Command Descriptor Block, Bit Byte, Description, Msb | Maxtor 10K V

5.2Command Descriptor Block

An initiator communicates with the drive by sending a 6-, 10-, or 12-byte Command Descriptor Block (CDB) that contains the parameters for the specific command. The SCSI command's operation code is always the first byte in the CDB and a control field is the last byte. For some commands, the CDB is accompanied by a list of parameters sent during the data-out buffer transfer. Table 5-2 shows the format of a typical six- byte CDB.

Table 5-2Typical (6-Byte) Command Descriptor Block-Data Format

Bit	7	6	5	4		3	2		1	0
Byte	7	6	5	4		3	2		1	0
Byte
0				Operation Code

1		Reserved		(MSB)		Logical Block Address
1		Reserved				Logical Block Address				(LBA)
										(LBA)

2 - 3				Logical Block Address
2 - 3					(LBA)
					(LBA)

4		Transfer Length, Parameter List Length, or Allocation Length

5					Control

Note: Reserved fields in CDBs and Parameters have a value of 0; Re- served fields in states and other parameters sent to an initiator are set to 0.

Table 5-3 contains a description of the CDB fields.

Table 5-4 describes the data format for a typical CDB.

	Table 5-3Command Descriptor Block-Field Descriptions

Field			Description

Operation Code		The first byte of a SCSI CDB contains an operation code. The operation code of the CDB has
		a Group Code field (bits 7-5) and a Command Code field (bits 4-0). The 3-bit Group Code field
		provides for eight groups of command codes. The 5-bit Command Code field provides for 32
		command codes in each group. A total, therefore, of 256 possible operation codes exist. Oper-
		ation codes are defined in the SCSI command standards. The group code for CDBs specified
		therein correspond to the length of the command descriptor as below:

		Group Code		Meaning

		0		6-byte commands

		1		10-byte commands

		2		10-byte commands

		3		Reserved

		4		16-byte commands

		5		12-byte commands

		6		Vendor specific

		7		Vendor specific

		The operation code specifies the command being requested. The list of supported SCSI com-
		mands and their operation codes are contained in Table 5-1.

