Scrambling | Fujitsu MBA3300RC, MBC2036RC, MBC2073RC, MBA3147RC

SAS Interface

1.4.7 Scrambling

Scrambling is used to reduce the probability of long strings of repeated patterns appearing on the physical link.

All data dwords are scrambled. Table 1.17 lists the scrambling for different types of data dwords.

Table 1.17 Scrambling for different data dword types

connection state	Data dword type	Description of scrambling

Outside connections	SAS idle dword	When a connection is not open and there are no
		other dwords to transmit, vendor-specific
		scrambled data dwords shall be transmitted.

	Address frame	After an SOAF, all data dwords shall be
		scrambled until the EOAF.

Inside SSP	SSP frame	After an SOF, all data dwords shall be
connection		scrambled until the EOF.

	SSP idle dword	When there are no other dwords to transmit,
		vendor-specific scrambled data dwords shall be
		transmitted.

To generate scrambled values that are to be encoded and transferred on the physical link layer, dwords to be sent are XOR-ed with the predefined pattern. If there is no transmission error, the received data of the dwords is XOR-ed with the same pattern after being decoded so that the dword values of the original data can be obtained.

The pattern that is XOR-ed with the data dwords is defined by the output of a linear feedback shift register implemented with the following polynomial:

G(x) = x 16 + x 15 + x 13 + x 4 + 1

The value of the linear feedback shift register shall be initialized at each SOF and SOAF to FFFFh.

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C141-C013

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Fujitsu MBA3300RC, MBC2036RC, MBC2073RC, MBA3147RC, MBA3073RC specifications Scrambling for different data dword types

