Seagate ST9146802SS, ST973402SS Ready LED Out conditions, LED drive signal, Differential signals

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LED drive signal

Table 24: Ready LED Out conditions

Normal command activity

LED status

 

 

Format in progress, each cylinder change

Toggles on/off

 

 

The Ready LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper +3.3 volt supply through an appropriate current limiting resistor. The LED and the current limiting resis- tor are external to the drive. See Table 25 for the output characteristics of the LED drive signals.

Table 25:

LED drive signal

 

 

 

 

 

State

 

Test condition

Output voltage

 

 

 

 

LED off, high

 

0 V ≤ VOH ≤ 3.6 V

-100 µA < IOH < 100 µA

 

 

 

 

LED on, low

 

IOL = 15 mA

0 ≤ VOL ≤ 0.225 V

 

 

 

 

9.5.2Differential signals

The drive SAS differential signals comply with the intra-enclosure (internal connector) requirements of the SAS standard.

Table 26 defines the general interface characteristics.

Table 26: General interface characteristics

Characteristic

Units

1.5 Gbps

3.0 Gbps

 

 

 

 

Bit rate (nominal)

Mbaud

1,500

3,000

 

 

 

 

Unit interval (UI)(nominal)

ps

666.6

333.3

 

 

 

 

Impedance (nominal, differential )

ohm

100

100

 

 

 

 

Transmitter transients, maximum

V

± 1.2

± 1.2

 

 

 

 

Receiver transients, maximum

V

± 1.2

± 1.2

 

 

 

 

9.5.2.1Eye masks

9.5.2.1.1Eye masks overview

The eye masks are graphical representations of the voltage and point. The time values between X1 and (1 - X1) cover all but 10-12of the total jitter population has a range of ± 7 standard deviations.

time limits on the signal at the compliance of the jitter population. The random content

Savvio 10K.2 SAS Product Manual, Rev. B

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Contents ST9146802SS ST973402SS Savvio 10K.2 SASPage ST9146802SS ST973402SS October Initial release Revision status summary sheetRev. A 06/23/06Page 6.0 Physical/electrical specifications Contents4.0 Performance characteristics 5.0 Reliability specifications9.0 Interface requirements 7.0 Defect and error management8.0 Installation 10.0 Seagate Technology support servicesList of Figures Page Figure 1. Savvio 10K.2 SAS disc drive 1.0 ScopeSavvio 10K.2 SAS Product Manual, Rev. B 2.1.1.1 Electromagnetic susceptibility 2.0 Applicable standards and reference documentation2.1 Standards 2.1.1 Electromagnetic compatibilityKorean MIC 2.1.2 Electromagnetic complianceElectromagnetic compliance for the European Union Australian C-TickSpecification for Acoustic Test Requirement and Procedures 2.2 Reference documentsSavvio 10K.2 SAS Installation Guide SCSI Commands Reference ManualSavvio 10K.2 SAS Product Manual, Rev. B 3.0 General description 3.3 Performance 3.1 Standard features3.2 Media description 3.6 Programmable drive capacity 3.7 Factory-installed accessories3.4 Reliability 3.5 Formatted capacities3.8 Factory-installed options 4.2.1 Access time 4.0 Performance characteristics4.1 Internal drive characteristics 4.2 Seek performance characteristics4.2.3 4.2.2 Format command execution time for 512-byte sectors minutesGeneral performance characteristics 4.5 Cache operation 4.3 Start/stop time4.4 Prefetch/multi-segmented cache control 4.5.2 Prefetch operation 4.5.1 Caching write dataSavvio 10K.2 SAS Product Manual, Rev. B Savvio 10K.2 SAS Product Manual, Rev. B 5.1.2 Unrecoverable Errors 5.0 Reliability specifications5.1 Error rates 5.1.1 Recoverable Errors5.2.2 Preventive maintenance 5.2 Reliability and service5.1.3 Seek errors 5.1.4 Interface errorsPerformance impact Fully-enabled delay5.2.4 S.M.A.R.T Controlling S.M.A.R.T5.2.5 Thermal monitor Reporting controlDetermining rate Predictive failures5.2.6 Drive Self Test DST Table 11 Temperature Log Page 0DhParameter Code DescriptionShort test Function Code 001b 5.2.6.2.1 State of the drive prior to testing5.2.6.2.2 Invoking DST 5.2.6.2.3 Short and extended testsShipping 5.2.7 Product warranty5.2.6.2.4 Log page entries 5.2.6.2.5 AbortProduct repair and return information Table 12 ST9146802SS DC power requirements 6.0 Physical/electrical specifications6.1 AC power requirements 6.2 DC power requirementsGeneral DC power requirement notes Table 13 ST973402SS DC power requirements+12V 6.2.2 Power sequencing6.2.1 Conducted noise immunity 6.2.3 Current profilesFigure 3. ST973402SS current profile ST973402SS in 3 Gbit operation 6.3 Power dissipationST9146802SS in 3 Gbit operation 6.4.1 Temperature 6.4 Environmental limits6.4.4.1 Shock 6.4.2 Relative humidity6.4.3 Effective altitude sea level 6.4.4 Shock and vibrationFigure 7. Recommended mounting Packaged/product weightPackage size Drop height6.4.6 Corrosive environment 6.4.5 Air cleanliness6.4.4.2 Vibration 6.4.8 Electromagnetic susceptibility 6.4.7 AcousticsFigure 8. Mounting configuration dimensions 6.5 Mechanical specificationsSavvio 10K.2 SAS Product Manual, Rev. B 7.2 Drive error recovery procedures 7.0 Defect and error management7.1 Drive internal defects/errors Savvio 10K.2 SAS Product Manual, Rev. B Maximum recovery time per 7.3 SAS system errors7.4 Background Media Scan Table 14 Read and write retry count maximum recovery times7.7 Idle Read After Write 7.5 Media Pre-Scan7.6 Deferred Auto-Reallocation 8.1 Drive orientation 8.0 InstallationFigure 10. Air flow 8.2 Cooling8.4 Grounding 8.3 Drive mountingSavvio 10K.2 SAS Product Manual, Rev. B Table 15 SAS task management functions supported 9.1 SAS features9.0 Interface requirements 9.1.1 task management functions9.2 Dual port support Table 17 Commands supported by Savvio SAS family drive 9.3 SCSI commands supportedTable 17 Commands supported by Savvio SAS family drive continued Table 17 Commands supported by Savvio SAS family drive continued Table 17 Commands supported by Savvio SAS family drive continued Bytes 9.3.1 Inquiry dataSavvio inquiry data 9.3.2 Mode Sense data4. Changeable values CHG = Changeable bits indicates if default value is changeable3. Current values MODE DATA HEADER 03 fa 00 10 00 00 00 BLOCK DESCRIPTOR Savvio 10K.2 SAS Product Manual, Rev. B Miscellaneous status 9.4 Miscellaneous operating features and conditionsMiscellaneous features Figure 11. Physical interface 9.4.1 SAS physical interfaceC OF DATUM B L Figure 12. SAS device plug dimensionsFigure 13. SAS device plug dimensions detail 9.4.5 Pin descriptions 9.4.2 Physical characteristics9.4.3 Connector requirements 9.4.4 Electrical description9.5.1 Ready LED Out 9.5 Signal characteristics9.4.7 Power 9.4.6 SAS transmitters and receivers9.5.2.1 Eye masks 9.5.2.1.1 Eye masks overview LED drive signal9.5.2 Differential signals Table 26 General interface characteristicsFigure 16. Reveive tolerance eye mask 9.5.2.1.2 Receive eye mask9.5.2.1.3 Jitter tolerance masks Figure 15. Receive eye masksinusoidal X2OP - 0, 5xadditional sinusoidal jitter - X1OPtion Peak-toTable 27 Transmitter signal characteristics 9.5.2.2 Transmitter signal characteristicsTable 29 Maximum allowable jitter 9.5.2.3 Receiver signal characteristicsTable 28 Receiver signal characteristics 9.5.2.3.1 Jitter9.5.2.3.3 Compliant jitter test pattern CJTPAT 9.5.2.3.4 Impedance specifications9.5.2.3.2 Receiver jitter tolerance Table 30 Receiver jitter tolerance9.5.2.4 Electrical TxRx connections R0 RR9.5.2.4.1 Transmitter characteristics Table 31 Impedance requirements Sheet 2 of= -10, 884dB = -5, 437dBProbe SAS internal connectorTx+ TCTF Tx 10 nFFigure 21. ISI loss example at 1.5 Gbps 9.5.2.5 Receiver characteristicsCustomer Service Operations 10.0 Seagate Technology support servicesOnline services Seagate Service CentersAuthorized Service Centers USA/Canada/Latin America support services Seagate Service CentersEuropean support services Data Recovery ServicesToll-free support numbers Africa/Middle East support servicesAsia/Pacific support services FAX services-All Europe toll callCall center Numerics IndexPage Page See also cooling Page Seagate Technology LLC
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ST973402SS, ST9146802SS specifications