5-4 Maxtor Atlas 10K V

Image 62

Maxtor 10K V manual Command Descriptor Block, Bit Byte, Description, Msb, Lba

Contents

Maxtor Atlas 10K Product Manual UL/CSA/VDE/TUV Before You Begin Regulatory Statements Table of Contents Specifications Page Feature Descriptions Negotiated Rate Information page Reference List of Figures List of Tables Command Support Data Page Command or Operation Codes Persistent Reservation in Command Descriptor 114 Persistent Reservation OUT Command Descriptor 106 136 About this Manual Audience Manual Organization Terminology and Conventions Asic Mode Select References KEY Features Product Overview Maxtor Atlas 10K Reliability Regulatory Compliance Standards Hardware Requirements Product EMI/EMC Qualifications Handling SAFETY, HANDLING, & Electrostatic Discharge ProtectionSafety Precautions Electrostatic Discharge ESD Protection Shows The Mechanical Dimensions of the drives Space Requirements Shock Feet Unpacking Instructions 2Drive Packing Assembly Jumper Options on the 68-Pin Wide PCB Configuration Jumpers and ConnectionsHardware Options Pin Power Connector Pin Option Pin Scsi Scsi ID Maxtor Atlas 10K V drives have three Spin Up modes SCA-2 80-Pin Connector Versions 4Pin Locations on SCA-2 Connector Location on SCA Connector Staggerspin Delayspin Interface Connector J1 Shows the various connector styles Maxtor Atlas 10K V 1 68-Pin Wide Scsi Connector LVD Signal Name Connector Contact Number Cable Conductor 580-Pin SCA-2 LVD Pin Assignments 2 80-Pin SCA-2 Scsi Connector LVDPIN Connector Contact Signal Name Cable Conductor Number 2.1 80-Pin SCA-2 Mating Connectors 3 68-Pin Wide Single-Ended Scsi Connector 668-Pin Wide Single-Ended Pin Assignments 4 80-Pin SCA-2 Single-Ended Scsi Connector Drive Mounting and Installation Orientation Mounting Screw Clearance 7Mounting Screw Clearance for Maxtor Atlas 10K V Drive Mounting Ventilation 9Crosswise Airflow Cooling Specifications Specification Summary Scsi ‘Hard’ Reset Time6 Ms typical Formatted Capacity Timing Specifications Data Transfer Rates Power Reset Limits PowerPower Sequencing Drive Power Dissipation Operation Acoustics Acoustic Toned Quality Mechanical Environmental Conditions 2 ESD Electromagnetic Conditions1 EMI/RFI Susceptibility Sensitivity to Magnetic Fields Reliability Disk Errors9Error Rates Overview of the Scsi Command Descriptions Persistent Reservation OUT Receive Diagnostic ResultsSend Diagnostic Read BufferPage Description Command Descriptor BlockBit Byte MSB Field Description Indicate the number of sectors to be transferred Naca Status Definition Meaning Status/Error ReportingLinked Commands Page Data Transfer Command Components 8DATA-Phase Command Contents Reassign DiagnosticRead Defect Blocks Receive Scsi Command Descriptions Common Fields 10CHANGE DEFINITION-Field Descriptions 9CHANGE Definition Command Descriptor Block-Data FormatChange Operating Definition 40h Format Unit Command 04h 11FORMAT Unit Command Descriptor Block-Data Format 12FORMAT Unit Command-Field Descriptions Format Unit Parameter List Five Forms of Format Unit Commands13FORMAT Unit Command Supported Options 14FORMAT Unit Parameter List-Data Format FOV Dpry 15 .FORMAT Unit Defect List Header-Data Format16FORMAT Unit Defect List Header-Field Descriptions DSP 17FORMAT Unit Defect Descriptor-Block Format 19FORMAT Unit Initialization Pattern Descriptor-Data Format Initialization Pattern Type Description 21FORMAT Unit Initialization Pattern TypeName Description 23 Inquiry Command Descriptor Block-Field Descriptions Inquiry Command 12h22INQUIRY Command Descriptor Block-Data Format Evpd Byte Bit Standard Inquiry Data24Standard Inquiry Data Page-Data Format QAS 25Standard Inquiry Data Page-Field DescriptionsField Name Value Description 27Vital Product Data-Page Codes Vital Product Data Pages26Supported Vital Product Data Pages -Data Format 28Unit Serial Number Page-Data Format 30Implemented Operating Definition Page-Data Format 31Implemented Operating Definition Page-Field Descriptions 32ASCII Implemented Operating Definition Page Data Format 33Device Identification Page Data Format LSB 35Command Support Data Page-Data Format34Device Identification Page Field Description 36Command Support Data Page-Field Descriptions OpCode Command Support 37Command Support Data Page Command or Operation CodesHex Data Returned When Inquiry is Received and CmdDt Bit Version Length RES. OUT PersistRES. 