Contents

C141-C013-01EN For Safe Operation Handling of This Manual Revision History This page is intentionally left blank Overview of Manual Glossary Sense Data and Error Recovery MethodsDisk Media Management Acronyms and Abbreviations Conventions Used in this Manual Conventions for Alert Messages Manual Organization Referenced Standards Ansi Contents Contents Command Processing 103 127 Command SpecificationsData Buffer Management 135 Parameter Data Format 281 Sense Data and Error Recovery Methods 359 382 Termination status analysis and error recovery methods374 384 Glossary 417 Acronyms and Abbreviations 419 Index 421 Figures Tables 100 107 226 311 Total unrecoverable verify errors posted to Init SAS Interface Topologies in SAS Interface SAS Interface SAS Layering Topologies in SAS Interface Physical links and phys Ports narrow ports and wide ports Ports narrow ports and wide ports SAS devices SAS devices Pathways Example of potential pathways Connections Names and identifiers Names and identifiersSAS addresses SAS address format Hashed SAS address Hashed SAS address code parameter Phy layer Phy layer1 8b10b coding Usage of special characters Link reset sequence Reset-related terminology OOB signal timing specifications Start conditions of the link reset sequenceOut of band OOB signals Comsas OOB signal transmitter requirementsCOMINIT/RESET OOB signal receiver idle time detection requirements OOB signal receiver burst time detection requirementsCOMINIT/COMRESET OOB signal receiver negation time detection requirements SAS OOB sequency 3 4 n Scenario 2 SAS phy a starts SAS OOB sequence Scenario 3 SAS phy B misses SAS phy As Cominit SAS speed negotiation sequence ∙ When the Cominit signal cannot be detected∙ When the Comsas signal cannot be detected Exception handling in the OOB sequence SAS speed negotiation sequence timing specifications 11 SAS speed negotiation window SAS Interface 12 SAS speed negotiation sequence Example Phy reset sequence after devices are attached 14 Phy reset sequence Example Exception handling in the speed negotiation sequence When the speed negotiation sequence is successfulPhy layer dword synchronization DWS 10 Primitives not specific to type of connection 1/2 Link layerPrimitives Link layer 10 Primitives not specific to type of connection 2/2 11 Primitives used only inside SSP and SMP connections 12 Primitive sequences Primitive sequencesPrimitives not specific to type of connections AIP Arbitration in progress Break Broadcast Close ErrorHardreset Eoaf End of address frame Openreject NotifyOpenaccept 13 Openreject abandon primitives Supported 14 Openreject retry primitives No Destination Soaf Start of address frame Done Primitives used only inside SSP and SMP connectionsACK acknowledge 15 Done primitives Rrdy EOF End of frameNAK negative acknowledgement SOF Start of frame 16 Clock skew management Align insertion requirement Clock skew managementIdle physical link Scrambling 17 Scrambling for different data dword types Address frames Address framesAddress frames overview 18 Address frame format 20 Device Type field Identify address frame19 Identify address frame format PHY Identifier Device TypeSAS Address 22 Protocol field Open address frame21 Open address frame format SMP 23 Connection Rate field ∙ Initiator Connection TAG 24 Arbitration Wait Time field∙ Connection Rate ∙ Pathway Blocked Count Identification and hard reset sequence∙ Destination SAS Address ∙ Arbitration Wait Time Connections overview Connection request Arbitration fairness Connection responses25 Connection responses Bits 79-64 79 is MSB Bits 63-0 0 is LSB Aborting a connection request 27 Abort connection responses Close Closing a connection28 Close connection responses Rate matching Breaking a connection29 Break connection responses SSP link layer 30 Rate matching Align and/or Notify insertion requirements Creditblocked SSP frame transmission and receptionSSP flow control Interlocked frames 31 SSP frame interlock requirements 17 Interlocked frames 18 Non-interlocked frames with the same tag 20 Closing an SSP connection example 32 SSP frame format Transport layerSSP frame format Nodata Transport layer33 Frame Type field Responsedata SAS Interface Information units Command information unit34 Command information unit Head of Queue 35 Task Attribute fieldSimple Ordered Transport layer Task information unit 36 Task information unit 37 Task Management Function field Abort Task SET 38 Xferrdy information unit Response DataXferrdy information unit 39 An example of requested offset Requested Offset Write Data Length 21 Example of Xferrdy frames Data information unit 40 Data information unit SAS Interface TOO Much Write Data 42 Datapres field Response information unit41 Response information unit ∙ Response information unit Nodata format ∙ Response information unit Responsedata format ∙ Response information unit Sensedata format 43 Response Data field44 Response Code field Transport layer Sequences of SSP frames 22 Example of Task frame 23 Example of write command Exceptional event processing of a drive Transport layer 45 Exceptional event