Head / Disk Assembly HDA | Samsung 3.5 hard disk drives instruction

DISK DRIVE OPERATION

CHAPTER 5 DISK DRIVE OPERATION

This chapter describes the operation of the SpinPoint V40 functional subsystems. It is intended as a guide to the operation of the drive, rather than a detailed theory of operation.

5.1Head / Disk Assembly (HDA)

A SpinPoint V40 hard disk drive consists of a mechanical sub-assembly and a printed circuit board assembly (PCBA), as shown in Figure 5-1. This section describes the mechanism of the drive.

The head / disk assembly (HDA) contains the mechanical sub-assemblies of the drive, which are sealed between the aluminum-alloy base and cover. The HDA consists of the base casting assembly (which includes the DC spindle motor assembly), the disk stack assembly, the head stack assembly, and the rotary voice coil motor assembly (which includes the actuator latch assembly). The HDA is assembled in a clean room. These subassemblies cannot be adjusted or field repaired.

CAUTION: To avoid contamination in the HDA, never remove or adjust its cover and seals. Disassembling the HDA voids your warranty.

SpinPoint V40 disk drive models and capacities are distinguished by the number of heads and disks. The SV4002H has one (1) disk and two (2) read/write heads. The SV8004H has two (2) disks and four (4) read/write heads.

5.1.1Base Casting Assembly

A one piece, aluminum-alloy base casting provides a mounting surface for the drive mechanism and PCBA. The base casting also serves as the flange for the DC spindle motor assembly. A gasket provides a seal between the base and cover castings that enclose the drive mechanism.

5.1.2DC Spindle Motor Assembly

The DC spindle motor assembly consists of the brush-less three-phase motor, spindle bearing assembly, disk mounting hub, and a labyrinth seal. The entire spindle motor assembly is completely enclosed in the HDA and screwed to the base casting. The labyrinth seal prevents bearing lubricant from coming out into the HDA. The motor rotates the spindle shaft at 5400 rpm.

SpinPoint V40 Product Manual

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Samsung 3.5 hard disk drives, spinpoint v40 Head / Disk Assembly HDA, Base Casting Assembly, DC Spindle Motor Assembly