39LOG Select Command Descriptor Block-Field Descriptions LOG Select Command 4Ch38LOG Select Command Descriptor Block-Data Format PCR Code Description LOG Sense Command 4Dh40 Disk Drive Log Pages 42LOG Sense Command Descriptor Block-Field Descriptions LOG Sense Command Descriptor Block41LOG Sense Command Descriptor Block-Data Format Reset TSD ETC LOG Sense Log Pages43LOG Sense Log Page Format-Data Format Lbin 46Generic Log Parameter-Field Descriptions 47MODE Select 6 Command Descriptor Block-Data Format Mode Select 6 Command 15hInitiator-Changeable Mode Pages 48MODE Select 6 Command Field Descriptions 49Initiator-Changeable Mode Pages Code Name Function Size Bytes 50 Mode Page Types Mode Page TypesMode Parameter List 51Mode Parameter List-Data Format 54Mode Parameter Header- Field Descriptions 52Mode Parameter List-Field Descriptions53Mode Parameter Header 6-Byte-Data Format 55Mode Parameter Block Descriptor-Data Format Unit Attention Condition Page 00h 56 Mode Parameter Block Descriptor-Field DescriptionsCategories of Changeable Pages 57Categories of Changeable Pages Field Default Value Description Read-Write Error Recovery Page 01h60Read-Write Error Recovery Page-Page 59Unit Attention Condition Awre 61Read-Write Error Recovery Page Field DescriptionsDefault Description Field Default Description 63 Disconnect-Reconnect-Field Descriptions Disconnect-Reconnect Page 02h62Disconnect-Reconnect EER PER Verify Error Recovery Page 07h64Verify Error Recovery Page-Page 66Caching Page-Page 65Verify Error Recovery Page-Field DescriptionsCaching Page 08h 67Caching Page Field Descriptions WCE FSW Control Mode Page 0Ah68Control Mode Page Data Format Page 0Ah Gltsd Rlec Eeca RAC SWP Raerp Uaaer Eaerp Eeca 69Control Mode Page-Field DescriptionsGltsd Maxtor Atlas 10K LPN Notch and Partition Page 0Ch70Notch and Partition Page-Page 0Ch 71Notch and Partition Page-Field Descriptions Port Control Mode Page 19h 72Port Control Page Short Format 73Port Control Page Long Format 74Margin Control Subpage 01h 75 Field Descriptions Maxtor Atlas 10K 76Saved Training Configuration Subpage 02h Code Transceiver Period Factor 77Negotiated Settings Subpage 03h78 Transceiver Period Factor Sent Received 79Transceiver Mode Code Transceiver Mode Bit Name Description 80Report Transfer Capabilities Subpage81 Field Descriptions Ewasc Information Exceptions Control Page 1Ch82Information Exceptions Control Page-Page 1Ch Mrie MSB Perf 84Codes Used by the Mrie Field 86Mode Parameter Header 10-Byte-Data Format Mode Select 10 Command 55h85MODE Select 10 Command Descriptor Block-Data Format 87Mode Parameter Block Descriptor-Data Format 88Mode Parameter Block Descriptor-Field Descriptions 90MODE Sense Command-Field Descriptions Mode Sense 6 Command 1Ah89MODE Sense 6 Command Descriptor Block-Data Format 91Mode Parameter Header 6 Byte-Data Format Format Device Page 03h Read-Only Mode Pages93Read-Only Mode Pages 94Format Device Page-Page Maxtor Atlas 10K 95Format Device Page-Field Descriptions Ssec RPL Rigid Disk Geometry Page 04h96Rigid Disk Geometry Page-Page 97Rigid Disk Geometry Page-Field Descriptions Tion 99Mode Parameter Header 10 Byte-Data Format Mode Sense 10 Command 5Ah98MODE Sense 10 Command Descriptor Block-Data Format 100Mode Parameter Block Descriptor-Data Format Bit 7 This bit is set if the drive is write protected Persistent Reservation in Command 5Eh 