processing of a drive 1/2 Clear Task SET Management Function Complete 45 Exceptional event processing of a drive 2/2 102 C141-C013 Command Processing Command Format 10-Byte CDB basic format Command Processing6-Byte CDB basic format Operation code Bit Byte Operation CodeControl Byte Operation code Logical block address Transfer data length Control byte Command FormatControl byte Handling an illegal CDB Good status Status ByteStatus Check Condition status Busy status Command Terminated statusCondition MET Status Intermediate status Command Queuing Function READ, Read EXTENDED, WRITE, Write Extended Unit Attention Condition When a Power On or Reset occursWhen I-T Nexus Loss occurs Generation of the Unit Attention condition Commands cleared by another Init Logical Unit Reset Report Luns command Inquiry commandRequest Sense command Sense Data Hold State Power Condition ∙ ActiveWait state LED Display ∙ Commands that can be executed even in the Not Ready state∙ Operation when formatting is not completed normally LED Display LED display Command Processing ExceptionsOverlapped tag Illegal LUN specification Command Processing Exceptions Outline of disk drive error recovery processing Error recovery processingRecovery procedures for disk drive errors Reserved operation code ∙ Nexus Abort processingComparison between SAS and Scsi about definition Hard Reset ∙ Abort processing during write operation 10 Reset processing during write Unrecoverable hardware errors Fatal hardware errorsSelf-diagnostic errors Data Block Addressing Data Block Addressing Data space configuration Logical block addressing User space logical block addresses Alternate area Data buffer configuration and basic operation Data Buffer Data Buffer Management Read operation Data Buffer Write operation Caching operation Look-Ahead Cache FeatureCaching object commands Read Read Extended − Write − Write Extended − Write and Verify Look-Ahead Cache FeatureDisabling caching data Data Buffer Management Look-Ahead operation, Look-Ahead volume Caching parameters This page is intentionally left blank Control/Sense Commands Test Unit Ready Command Specifications Inquiry Control/Sense Commands Standard Inquiry data Fujitsu Version field Command Specifications Command queuing SAM2 Version descriptorByte OX0B, Oxfc SAS Command support data Support VPD information VPD information VPD identifier list VPD information device serial No MSB 10 VPD information device unique information 1/2PIV 10 VPD information device unique information 2/2 MBS Code SET Command Specifications Read Capacity 11 Read Capacity data Mode Select Command Specifications Mode Select parameter structure Command Specifications 12 Mode Select command Group 0 parameter configuration 1/2 12 Mode Select command Group 0 parameter configuration 2/2 SPF Control/Sense Commands Command Specifications 13 Mode Select parameters Command Specifications Mode Select Extended Byte Sub Page Descriptor Bit Byte Mode Sense 1A 15 Mode 16 Mode Sense data type specifications Control/Sense Commands 17 Mode Sense command group 0 parameter configuration 1/2 17 Mode Sense command group 0 parameter configuration 2/2 Header Block descriptor Descriptor Control/Sense Commands Mode Sense Extended 5A Header Bit Byte 176 C141-C013 Rezero Unit START/STOP Unit 1B Control/Sense Commands Reserve Logical unit reserve function Reserve right and third party reserve function Reserve Extended Release object and third party release function ReleaseRelease function Release Extended Request Sense Command Specifications LOG Select 4C 20 LOG Select command parameter configuration 19 PC page control Length Code21 Page code Parameter code 22 Log parameterTSD ETC TMC Byte Lbin LOG Sense 4D 23 Page Code assignment for the log pages Log parameters Persistent Reserve in 5E Read Keys Persistent Reserve in service actions24 Persistent Reserve in service actions Read Reservation LSB MSB Persistent Reserve in parameter data for Read Keys25 Persistent Reserve in parameter data for Read Keys Persistent Reserve in parameter data for Read Reservations Format of the Reservation descriptors is defined in Table ∙ Persistent reservations type ∙ Persistent reservations scope28 Persistent reservations scope 29 Persistent reservations type codes Persistent Reserve OUT 5F Command Specifications Persistent Reserve OUT service actions 30 Persistent Reserve OUT service action codes Aptpl Persistent Reserve OUT parameter list31 Persistent Reserve OUT parameter list Control/Sense Commands Command Specifications Report Luns A0 Persistent Reserve 33 Report Luns parameter data Report Device Identifier A3 34 Report Device Identifier parameter data SET Device Identifier A4 35 SET Device Identifier parameter data Read Data Access CommandsData Access Commands Command Specifications Read Extended FUA Write 0A Data Access Commands Write Extended 2A Write and Verify 2E Verify 2F Seek 0B Seek Extended 2B Synchronize Cache Format Commands Format Unit Format Commands Defect list Specifying the initialization method 36 Defect list format FOV 37 Format Unit command parameter list configurationFormat parameters