Samsung M8 Disk Stack Assembly, Head Stack Assembly, Air Filtration System, Load/Unload Mechanism

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5.1.3Disk Stack Assembly

The disk stack assembly in the Spinpoint M8 hard disk drive consists of 1 or 2 disks and disk spacers secured on the hub of the spindle motor assembly by a disk clamp. The glass disks have a sputtered thin-film magnetic coating.

5.1.4Head Stack Assembly

The head stack assembly consists of an E-block/coil sub-assembly, read/write heads, a flexible circuit, and bearings. The E-block/coil sub-assembly is assembled with an E-block and over-molded coil. Read/write heads are mounted to spring-stainless steel flexures that are then swage mounted onto the E-block arms.

The flexible circuit connects the read/write heads with the PCBA via a connector through the base casting. The flexible circuit contains a read/write Preamplifier IC.

5.1.5Voice Coil Motor and Actuator Latch Assemblies

The rotary voice coil motor consists of upper and lower permanent magnets and magnetic yokes fixed to the base casting and a rotary over-molded coil on the head stack assembly. Each magnet consists of two alternating poles and is attached to the magnet yoke. Pawl latch and rubber crash stops mounted on a magnetic yoke physically prevent the head(s) from moving beyond the designed inner boundary into the spindle or off the disk surface. Current from the power amplifier induces a magnetic field in the voice coil. Fluctuations in the field around the permanent magnets move the voice coil so that heads can be positioned in the requested cylinder.

5.1.6Air Filtration System

Heads fly very close to the disk surfaces. Therefore, it is very important that air circulating within the drive be maintained free of particles. Samsung HDAs are assembled in a purified air environment to ensure cleanliness and then sealed with a gasket. To retain this clean air environment, the Spinpoint M8 hard disk drive is equipped with a re-circulating filter, which is located in the path of the airflow close to the rotating disk and is designed to trap any particles that may develop inside HDA.

5.1.7Load/Unload Mechanism

Portable computer is exposed to heavy handling environment comparing with desk top computer. Load/Unload mechanism provides to protect data loss caused by head hitting to disk due to the abnormal shock and vibration in the transportation and handling. When power is shut down, head will move to parking position on the ramp.

Spinpoint M8 Product Manual REV 2.3

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Contents M8 Product Manual Page Table of Contents Servo System Read and Write Operations Read Fpdma Queued 60h Read Log Extended 2Fh Read Long 22h Table of Tables User Definition ScopeManual Organization Reference SataIntroduction DescriptionKey Features Hardware Requirements Standards and RegulationsSpindle speed RPM RPM Class SpecificationsSpecification Summary SpecificationsPhysical dimensions Physical SpecificationsLogical Configurations Physical SpecificationsPerformance Specifications Rated Power consumptionPower consumption Power RequirementsEnvironmental Specifications Environmental Specifications15.0 Reliability Specifications Space Requirements InstallationMounting Unpacking InstructionsOrientation Mounting DimensionsMounting-Screw Clearance ClearanceVentilation Cable ConnectorsSata Connectivity Serial ATA Management PowerHDD Power, Sata Interface, and Factory Jumper Connector Pin Locations on the Drive Pcba DC Power Connector and SATA-Bus Interface Cable Connections Drive InstallationDisk Drive Operation Head / Disk Assembly HDABase Casting Assembly DC Spindle Motor AssemblyCoverAssembly Air Filtration System Disk Stack AssemblyHead Stack Assembly Voice Coil Motor and Actuator Latch AssembliesDrive Electronics Digital Signal Process and Interface ControllerDisk Controller DDR Buffer Control Block Host Interface Control BlockDisk Ldpc Control Block Disk Control BlockFrequency Synthesizer Automatic Gain Control Power ManagementRead/Write IC Time Base GeneratorAnalog to Digital Converter ADC and FIR Analog Anti-Aliasing Low Pass FilterRead and Write Operations Servo SystemRead Channel Write Channel Firmware FeaturesRead Caching Write Caching Smart Defect ManagementAutomatic Defect Allocation Multi-burst ECC CorrectionSata Terminology Sata II InterfaceSpinpoint M8 Product Manual REV Signal Descriptions Physical Interface Signal SummaryRegisters When read When written2 I/O Register Address Control Block Register DescriptionsDevice Control Register ex F6h Command Block Register DescriptionsFeatures Register and Feature Extended Register Ex F1h Error Register Ex F1hDevice Register Ex F6h Command Register Ex F7hStatus Register Ex F7h Auto-Activate in DMA Setup FIS Sata II Feature SETDevice Activity Signal Staggered Spin-up Disable ControlPhy. Event Counters Sata Power Management Software Settings PreservationCommand Table ATA Command DescriptionsCommand Code Parameters Check Power Mode E5h Command DescriptionsDownload Micro Code 92h Device Configuration Overlay B1hDevice Configuration Overlay Feature Register Values CommandDevice Configuration Identify data structure Word Content Format Track 50h Execute Device Diagnostics 90hDiagnostic Codes Flush Cache E7h, EAh extendedIdentify Device information Content Description=the fields reported in word 88 are valid EXT =Media Card Pass Through command feature set supported WWN Word Content DescriptionIdle E3h Automatic Standby Timer PeriodsIdle Immediate E1h Read DMA C8h, 25h extended Initialize Device Parameters 91hNOP 00h Read Buffer E4hRead Log Extended 2Fh Read Multiple Command C4h, 29h extendedRead Long 22h Read Sectors 20h, 24h extended Read Native Max Address F8h, 27h extendedRead Verify Sectors 40h, 41h extended Security Erase Unit F4h Security Disable Password F6hRecalibrate 10h Security Erase Prepare F3hSecurity Freeze Lock F5h Security Set Password F1hSecurity Erase Unit Password Word Content Security Set Password data contentSeek 7xh Set Features EFhIdentifier Level Command result Security Unlock F2h12 Transfer Mode Values 11 Set Features Register DefinitionsSleep E6h Set Multiple Mode C6h13 Set Max Feature Register Values Set Max Address F9h, 37h extendedSmart B0h 14 Smart Feature Registers ValuesSmart disable operations D9h Smart enable/disable attribute auto-save D2hSmart execute off-line immediate D4h Smart enable operations D8h15 Device Smart Data Structure Smart read data D0hData Structure Revision Number 16 Smart Attribute Status Flags Bit Name Description18 Off-line Data Collection Status Values 17 Smart Attribute Data List19 Self-test Execution Status Values Self-test execution status byteSmart return status DAh Smart read log sector D5hSmart write log sector D6h Write Fpdma Queued 61h Standby Immediate E0hWrite Buffer E8h Write DMA CAh, 35h extendedWrite Long 32h Write Multiple Command C5h, 39h extendedWrite Sectors 30h, 34h extended Spinpoint M8 Product Manual REV Maintenance Precautions MaintenanceGeneral Information HDD handling guide -Please handle HDD by side surfaces HDD handling guide Prevent Shocks Service and Repair
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