103PERSISTENT Reservation in Command-Field Descriptions 104Read Keys Parameters-Data Format Described in -106 and -107 respectively 107Read Reservations Parameters-Field Descriptions Data Description Field 110Persistent Reservation Type Codes and Their Meanings Code Name Description Exclusive LU EX Persistent Reservation Already HeldRead Write Persistent Reservation OUT Command 5Fh 113PERSISTENT Reservation OUT Command-Field Descriptions Tion OUT Powering down the logical unit, if the last Tions Preempted Pre-empting initiator Clear portion of the action executes normally 115Persistent Reservation Type Codes and Their Meanings 116PERSISTENT Reservation OUT Parameter List-Data Format Registrants Extent Length Nored for all other types of service actions Eter List 118Device Server Interpretation of Service and Scope Value Parameters 120READ 6 Command-Field Descriptions Read 6 Command 08h119READ 6 Command-Data Format 122 Read 10 Command-Field Descriptions Read 10 Command 28h121READ 10 Command-Data Format Read Buffer Command 3Ch 123READ Buffer Command-Data Format 124READ Buffer Command-Field Descriptions Buffer Offset must be 126READ Capacity Command-Field Descriptions Read Capacity Command 25h125READ Capacity Command-Data Format 127READ Capacity Returned Data-Data Format Read Defect Data Command 10 37h 128READ Defect Data 10 Command-Data Format 129READ Defect Data 10 Command-Field Description 130Defect Descriptor-Block Format 132Defect List Header -Data Format 133Defect List Header-Field Descriptions 135 Read Defect Data 12 Command-Field Description Read Defect Data Command 12 B7h134READ Defect Data 12 Command-Data Format 139Defect List Header-Field Descriptions 136Defect Descriptor-Block Format138Defect List Header-Data Format 141READ Long Command Descriptor Block-Field Descriptions Read Long Command 3Eh140READ Long Command Descriptor Block-Data Format 142READ Long Command-Returned Data 144READ Skip Mask Command-Field Description Read Skip Mask Command E8h143READ Skip Mask Command-Data Format 146REASSIGN Blocks Defect List Header-Data Format Reassign Blocks Command 07h145REASSIGN Blocks Command Descriptor Block-Data Format 147REASSIGN Blocks Defect List Header -Field Description Maxtor Atlas 10K 105 Description Size In Bytes Code Receive Diagnostic Results Command 1Ch149Diagnostic Pages Supported by The Drives PCV Translate Address Page 40h Supported Diagnostics Pages Page 00h152Supported Diagnostics Pages Page-Data Format 153Translate Address Page-Data Format 154Translate Address Page-Field Descriptions 156RELEASE 6 Command -Field Descriptions Release 6 Command 17h155RELEASE 6 Command Descriptor Block-Data Format 158 Release 10 Command Field Descriptions Release 10 Command 57h157RELEASE 10 Command Descriptor Block-Data Format Report Device Identifier Command A3h 161REPORT Device Identifier Parameter List-Data Format Maxtor Atlas 10K 164REPORT Luns Command Descriptor Block-Field Description Report Luns Command A0h163REPORT Luns Command Descriptor Block-Data Format 165LUN Reporting Parameter List -Data Format 167REQUEST Sense Command Descriptor Block-Field Description Request Sense Command 03h166REQUEST Sense Command Descriptor Block-Data Format Sense Data Availability Status Reporting Sense Data Format for Error Code 70h and Error Code 71h168Sense Data Format for Error Code 70h or 71h-Data Format EOM ILI 169Sense Data Fields Error Code 70h-Field Descriptions FRU 170Supported Sense Keys Sense Key Code Description 171Sense Key Information Field Contents Sense Meaning Key Code EC REC SVO Missed STM Sense Meaning Key Code Maxtor Atlas 10K 121 Sense Meaning Key Code Maxtor Atlas 10K 123 Sense Meaning Key Code Maxtor Atlas 10K 125 Sense Meaning Key Code Qualifier Maxtor Atlas 10K 127 Init Maxtor Atlas 10K 129 Sense Meaning Key Code Maxtor Atlas 10K 131 173 Sense-Key Specific Field Contents 174ILLEGAL Request Sense Key Field Pointer