Samsung M8-DVR Read Log Extended 2Fh, Read Long 22h, Read Multiple Command C4h, 29h extended

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If the drive enters NCQ mode and a non-queue command is received, the drive will respond with error to inform host a queue command been overlapped with non-queue. If a queue tag is not finished and another same tag command is received, the drive will response with error to inform host a duplicated tag is received.

Error information is reported according to the SATA II specification. A read Log Extended command with log page 10 is required to retrieve the error information.

8.2.15 Read Log Extended (2Fh)

This command returns the specified log to the host. The device shall interrupt for each DRQ block transferred. See ATA 7 document for command details.

8.2.16 Read Long (22h)

This command is obsolete in the ATA7 specification.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.

The Read Long command performs similarly to the Read Sectors command except that it returns the data and the ECC bytes appended to the data field of the desired sector. During a Read Long command, the drive does not check the ECC bytes to determine if there has been a data error. Only single sector Read Long operations are supported.

The transfer of the ECC bytes shall be 8 bits wide and 4 or device native ECC bytes length.

8.2.17 Read Multiple Command (C4h, 29h: extended)

The Read Multiple command performs similarly to the Read Sectors command except interrupts are not generated on every sector, but on the transfer of a block which contains the number of sectors defined by a Set Multiple command.

Command execution is identical to the Read Sectors operation except that the numbers of sectors as defined by a Set of Multiple command are transferred without intervening interrupts. DRQ qualification of the transfer is required only at the start of the data block, not on each sector.

The block count of sectors to be transferred without intervening interrupts is programmed by the Set Multiple Mode command, which should be executed prior to the Read Multiple command. When the Read Multiple command is issued, the Sector Count register contains the number of sectors (not the number of blocks or the block count) requested.

If the number of requested sectors is not evenly divisible by the block count, as many full blocks as possible are transferred, followed by a final, partial block transfer. The partial block transfer shall be for n sectors, where

n = Remainder (Sector Count / Block Count)

If the Read Multiple command is attempted before the Set Multiple Mode command has been executed or when Read Multiple commands are disabled, then the Read Multiple operation is rejected with an Aborted Command error.

Disk errors encountered during Read Multiple commands are posted at the beginning of the block or partial block transfer, but DRQ is still set and the data transfer takes place as it normally would, including transfer of corrupted data, if any.

Spinpoint M8-DVR Disti Product Manual REV 2.0

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Contents M8-DVR Product Manual Page Table of Contents Smart APM Read Fpdma Queued 60h Read Log Extended 2Fh Read Long 22h Table of Tables Scope User DefinitionManual Organization Reference SataIntroduction DescriptionKey Features Hardware Requirements Standards and RegulationsSpecification Summary SpecificationsPhysical dimensions Physical SpecificationsLogical Configurations Physical SpecificationsPerformance Specifications Rated Power consumptionPower consumption Power RequirementsRotational Shock Environmental SpecificationsEnvironmental Specifications Linear Shock 1/2 sine pulse1Measurement Position Annualized Failure Rate AFR Reliability SpecificationsSpace Requirements InstallationMounting Unpacking InstructionsOrientation Mounting DimensionsCable Connectors VentilationSata Connectivity Computer mainboard Serial ATA Management PowerHDD Power, Sata Interface, and Factory Jumper Connector SATA-Bus Interface ConnectorPin 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 AssembliesDigital Signal Process and Interface Controller Drive ElectronicsDisk Controller DDR Buffer Control Block Host Interface Control BlockDisk Control Block Disk Ldpc Control BlockFrequency Synthesizer Automatic Gain Control Power ManagementRead/Write IC Time Base GeneratorAnalog to Digital Converter ADC and FIR Analog Anti-Aliasing Low Pass FilterServo System Read and Write OperationsRead Channel Firmware Features Write ChannelRead Caching Write Caching 6 APM Defect ManagementAutomatic Defect Allocation SmartSata Terminology Sata II InterfaceSpinpoint M8-DVR Disti Product Manual REV Signal Descriptions Physical Interface Signal SummaryRegisters When read When written2 I/O Register Address Control Block Register DescriptionsCommand Block Register Descriptions Device 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 PreservationATA Command Descriptions Command TableCommand Code Parameters Smart Download Micro Code 92h Command DescriptionsCheck Power Mode E5h Device Configuration Overlay B1hDevice 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 DescriptionAutomatic Standby Timer Periods Idle E3hIdle Immediate E1h Read DMA C8h, 25h extended Initialize Device Parameters 91hNOP 00h Read Buffer E4hRead 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 Erase Unit F4h Security Disable Password F6hRecalibrate 10h Security Erase Prepare F3hSecurity Freeze Lock F5h Security Set Password F1hSecurity Erase Unit Password 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 D0hByte 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 read log sector D5h Smart return status DAhSmart write log sector D6h Write Fpdma Queued 61h Standby Immediate E0hWrite Buffer E8h Write DMA CAh, 35h extendedWrite Multiple Command C5h, 39h extended Write Long 32hWrite Sectors 30h, 34h extended Spinpoint M8-DVR Disti Product Manual REV Maintenance Maintenance PrecautionsGeneral Information HDD handling guide -Please handle HDD by side surfaces HDD handling guide Prevent Shocks Service and Repair

M8-DVR specifications

The Samsung M8-DVR is an advanced digital video recorder designed to meet the ever-evolving demands of modern surveillance and recording needs. This cutting-edge device combines state-of-the-art technology with user-friendly features, making it a reliable choice for both residential and commercial applications.

At the core of the M8-DVR’s design is its high-definition recording capability. The device supports various resolutions, including Full HD 1080p, ensuring that all captured footage is crystal clear. This clarity is crucial for identifying details, whether for security purposes or monitoring activities around the clock. It can accommodate multiple camera inputs, allowing users to expand their surveillance network seamlessly.

One of the standout features of the M8-DVR is its remarkable storage capacity. Equipped with advanced hard disk technology, it can store several terabytes of footage, which can be further expanded using additional drives. This means that even with continuous recording, users won’t have to worry about running out of storage quickly. The device also incorporates efficient compression technologies, such as H.265, which allows for reduced file sizes without sacrificing video quality.

In terms of connectivity, the M8-DVR offers various options, including Ethernet ports for network connectivity, USB ports for data transfer, and HDMI output for direct connection to monitors. This versatility allows users to easily stream live footage or review recordings on larger screens. The device supports remote viewing through mobile applications, allowing users to monitor their property from virtually anywhere in real-time.

User experience is further enhanced by an intuitive interface that makes navigation simple and efficient. It includes features like motion detection and alerts, which notify users of any unusual activities. The advanced search function is another highlight, enabling users to quickly locate specific events in their recordings without long hours of scrolling.

The Samsung M8-DVR is also designed with durability in mind. It comes with robust security features to protect against unauthorized access and offers backup options to prevent data loss. With its blend of technology, storage capabilities, and user-friendly design, the Samsung M8-DVR stands out as a comprehensive solution for modern video surveillance needs, making it an essential tool for enhancing security and peace of mind in any environment.
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