Stpf Command Specifications Format Commands 38 Defect descriptor byte distance from index format 39 Defect descriptor physical sector address format Command Specifications 40 Format Unit command defect processing 1/2 Defect processing during initialization 40 Format Unit command defect processing 2/2 Reassign Blocks Bit Byte X07 41 Reassign Block command defect data list configuration = Hardware Error Correction of the defect descriptor 42 Defect data type Bit Byte X37 PList GListTransfer Byte Length MSB Transfer Byte Length LSB 44 Read Defect Data command defect data configuration 43 Defect data format Defect descriptor list 45 Defect data conditions Format Commands Read Defect Data B7 46 Read Defect Data command B7 defect data configuration Maintenance, Diagnostic Commands Self-diagnosis test 47 Self-diagnosis test Parameter specification PER DTE Maintenance, Diagnostic Commands PHY Test 49 Send Diagnostic command parameter list configuration50 Page code 51 Send Diagnostic parameters page code list 52 Send Diagnostic parameters PHY Test function Maintenance, Diagnostic Commands Command Specifications 54 Specifying address format Logical unit Self-Test 55 SELF-TEST Receive Diagnostic Results 1C Parameters Code list 57 Receive Diagnostic Results response data page code list Logical/physical address conversion 59 Address format Write Buffer 3B 60 Write Buffer transfer mode 61 Write Buffer command buffer data mode = 000 Mode = 0, 0, 0, 1 Header + data, with address specification Mode = 0, 1, 0, 1 Microcode download, with saving Mode = 0, 0, 1, 0 Data only, with address specificationMode = 0, 1, 0, 0 Microcode download, without saving Maintenance, Diagnostic Commands Command Specifications Mode = 1, 0, 1, 0 Echo buffer 62 Read Buffer transfer mode Read Buffer 3C 63 Read Buffer command buffer data mode = 0000 Mode = 0, 0, 0, 1 Header + data, with address specification Mode = 0, 0, 1, 1 Buffer descriptor 64 Read Buffer command buffer descriptor Ebos Mode = 1, 0, 1, 1 Echo buffer descriptor65 Read Buffer command echo buffer descriptor Read Long 3E 05 = Illegal Request Write Long 3F Command Specifications Write Same Command Specifications Mode Parameters Parameter Data Format Parameter Data Format Read/Write Error Recovery Parameters Page Code =Mode Select parameters read/write error recovery parameters Write Extended Write Long Write Same Mode ParametersRead Read Extended Read Long Parameter Data Format Mode Parameters Combinations of error recovery flags EER PER DTE DCR Mode Select parameters disconnect/reconnect parameters Disconnect/Reconnect Parameters Page Code = Parameter Data Format Mode Select parameters format parameters Format Parameters Page Code = Parameter Data Format Mode Parameters Parameter Data Format C141-C013 293 Mode Select parameters drive parameters Drive Parameters Page Code = Mode Parameters Verify Verify Error Recovery Parameters Page Code =Mode Select parameters verify error recovery parameters Mode Parameters Mode Select parameters caching parameters Caching Parameters Page Code = Mode Parameters Parameter Data Format Mode Parameters Parameter Data Format Mode Parameters Control Mode Parameters Page Code = 0A Mode Select parameters control mode parameters Mode Parameters TAS task aborted status not supported Mode Parameters 10 Mode Select parameters notch parameters Notch Parameters Page Code = 0C Mode Parameters Port Control Parameter Page Code = 11 Port control parameter Page 0 Format Short Page Format Number of Phys Code Description12 Port control parameter Sub Page Format Long Format 13 SAS phy mode descriptor format This page cannot be modified Parameter Data Format C141-C013 315 Power Condition Parameter Page Code = 1A 14 Power condition parameter Page 0 Format Short Page Format 15 Mode Select parameters informational exception control Informational Exceptions Control Page Page Code = 1C Parameter Data Format Mode Parameters 16 Mrie 1/2 17 Interval timer 16 Mrie 2/2 Ffff Background Control Mode Parameter Page Code = 1C/subpage =18 Mode Select parameters background control mode parameter Pre-Scan is disabled Parameter Data Format Additional Error Recovery Parameters Page Code = Fujitsu unique parameter 20 Mode parameter default values 9A 0A 00 00 FF FF FF FF FF FF FF FF 21 Log parameter format Log ParametersLog Parameters Parameter Data Format Support Log 22 Support log ETC TMC Buffer Overrun/Underrun23 Buffer overrun/underrun Write Error Count 24 Write error count Write errors recovered with possible delays page 02, code Write errors recovered without delays page 02, code25 Write errors recovered without delays page 02, code Total recoverable write errors posted to Init page 02, code Total write errors posted page 02, code27 Total write errors posted page 02, code TSD ETC Total write bytes processed page 02, code 29 Total write bytes processed page 02, code Read errors recovered without delays page 03, code Read Error Count31 Read error count 32 Read errors recovered without delays page 03, code Total read errors posted page 03, code Read errors recovered with possible delays page 03, code33 Read