Contents

Spinpoint SpinPoint V40 Product Manual Table of Contents Irmware F Eatures Ervo S Ystem EAD and W Rite O PerationsSmart Protocol Overview Programming RequirementsTiming General Information Maintenance PrecautionsService and Repair 107 Table of Figures Page Manual Organization User DefinitionScope Format C/S Commands and MessagesTerminology and Conventions Computer Message Reference Introduction Key FeaturesDescription Hardware Requirements Standards and Regulations Specifications Specification Summary Logical Configurations Physical Specifications Performance Specifications 28.71 Power Requirements SV6003H SV6014H SV8004H Environmental Specifications Mtbf POH Reliability Specifications Space Requirements Installation Mounting Unpacking InstructionsOrientation 2Mounting Dimensions in Millimeters 3Mounting-Screw Clearance Clearance Ventilation Cable ConnectorsDC Power Connector AT-Bus Interface Connector SpinPoint V40 Product Manual Jumper Block Configurations Options for Jumper Block Configuration 7DC Power Connector and AT-Bus Interface Cable Connections Drive Installation Parameter System Startup Procedure System Setup Disk Drive Operation Head / Disk Assembly HDABase Casting Assembly DC Spindle Motor Assembly Exploded Mechanical View Air Filtration System Disk Stack AssemblyHead Stack Assembly Voice Coil Motor and Actuator Latch Assemblies Drive Electronics Digital Signal Process and Interface ControllerAT Disk Controller 2SID2001 AT Controller Block Diagram Host Interface Control Block Disk Control Block Buffer Control Block SpinPoint V40 Product Manual Frequency Synthesizer Power ManagementRead/Write IC Disk ECC Control Block Analog Anti-Aliasing Low Pass Filter Time Base GeneratorAutomatic Gain Control Asymmetry Correction Circuitry ASC 3Read/Write 88C5200 Read and Write Operations Servo SystemRead Channel Write Channel Firmware FeaturesRead Caching Write Caching Smart Defect ManagementAutomatic Defect Allocation Multi-burst ECC Correction Blank Signal Summary Signal ConventionsPhysical Interface Signal Descriptions IOCS16- Drive 16-bit I/O DMACK- DMA AcknowledgeDmarq DMA Request Intrq Drive Interrupt RESET- Drive Reset PDIAG- Passed DiagnosticsIordy I/O Channel Ready SD2 SD8 SD6 SD9 SD5SD4 SD3 Drive Host Drive DIR Environment Logical InterfaceGeneral Bit Conventions SpinPoint V40 Product Manual N N N A a a Command Block Registers2 I/O Register Address Control Block Registers Device Control Register 3F6h Control Block Register DescriptionsAlternate Status Register 3F6h Drive Address Register 3F7h Data Register 1F0h Command Block Register DescriptionsFeatures Register 1F1h Error Register 1F1h Cylinder Low Register 1F4h Command Register 1F7hSector Count Register 1F2h Cylinder High Register 1F5h BSY Drdy DWF DSC DRQ Corr IDX ERR Status Register 1F7h At Command Register Descriptions Command Parameter Used SpinPoint V40 Product Manual Execute Device Diagnostics 90h Check Power Mode 98h, E5hDownload Micro Code 92h Format Track 50h Flush Cache E7hIdentify Device ECh Xxxx Word Content Description Capabilities Command set supported 95-128 0000h Reserved 129-159 Vendor specific 160-255 Idle Immediate 95h,E1h Idle 97h,E3hInitialize Device Parameters 91h Read Long 22hwith retry, 23h without retry Read Buffer E4h Read Multiple Command C4h Read Sectors 20hwith retry, 21hwithout retry Read Native Max Address F8h Recalibrate 1xh Read Verify Sectors 40hwith retry, 41hwithout retrySeek 7xh Mode Set Features EFh BSY Drdy DRQ ERR InputsLBA Normal outputs Description Sleep 99h, E6h Set Multiple Mode C6h Standby 96h,E2h Smart disable operation D9hSmart B0h Smart enable operations D8h Smart enable/disable attribute autosave D2hSmart execute off-line immediate D4h Byte Descriptions Smart read data D0h Off-line data collection capability Value Definition Smart save attribution value D3h Smart capabilitySmart read log sector D5h Smart return status DAh Write DMA CAh Standby 96h, E2hStandby Immediate 94h, E0h Write Buffer E8h Write Sectors 30hwith retry, 31hwithout retry Write Multiple Command C5h SpinPoint V40 Product Manual Error Posting Reset ResponseProgramming Requirements BBK Command Error Register Status Register Idle mode Power ConditionsSleep mode Standby mode Normal mode Protocol Overview PIO Data in Commands PIO Read Command PIO Data Out CommandsPIO Read Aborted Command BSY=0 DRQ=1 BSY=1 DRQ=0 PIO Write CommandPIO Write Aborted Command BSY=0 DRDY=1 BSY=1 Non-Data Commands DMA Data Transfer Commands BSY=0 BSY=1 Aborted DMA Command Initialize DMA Reset DMA StatusBSY=1 BSY=0 Register transfers Timing DIOR-/DIOW Write PIO data transfers PIO timing parameters Mode Addr valid See note T1 t2 DIOR-/DIOW DIOR-/DIOW Multiword DMA data transfer Multiword DMA timing parameters Mode Initiating an Ultra DMA data in burst Ultra DMA data transfer 19Ultra DMA data burst timing requirements Ultra DMA data burst timing requirements 5Sustained Ultra DMA data in burst Sustained Ultra DMA data in burst 6Host pausing an Ultra DMA data in burst Host pausing an Ultra DMA data in burst 7Device terminating an Ultra DMA data in burst 100 Device terminating an Ultra DMA data in burst 8Host terminating an Ultra DMA data in burst Host terminating an Ultra DMA data in burst 9Initiating an Ultra DMA data out burst 102 Initiating an Ultra DMA data out burst 10Sustained Ultra DMA data out burst Sustained Ultra DMA data out burst 11Device pausing an Ultra DMA data out burst 104 Device pausing an Ultra DMA data out burst 12Host terminating an Ultra DMA data out burst Host terminating an Ultra DMA data out burst 13Device terminating an Ultra DMA data out burst 106 Device terminating an Ultra DMA data out burst Service And Repair Maintenance PrecautionsGeneral Information