Seagate ST9120821A, ST98823A, ST96812A, ST94813A Set Features command, Features register values

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4.1.3Set Features command

This command controls the implementation of various features that the drive supports. When the drive receives this command, it sets BSY, checks the contents of the Features register, clears BSY and generates an inter- rupt. If the value in the register does not represent a feature that the drive supports, the command is aborted. Power-on default has the read look-ahead and write caching features enabled. The acceptable values for the Features register are defined as follows:

Table 8:

 

Features register values

 

 

 

02H

 

Enable write cache (default).

03H

 

Set transfer mode (based on value in Sector Count register).

 

 

Sector Count register values:

 

 

 

 

 

 

 

00H

 

Set PIO mode to default (PIO mode 2).

 

 

 

 

 

 

 

01H

 

Set PIO mode to default and disable IORDY (PIO mode 2).

 

 

 

 

 

 

 

08H

 

PIO mode 0

 

 

 

 

 

 

 

09H

 

PIO mode 1

 

 

 

 

 

 

 

0AH

 

PIO mode 2

 

 

 

 

 

 

 

0BH

 

PIO mode 3

 

 

 

 

 

 

 

0CH

 

PIO mode 4 (default)

 

 

 

 

 

 

 

20H

 

Multiword DMA mode 0

 

 

 

 

 

 

 

21H

 

Multiword DMA mode 1

 

 

 

 

 

 

 

22H

 

Multiword DMA mode 2

 

 

 

 

 

 

 

40H

 

Ultra DMA mode 0

 

 

 

 

 

 

 

41H

 

Ultra DMA mode 1

 

 

 

 

 

 

 

42H

 

Ultra DMA mode 2

 

 

 

 

 

 

 

43H

 

Ultra DMA mode 3

 

 

 

 

 

 

 

44H

 

Ultra DMA mode 4

 

 

 

 

 

 

 

45H

 

Ultra DMA mode 5

 

 

 

 

05H

 

Enable advanced power management

 

 

 

55H

 

Disable read look-ahead (read cache) feature.

 

 

 

82H

 

Disable write cache.

 

 

 

AAH

 

Enable read look-ahead (read cache) feature (default).

 

 

 

F1H

 

Report full capacity available

 

 

 

 

 

Note. At power-on or after a hardware or software reset the default values of the features are as indicated above.

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Momentus 5400.2 PATA Product Manual, Rev. B

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Contents Momentus5400.2 ST9120821A ST9100824A ST98823A ST96812A ST94813A ST93811APage Contents Momentus 5400.2 Pata Product Manual, Rev. B List of Figures Momentus 5400.2 Pata Product Manual, Rev. B Introduction Momentus 5400.2 Pata disc driveMomentus 5400.2 Pata Product Manual, Rev. B Specification summary Drive specificationsSpecifications Average seek time msec typical 12.5 Formatted capacity Default logical geometryLBA mode Physical organizationTechnology Specification Physical characteristicsRecording and interface technology Typical seek times msec Read Write Seek timeTime to ready Time to ready Typical Max @ 25CPower specifications Conducted noise Typical current profileVoltage tolerance Active mode Power-management modesPower management modes Idle modeEnvironmental specifications Nonoperating shock ShockOperating shock VibrationDrive level acoustics AcousticsElectromagnetic immunity Electromagnetic immunityReliability Safety certificationMeasurement type Specification Agency certificationAustralian C-Tick N176 Korean RRLFCC verification Corrosive environment Environmental protectionEuropean Union Restriction of Hazardous Substances RoHS Configuring and mounting the drive Handling and static discharge precautionsMaster/slave configuration Jumper settingsCable-select option Mounting dimensions-top, side and end view Drive mountingMomentus 5400.2 Pata Product Manual, Rev. B Connector Cable Signal Name Contact Conductor ATA interface signals and connector pinsConnector signals Cable Connector Conductor Contact Signal NameSupported commands Supported ATA commandsCommand name Command code in hex ATA-standard commands ATA-standard power-management commands Command name Command code in hexATA-standard security commands Supported commands Identify Device command Word Description ValueXx07H Description if bit is set to Bit Word Bit WordSet Features command Features register valuesInstallation considerations Compatibility summarySystem Compatibility Tested systemsTested Bios versions Bios versions testedVendor Release Revision Software utilities Compatibility test configurationsOperating system versions tested Other certificationPresales Support Seagate Technology support servicesInternet MySeagate Reseller.seagate.com Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call center Presales and Technical Support Warranty Service FAX services-All Europe toll callToll-free support numbers Asia/Pacific support services Publication feedback survey Momentus 5400.2 Pata Product Manual, Rev. B Index NumericsPage Page Momentus 5400.2 Pata Product Manual, Rev. B Page Seagate Technology LLC

ST9120821A, ST98823A, ST94813A, ST9100824A, ST93811A specifications

The Seagate ST96812A, ST93811A, ST9100824A, ST94813A, and ST98823A are notable hard drive models from Seagate’s extensive lineup, each offering distinct features and technologies suitable for various computing needs. Designed predominantly for desktop and enterprise solutions, these drives showcase Seagate's commitment to performance, reliability, and innovative technology.

Starting with the ST96812A, this drive features a storage capacity of 120 GB and utilizes an ATA interface, making it a popular choice during its time for both personal computing and enterprise applications. It is engineered with a 5400 RPM spindle speed, providing a balance between performance and power efficiency. With its 2 MB cache, the ST96812A enables quick access to frequently used data, facilitating smooth operation for everyday tasks.

The ST93811A, with a capacity of 80 GB, builds on the principles of dependable storage. It also operates at 5400 RPM, ensuring consistent performance for users who rely on dependable access to their stored information. The model’s robust design includes a 2 MB buffer, enhancing data transfer speeds and improving overall system responsiveness.

Next, the ST9100824A offers a significant leap in performance with a 100 GB capacity and superior data management capabilities. This drive integrates features like Advanced Format technology, which optimizes sector size for increased storage efficiency and error correction. The spindle speed retains 7200 RPM, providing faster read and write speeds which cater well to intensive applications such as gaming or video editing.

With a focus on higher storage capacity, the ST94813A holds up to 160 GB. This model is particularly notable for its low power consumption and quiet operation, making it suitable for environments where noise reduction is crucial, such as audio production studios or home media centers. The 7200 RPM speed and enhanced cache improve overall performance for multitasking scenarios.

Lastly, the ST98823A’s 250 GB capacity positions it as a higher-end option within this series. Featuring a spindle speed of 7200 RPM and a considerable cache size, it excels in handling larger files and complex applications. This model is geared towards users seeking a fusion of speed and ample storage for applications ranging from database management to creative production.

In summary, the Seagate ST96812A, ST93811A, ST9100824A, ST94813A, and ST98823A hard drives collectively illustrate Seagate's dedication to providing various storage solutions characterized by performance, efficiency, and technological advancement tailored to meet diverse user demands.
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