errors recovered with possible delays page 03, code 34 Total read errors posted page 03, code 36 Total read bytes processed page 03, code Total recoverable read errors posted to Init page 03, codeTotal read bytes processed page 03, code Verify Error Count 38 Verify error count Verify errors recovered with possible delays page 05, code Verify errors recovered without delays page 05, code39 Verify errors recovered without delays page 05, code TSD ETC TMC Lbin Total verify errors posted page 05, code 41 Total verify errors posted page 05, code Total verify bytes processed page 05, code 43 Total verify bytes processed page 05, code 45 Non-medium error count Non-Medium Error CountTemperature Page X0D 46 Temperature page X0D Reference temperature page 0D, code Temperature page 0D, code47 Temperature page 0D, code 48 Reference temperature page 0D, code Date of manufacture page 0E, code Start-Stop Cycle Counter Page X0E49 Start-stop cycle counter page X0E 50 Date of manufacture page 0E, code Specified cycle count over device lifetime page 0E, code Accounting date page 0E, code51 Accounting date page 0E, code 52 Specified cycle count over device lifetime page 0E, code Start-stop cycle counter page 0E, code 53 Start-stop cycle counter page 0E, code Application Client Page X0F 54 Application client page X0F Self-test result parameter data page 10, code Self-Test Result56 Self-test result 57 Self-test result parameter data page 10, code 58 Self-test results values 60 Background medium scan status parameter Background Medium Scan59 Background medium scan 61 BMS status 63 Reassign status 62 Background medium scan parameterMSB LBA LSB Protocol Specific Port Log 64 Protocol specific port log page format ETC TMC Lbin Details of the log parameter65 Log parameter format Init Log Parameters Parameter Data Format 66 Smart status page X2F Smart Status Page X2FSmart Data 67 Smart data This page is intentionally left blank Sense Data Sense data format ILI Sense Data and Error Recovery MethodsSense data format Sksv Sense data basic information Additional Sense code, Additional Sense code Qualifier Command inherent informationAdditional sense data length Sense key inherent information Sksv MSB Recovered Error Sense key Enable Spinup Sense Data and Error Recovery Methods Init Sense Data and Error Recovery Methods Sense Data Sense Data and Error Recovery Methods CDB operation code Sense data additional informationPort Detailed information Init Error Recovery Methods Recommended Termination status analysis and error recovery methods Init Error Recovery Methods Recommended Command completion wait time-out Sense data analysis and error recovery methods Sense data error classification 1/3 Sense data error classification 2/3 Sense data error classification 3/3 Error recovery processing procedures 1/4 Error recovery processing procedures 2/4 Spinup Error recovery processing procedures 3/4 Error recovery processing procedures 4/4 Error states and retry processing procedures Disk Drive Error Recovery ProcessingError logging Seek error Read error in uncorrectable data Disk Drive Error Recovery ProcessingWrite error Correctable data read error Other internal HDD errors Auto alternate block allocation processing Disk Drive Error Recovery Processing Error recovery processing control Disk drive errors and number of retries Sense Data and Error Recovery Methods Defect Management Defect lists Disk Media Management Alternate block allocation Defect Management Disk Media Initialization Initialization during installationIssuing the Mode Select command Re-initialization Issuing the Format Unit commandMode Select command Disk Media Initialization Format Unit command Alternate Block Allocation Processing Alternate Block Allocation Processing Background Media Scan BMS Background Media Scan BMS modePre-Scan mode Overview ∙ PER Write command operation during a Pre-ScanBackground Media Scan BMS Conditions for operation Mode Page 0x1C SubPage 0x01 Background Control Mode Mode Background Media Scan BMS Background Media Scan Log Background Media Scan Log Page format BMS Status parameter format Medium Scan parameter format Background Media Scan BMS Drive Self-Test DST Drive Self-Test DST Foreground modeSelf-test modes Background mode Extended self-test Matters that are common to both modesShort self-test Test segments Disk Media Management Drive Self-Test DST Smart Self-Monitoring Analysis and Reporting Technology Data analysis Smart Self-Monitoring Analysis and Reporting Technology ASC Ascq Failure prediction methodSmart ASC/ASCQ Smart Self-Monitoring Analysis and Reporting Technology Disk Media Management Smart thresholds Reporting function Additional Sense Code CommandCommon Command Set CCS Initiator Init This page is intentionally left blank ALT ACKAEN Arre Acronyms and Abbreviations Index Command Terminated Index Details of parameters on Mode Intermediate Condition Mode Sense Extended Persistent Reserve OUT Reservation Conflict Receive DiagnosticReport Device Identifier SET Device Identifier TB284 READER’S Comment Form This page is intentionally left blank C141-C013-01EN Page