Bytes\Data Format 179MEDIUM Error or Recovered Error Sense Key Retry Count BPV Field Descriptions 181 Reserve 6 Command-Field Descriptions Reserve 6 Command 16h180RESERVE 6 Command Descriptor Block-Data Format 183 Reserve 10 Command-Field Descriptions Reserve 10 Command 56h182RESERVE 10 Command Descriptor Block-Data Format 187RESERVE 10 ID Only Parameter List-Data Format 184Extent Descriptors-Data Format185Reservation Types Reservation Type Description Rezero Unit Command 01h 188REZERO Unit Command Descriptor Block-Data Format Seek 6 Command 0Bh 189SEEK 6 Command Descriptor Block-Data Format Seek 10 Command 2Bh 190SEEK 10 Command Descriptor Block-Data Format 192 Send Diagnostic Command-Field Descriptions Send Diagnostic Command 1Dh191SEND Diagnostic Command Descriptor Block-Data Format Translate Address Supported Diagnostic Page List193Supported Diagnostic Page List-Data Format 194Translate Address Page-Data Format 198SET Device Identifier Parameter List-Field Descriptions SET Device Identifier Command A4h197SET Device Identifier Parameter List-Data Format 200START Stop Unit Command-Field Descriptions Start Stop Unit Command 1Bh199START Stop Unit Command Descriptor Block-Data Format 202SYNCHRONIZE Cache Command-Field Descriptions Synchronize Cache Command 35h201SYNCHRONIZE Cache Command Descriptor Block-Data Format Test Unit Ready Command 00h 203TEST Unit Ready Command Descriptor Block-Data Format 205 Verify Command-Field Descriptions Verify Command 2Fh204VERIFY Command Descriptor Block-Data Format 207 Write 6 Command-Field Descriptions Write 6 Command 0Ah206WRITE 6 Command Descriptor Block-Data Format 209 Write 10 Command-Field Descriptions Write 10 Command 2Ah208WRITE 10 Command Descriptor Block-Data Format 211WRITE and Verify Command-Field Descriptions Write and Verify Command 2Eh210WRITE and Verify Command Descriptor Block-Data Format Write Buffer Command 3Bh 212WRITE Buffer Command Descriptor Block-Data Format 213WRITE Buffer Command-Field Descriptions 214WRITE Long Command Descriptor Block-Data Format Write Long Command 3FhWrite Same Command 215WRITE Long Command-Field Descriptions 217WRITE Same Field Description 216WRITE Same Command Descriptor Block-Data Format218WRITE Skip Mask Command EAh 219WRITE Skip Mask Command Field Description Maxtor Atlas 10K Feature Descriptions WRITE-BACK Caching DISCONNECT-RECONNECT Average Access TimeZero Latency READ/WRITE Track and Cylinder Skewing Addressing Error Protection Media Error ProtectionTransfer Error Protection Data Sector Reallocation Error Protection Data Verification Tagged Command QueuingCommand Reordering Banded Recording Periodic Self-Adjustments DiagnosticsPower On Self Test Post Error Recovery Maxtor Atlas 10K Diffsens Switching Diffsens DT and ST Clocking 1ST and DT CLocking Adaptive Active Filter AAF Cyclic Redundancy CheckingDomain Validation Skew Compensation Transmitter Pre-Compensation with CutbackFree Running Clock FRC Information Unit Transfers System Considerations Applicable Scsi Physical Documents Quick Reference Table A-1SCSI-2/SCSI-3 Equivalent Terminology Scsi Commands and Messages Table A-2SCSI-3 Quick Reference Commands Table A-3SCSI-3 Quick Reference Messages Table A-4SCSI-3 Quick Reference Pages Maxtor Atlas 10K Table A-5SCSI-3 Quick Reference Sense Keys Table A-6SCSI-3 Quick Reference Status Codes Table B-1Transfer Period Factor Field Values When Parl = Appendix B Negotiated Rate Information page Reference Table B-2Transfer Period Factor Field Values When Parl = Settings for the QAS, DT, and IU fields Command Glossary Glossary Maxtor Atlas 10K V G-3 4Maxtor Atlas 10K Maxtor Atlas 10K V G-5 LOW-VOLTAGE Differential LVD Maxtor Atlas 10K V G-7 8Maxtor Atlas 10K Maxtor Atlas 10K V G-9 10Maxtor Atlas 10K True Refers to the logical-one or 12Maxtor Atlas 10K Index 17,5-21 Parameter List 5-11,5-12,5-17,5-18, 5- 37, 5-39,5-130,5-141 107, 5-108,5-132 141