The Seagate ST973402SS and ST9146802SS are high-performance, enterprise-grade hard drives designed to meet the demanding needs of data-intensive applications. These drives are part of Seagate's Savvio and Barracuda product lines, aimed specifically at businesses and institutions requiring reliability, speed, and efficiency in storage solutions.

The ST973402SS is a 73GB, 2.5-inch hard drive, while the ST9146802SS offers a larger capacity of 146GB. Both models utilize a 10,000 RPM spindle speed, which significantly enhances their ability to handle fast data read and write operations. This speed ensures reduced latency and improved overall performance, making them ideal for environments where rapid access to data is crucial.

One of the standout features of these drives is their support for Serial Attached SCSI (SAS) interface. SAS technology provides a point-to-point connection, which allows for increased data transfer rates compared to traditional SATA drives. The ST973402SS and ST9146802SS are capable of transferring data at speeds of up to 600 MB/s, facilitating efficient data transfers in enterprise systems.

In terms of reliability, both models offer advanced features designed to improve data integrity and durability. They are built to withstand high workloads, with an annualized workload rate of up to 550 TB per year. This makes them well-suited for applications like databases and transactional storage, where sustained performance is required. Additionally, the drives feature Seagate’s PowerFit technology, which optimizes performance while minimizing power consumption.

To enhance data security, the drives come equipped with self-encrypting technology, ensuring that sensitive data is protected through hardware-based encryption. This is particularly important in environments where data breaches can lead to significant operational impacts.

The drives are also designed to operate efficiently in terms of thermal management, featuring robust heat dissipation capabilities. This helps to maintain optimal performance levels while prolonging the lifespan of the drives.

Overall, the Seagate ST973402SS and ST9146802SS are robust and reliable hard drives that cater to the needs of enterprise environments, combining high capacity, exceptional speed, advanced security features, and energy efficiency to help businesses maintain and manage large volumes of data effectively. With their proven performance and innovative technologies, these drives are well-equipped to support a wide range of applications in modern data centers.
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