Seagate DB35.4 manual Physical characteristics, Seek time, Start/stop times

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2.5Physical characteristics

Maximum height

20.20 mm (0.794 inches)

 

 

Maximum width

101.6 mm (4.000 inches)

 

 

Maximum length

146.99 mm (5.787 inches)

 

 

Typical weight

382 grams (0.842 lb.)

 

 

Cache buffer

8 Mbytes (8,192 kbytes)

 

 

2.6Seek time

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications in the table below are defined as follows:

•Track-to-track seek time is an average of all possible single-track seeks in both directions.

•Average seek time is a true statistical random average of at least 5,000 measurements of seeks between random tracks, less overhead.

Typical seek times (msec)

Read

Write

 

 

 

Track-to-track

<1.0

<1.2

 

 

 

Average

<14.0

<15.0

 

 

 

*Measured in performance mode. **Measured in quiet mode.

Note. These drives are designed to consistently meet the seek times represented in this manual. Physical seeks, regardless of mode (such as track-to-track and average), are expected to meet the noted values. However, due to the manner in which these drives are formatted, benchmark tests that include command overhead or measure logical seeks may produce results that vary from these specifications.

2.7Start/stop times

Power-on to Ready (sec)

16 (max)

 

 

Standby to Ready (sec)

16 (max)

 

 

Ready to spindle stop (sec)

10 (max)

 

 

DB35.4 Series SATA Product Manual, Rev. C

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Contents ST3250310CS DB35.4 Series SataRevision Date Revision historyContents DB35.4 Series Sata Product Manual, Rev. C List of Figures Page Introduction About the Serial ATA interface Specification summary tables Drive specificationsDrive specification ST3250310CS Drive specifications summary for 250 Gbyte modelDB35.4 Series Sata Product Manual, Rev. C LBA mode Default logical geometryFormatted capacity Recording and interface technologySeek time Physical characteristicsStart/stop times Typical seek times msec Read WritePower specifications Conducted noise Typical current profilesVoltage tolerance Active mode Power-management modesIdle mode Sleep modeEnvironmental specifications Operating vibration VibrationNonoperating vibration Acoustics emissions Drive A-weighted Sound Power Levels SWL, BAElectromagnetic immunity Test for Prominent Discrete Tones PDTsReliability Safety certificationAgency certification Annualized Failure Rate AFRAustralian C-Tick N176 Korean RRLFCC verification Corrosive environment Environmental protectionChina Restriction of Hazardous Substances RoHS Directive Handling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveDrive mounting Mounting dimensionsDB35.4 Series Sata Product Manual, Rev. C Hot-Plug compatibility Serial ATA Sata interfaceSerial ATA connector pin definitions Serial ATA device plug connector pin definitionsSignal Pin Function DefinitionSupported ATA commands Supported ATA commandsCommand name Command code in hex F4H Word Description Value Identify Device commandXx07H 129 Seagate-reserved Bit Word Description if bit is set to Bit WordSet Features command values Set Features commandA.R.T. commands 3 S.M.A.R.T. commandsCode in features register A.R.T. command Internet Seagate Technology support servicesPresales Support Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Index ITE Page DB35.4 Series Sata Product Manual, Rev. C Page Seagate Technology LLC

DB35.4 specifications

The Seagate DB35.4 series of hard disk drives (HDDs) represents a significant advancement in data storage solutions for digital video recording and other demanding applications. Designed specifically for use in DVRs, NVRs, and related multimedia production environments, the DB35.4 drives are tailored to meet the rigorous requirements of streaming and recording high-definition video content.

One of the standout features of the DB35.4 series is its optimized design for continuous operation. These drives are built to handle workloads that involve constant read and write cycles, making them ideal for multi-channel recording setups. With a Mean Time Between Failures (MTBF) rating of 1.2 million hours, the drives ensure reliability and durability, essential for critical applications in broadcasting and surveillance.

The DB35.4 series supports advanced technologies, including native command queuing (NCQ), which enhances performance by allowing multiple read and write commands to be processed simultaneously. This results in improved data transfer rates and reduced latency, which are vital for applications requiring swift access to stored content. With capacities ranging from 250 GB to 2 TB, the drives provide ample space for storing extensive video libraries.

In terms of performance, the DB35.4 features a rotational speed of 7200 RPM, combined with a SATA interface that enables high-speed data transfers. The drives usually come equipped with 8 MB or higher cache memory, further boosting their efficiency during heavy data loads. This ensures that users experience smooth playback and recording, minimizing the risk of dropped frames or buffering.

Energy efficiency is another key characteristic of the Seagate DB35.4 series. Designed with power management in mind, these drives consume less energy during operation while still delivering optimal performance. This not only reduces operational costs but also contributes to a more environmentally friendly solution for users looking to maximize their storage capabilities without excessive power consumption.

In summary, the Seagate DB35.4 HDDs stand out for their reliability, performance, and efficiency. With their specialized design for multimedia applications, advanced technologies like NCQ, and a focus on energy savings, the DB35.4 series remains a preferred choice for businesses and individuals aiming to optimize their digital storage solutions in a demanding video-centric world.
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