINIMUM PHYSICAL LINK RATE field and defined in the SMP PHY CONTROL function (see SAS). 6. 1. 3. 3 Protocol-Specific Logical Unit mode page PROGRAMMED MAXIMUM PHYSICAL LINK RATE field are SSP logical units shall not include the Protocol-Specific Logical Unit mode page (see SPC-4). 6. 1. 4 6. 1. 4. 1 SCSI log parameters Protocol-Specific log page The Protocol Specific log page for SAS defined in table 66 is used to report errors that have occurred on the SAS target device's phy(s). Table 66. Byte\Bit 0 1 2 3 Protocol-specific log parameters 4 First protocol-specific log parameter (MSB) PAGE LENGTH (m - 3) Protocol-Specific log page for SAS 7 Reserved Reserved 6 5 4 3 PAGE CODE 2 (18h) 1 0 (LSB) . . . . . . m nth protocol-specific log parameter The PAGE CODE field shall be set to 18h. [. . . ]