Samsung M9T Initialize Device Parameters 91h, NOP 00h, Read Buffer E4h, Read Fpdma Queued 60h

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8.2.10 Initialize Device Parameters (91h)

This command is obsolete in the ATA7 specification. The supporting of this command is for backward compatibility purpose. The use of this command is beyond the ATA standard and not recommended by the manufacture.

This command enables the host to set the number of sectors per track and the number of heads minus 1, per cylinder. Upon receipt of the command, the drive sets BSY, saves the parameters, clears BSY, and generates an interrupt.

The only two register values used by this command are the Sector Count register which specifies the number of sectors per track, and the Drive/Head register which specifies the number of heads minus 1. The sector count and head values are not checked for validity by this command. If they are invalid, no error will be posted until an illegal access is made by some other command.

8.2.11 NOP (00h)

The NOP command is always responded with command aborted.

8.2.12 Read Buffer (E4h)

The Read Buffer command enables the host to read the current contents of the drive's sector buffer. When this command is issued, the drive sets up the sector buffer for a read operation, sets DRQ, clears BSY, and generates an interrupt. The host then reads up to 512 bytes of data from the buffer.

The Read Buffer and Write Buffer commands are synchronized so that sequential Write Buffer (E8h) and Read Buffer commands access the same 512 bytes within the buffer.

8.2.13 Read DMA (C8h, 25h: extended)

This command executes in a manner similar to the Read Sector(s) command except for the drive issues only one interrupt per command to indicate that data transfer has stopped and the status is available.

Any unrecoverable error encountered during execution of a Read DMA command results in the termination of data transfer prior to the sector where the error was detected. The drive generates an interrupt to indicate that data transfer has terminated and status is available. The error posting is the same as that for the Read Sector(s) command.

8.2.14 Read FPDMA Queued (60h)

This command is implemented according to the Serial ATA II: Extension to Serial ATA 1.0a, Revision 1.2 specification. The purpose of this command is for the host to issue a Native Command Queue (NCQ) read commands. This command allows device to reorder the command issued in a sequence of the queue. The command is returned based on the device’s determine of the location sequence.

The Spinpoint M9T drive implemented a queue depth of 32. This will allow host to issue up to 32 NCQ commands (combined read and write commands).

Spinpoint M9T Product Manual REV 1.0

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Contents M9T Product Manual Page Table of Contents Iii Read Fpdma Queued 60h Read Log Extended 2Fh Read Long 22h Table of Tables Scope User DefinitionManual Organization Sata ReferenceDescription IntroductionKey Features Standards and Regulations Hardware RequirementsSpecifications Specification SummaryPhysical Specifications Logical ConfigurationsPerformance Specifications Power consumption Power consumptionPower Requirements RatedEnvironmental Specifications Environmental SpecificationsLinear Shock 1/2 sine pulse Rotational ShockReliability Specifications Installation Space RequirementsUnpacking Instructions MountingMounting Dimensions OrientationCable Connectors VentilationSata Connectivity Computer mainboard or Serial ATA host adapter Power ManagementSATA-Bus Interface Connector HDD Power, Sata Interface, and Factory Jumper ConnectorDrive Installation DC Power Connector and SATA-Bus Interface Cable ConnectionsHead / Disk Assembly HDA Base Casting AssemblyDC Spindle Motor Assembly Disk Drive OperationExploded Mechanical View Disk Stack Assembly Head Stack AssemblyVoice Coil Motor and Actuator Latch Assemblies Air Filtration SystemDigital Signal Process and Interface Controller Drive ElectronicsDisk Controller DDR Host Interface Control Block Buffer Control BlockDisk Control Block Disk Ldpc Control BlockFrequency Synthesizer Power Management Read/Write ICTime Base Generator Automatic Gain ControlAnalog Anti-Aliasing Low Pass Filter Analog to Digital Converter ADC and FIRServo System Read and Write OperationsRead Channel Firmware Features Write ChannelRead Caching Write Caching Defect Management Automatic Defect AllocationSmart 6 APMSata II Interface Sata TerminologySpinpoint M9T Product Manual REV Physical Interface Signal Summary Signal DescriptionsWhen read When written 2 I/O Register AddressControl Block Register Descriptions RegistersCommand Block Register Descriptions Command Register Ex F7h Device Register Ex F6hStatus Register Ex F7h Sata II Feature SET Device Activity SignalStaggered Spin-up Disable Control Auto-Activate in DMA Setup FISPhy Event Counters Software Settings Preservation Sata Power ManagementATA Command Descriptions Command TableCommand Code Parameters Smart Command Descriptions Check Power Mode E5hDevice Configuration Overlay B1h Download Micro Code 92hDevice Configuration Identify data structure Word Content Execute Device Diagnostics 90h Diagnostic CodesFlush Cache E7h, EAh extended Format Track 50hContent Description Identify Device information=the fields reported in word 88 are valid EXT =Media Card Pass Through command feature set supported Word Content Description WWNAutomatic Standby Timer Periods Idle E3hIdle Immediate E1h Initialize Device Parameters 91h NOP 00hRead Buffer E4h Read DMA C8h, 25h extendedRead Multiple Command C4h, 29h extended Read Log Extended 2FhRead Long 22h Read Native Max Address F8h, 27h extended Read Sectors 20h, 24h extendedRead Verify Sectors 40h, 41h extended Security Disable Password F6h Recalibrate 10hSecurity Erase Prepare F3h Security Erase Unit F4hSecurity Set Password F1h Security Erase Unit Password Word ContentSecurity Set Password data content Security Freeze Lock F5hSet Features EFh Security Unlock F2hSeek 7xh 11 Set Features Register Definitions 12 Transfer Mode ValuesSet Multiple Mode C6h 13 Set Max Feature Register ValuesSet Max Address F9h, 37h extended Sleep E6h14 Smart Feature Registers Values Smart disable operations D9hSmart enable/disable attribute auto-save D2h Smart B0hSmart enable operations D8h Smart execute off-line immediate D4hSmart read data D0h 15 Device Smart Data StructureByte Bit Name Description 16 Smart Attribute Status Flags17 Smart Attribute Data List 18 Off-line Data Collection Status ValuesSelf-test execution status byte 19 Self-test Execution Status ValuesSmart read log sector D5h Smart return status DAhSmart write log sector D6h Standby Immediate E0h Write Buffer E8hWrite DMA CAh, 35h extended Write Fpdma Queued 61hWrite Multiple Command C5h, 39h extended Write Sectors 30h, 34h extendedSpinpoint M9T Product Manual REV Maintenance Maintenance PrecautionsGeneral Information HDD handling guide -Please handle HDD by side surfaces Service and Repair HDD handling guide Prevent Shocks
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