Samsung M8 Defect Management, Automatic Defect Allocation, Multi-burst ECC Correction, Smart

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If the sector is not automatically relocated, the drive drops out of write caching and reports the error as an ID Not Found. If the write command is still active on the AT interface, the error is reported during that command. Otherwise, it is reported on the next command.

5.5.3Defect Management

The Spinpoint M8 hard disk drive media is scanned for defects. After defect scanning, the defective sectors are saved in the defect list. A defect encountered in the manufacturing process is slipped to the next physical sector location. All logical sector numbers are pushed down to maintain a sequential order of data. The read/write operation can “slip” over the defective sectors so that the only performance impact is idle time.

5.5.4Automatic Defect Allocation

The automatic defect allocation feature automatically maps out defective sectors encountered during read sector or write sector operations. These types of defective sectors are typically caused by grown defects. During write operations, if write errors are encountered, all sectors within the target servo frame are mapped out. Original data is transferred and written into designated reserved sector areas determined by the HDD firmware.

5.5.5Multi-burst ECC Correction

The drive uses a Reed-Solomon code to perform error detection and correction. For each 512 byte block, the software error correction polynomial is capable of correcting:

One 191-bit burst error

Up to 48 bytes with reassure pointer (off-line correction)

These errors are corrected on the fly with no performance degradation.

5.5.6SMART

The intent of Self-monitoring, Analysis and Reporting Technology (SMART) is to protect user data and to minimize the likelihood of unscheduled system downtime that may be caused by unpredictable degradation and/or device fault. By monitoring and storing critical performance and calibration parameters, SMART devices attempt to predict the likelihood of near-term degradation or fault condition. Providing the host system knowledge of a negative reliability condition allows the host system to warn the user of the impending risk of a data loss and advise the user of appropriate action.

5.5.7APM

The Automatic Power Management (APM) feature set is an optional feature set that allows the host to select a power management level. The power management level is specified using a scale from the lowest power consumption setting to the maximum performance level. Device performance may increase with increasing power management levels. Device power consumption may increase with increasing power management levels. This feature is enabled by the Set Features command.

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 Manual Organization ScopeUser Definition Reference SataIntroduction DescriptionKey Features Hardware Requirements Standards and RegulationsSpecification Summary SpecificationsSpecifications Spindle speed RPM RPM ClassLogical Configurations Physical SpecificationsPhysical Specifications Physical dimensionsPerformance Specifications Power consumption Power consumptionPower Requirements RatedEnvironmental Specifications Environmental Specifications15.0 Reliability Specifications Space Requirements InstallationMounting Unpacking InstructionsOrientation Mounting DimensionsMounting-Screw Clearance ClearanceSata Connectivity Cable ConnectorsVentilation 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 InstallationBase Casting Assembly Head / Disk Assembly HDADC Spindle Motor Assembly Disk Drive OperationCoverAssembly Head Stack Assembly Disk Stack AssemblyVoice Coil Motor and Actuator Latch Assemblies Air Filtration SystemDisk Controller Digital Signal Process and Interface ControllerDrive Electronics DDR Buffer Control Block Host Interface Control BlockFrequency Synthesizer Disk Control BlockDisk Ldpc Control Block Read/Write IC Power ManagementTime Base Generator Automatic Gain ControlAnalog to Digital Converter ADC and FIR Analog Anti-Aliasing Low Pass Filter Read Channel Servo System Read and Write Operations Read Caching Firmware FeaturesWrite Channel Write Caching Automatic Defect Allocation Defect ManagementMulti-burst ECC Correction SmartSata Terminology Sata II InterfaceSpinpoint M8 Product Manual REV Signal Descriptions Physical Interface Signal Summary2 I/O Register Address When read When writtenControl Block Register Descriptions RegistersFeatures Register and Feature Extended Register Ex F1h Command Block Register DescriptionsError Register Ex F1h Device Control Register ex F6hDevice Register Ex F6h Command Register Ex F7hStatus Register Ex F7h Device Activity Signal Sata II Feature SETStaggered Spin-up Disable Control Auto-Activate in DMA Setup FISPhy. Event Counters Sata Power Management Software Settings PreservationCommand Code Parameters ATA Command DescriptionsCommand Table Check Power Mode E5h Command DescriptionsDevice Configuration Overlay Feature Register Values Device Configuration Overlay B1hCommand Download Micro Code 92hDevice Configuration Identify data structure Word Content Diagnostic Codes Execute Device Diagnostics 90hFlush Cache E7h, EAh extended Format Track 50hIdentify 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 Immediate E1h Automatic Standby Timer PeriodsIdle E3h NOP 00h Initialize Device Parameters 91hRead Buffer E4h Read DMA C8h, 25h extendedRead Long 22h Read Multiple Command C4h, 29h extendedRead Log Extended 2Fh Read Verify Sectors 40h, 41h extended Read Native Max Address F8h, 27h extendedRead Sectors 20h, 24h extended Recalibrate 10h Security Disable Password F6hSecurity Erase Prepare F3h Security Erase Unit F4hSecurity Erase Unit Password Word Content Security Set Password F1hSecurity Set Password data content Security Freeze Lock F5hIdentifier Level Command result Set Features EFhSecurity Unlock F2h Seek 7xh12 Transfer Mode Values 11 Set Features Register Definitions13 Set Max Feature Register Values Set Multiple Mode C6hSet Max Address F9h, 37h extended Sleep E6hSmart disable operations D9h 14 Smart Feature Registers ValuesSmart enable/disable attribute auto-save D2h Smart B0hSmart 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 write log sector D6h Smart read log sector D5hSmart return status DAh Write Buffer E8h Standby Immediate E0hWrite DMA CAh, 35h extended Write Fpdma Queued 61hWrite Sectors 30h, 34h extended Write Multiple Command C5h, 39h extendedWrite Long 32h Spinpoint M8 Product Manual REV General Information MaintenanceMaintenance Precautions HDD handling guide -Please handle HDD by side surfaces HDD handling guide Prevent Shocks Service and Repair
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