Seagate ST9146802SS Performance characteristics, Internal drive characteristics, Access time

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4.0Performance characteristics

4.0Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of Sav- vio drives.

4.1Internal drive characteristics

 

ST9146802SS

ST973402SS

 

Drive capacity

146.8

73.4

Gbytes (formatted, rounded off value)

Read/write data heads

4

2

 

Bytes per track

489,984

489,984

Bytes (average, rounded off values)

Bytes per surface

36,704

36,704

Mbytes (unformatted, rounded off value)

Tracks per surface (total)

75,373

75,373

Tracks (user accessible)

Tracks per inch

150,000

150,000

TPI (average)

Peak bits per inch

925,000

925,000

BPI

Areal density

135

135

Gbit/in2

Internal data rate

660-1054

660-1054

Mbits/sec (variable with zone)

Disc rotation speed

10k

10k

rpm

Avg rotational latency

3.0

3.0

msec

4.2Seek performance characteristics

See Section 9.4.1, "SAS physical interface" on page 56 and the SAS Interface Manual (part number 100293071) for additional timing details.

4.2.1Access time

 

 

Including controller overhead1, 2

Not including controller overhead1,2

 

 

(msec)

 

(msec)

 

 

 

Read

Write

Read

Write

Average

Typical3,4

4.0

4.6

3.8

4.4

Single track

Typical3,4

0.4

0.6

0.2

0.4

Full stroke

Typical3,4

8.17

8.76

7.97

8.56

1.Execution time measured from receipt of the Command to the Response.

2.Assumes no errors and no sector has been relocated.

3.Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a representative sample of drives.

4.Access time = controller overhead + average seek time and applies to all data transfer commands. Access to data = access time + latency time.

Data sheet data except full stroke which was Gen 2.0 data.

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

11

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Contents ST9146802SS ST973402SS Savvio 10K.2 SASPage ST9146802SS ST973402SS October Rev. A Revision status summary sheet06/23/06 Initial releasePage 4.0 Performance characteristics Contents5.0 Reliability specifications 6.0 Physical/electrical specifications8.0 Installation 7.0 Defect and error management10.0 Seagate Technology support services 9.0 Interface requirementsList of Figures Page Figure 1. Savvio 10K.2 SAS disc drive 1.0 ScopeSavvio 10K.2 SAS Product Manual, Rev. B 2.1 Standards 2.0 Applicable standards and reference documentation2.1.1 Electromagnetic compatibility 2.1.1.1 Electromagnetic susceptibilityElectromagnetic compliance for the European Union 2.1.2 Electromagnetic complianceAustralian C-Tick Korean MICSavvio 10K.2 SAS Installation Guide 2.2 Reference documentsSCSI Commands Reference Manual Specification for Acoustic Test Requirement and ProceduresSavvio 10K.2 SAS Product Manual, Rev. B 3.0 General description 3.1 Standard features 3.2 Media description3.3 Performance 3.4 Reliability 3.7 Factory-installed accessories3.5 Formatted capacities 3.6 Programmable drive capacity3.8 Factory-installed options 4.1 Internal drive characteristics 4.0 Performance characteristics4.2 Seek performance characteristics 4.2.1 Access time4.2.2 Format command execution time for 512-byte sectors minutes General performance characteristics4.2.3 4.3 Start/stop time 4.4 Prefetch/multi-segmented cache control4.5 Cache operation 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 Error rates 5.0 Reliability specifications5.1.1 Recoverable Errors 5.1.2 Unrecoverable Errors5.1.3 Seek errors 5.2 Reliability and service5.1.4 Interface errors 5.2.2 Preventive maintenance5.2.4 S.M.A.R.T Fully-enabled delayControlling S.M.A.R.T Performance impactDetermining rate Reporting controlPredictive failures 5.2.5 Thermal monitorParameter Code Table 11 Temperature Log Page 0DhDescription 5.2.6 Drive Self Test DST5.2.6.2.2 Invoking DST 5.2.6.2.1 State of the drive prior to testing5.2.6.2.3 Short and extended tests Short test Function Code 001b5.2.6.2.4 Log page entries 5.2.7 Product warranty5.2.6.2.5 Abort ShippingProduct repair and return information 6.1 AC power requirements 6.0 Physical/electrical specifications6.2 DC power requirements Table 12 ST9146802SS DC power requirementsGeneral DC power requirement notes Table 13 ST973402SS DC power requirements6.2.1 Conducted noise immunity 6.2.2 Power sequencing6.2.3 Current profiles +12VFigure 3. ST973402SS current profile 6.3 Power dissipation ST9146802SS in 3 Gbit operationST973402SS in 3 Gbit operation 6.4.1 Temperature 6.4 Environmental limits6.4.3 Effective altitude sea level 6.4.2 Relative humidity6.4.4 Shock and vibration 6.4.4.1 ShockPackage size Packaged/product weightDrop height Figure 7. Recommended mounting6.4.5 Air cleanliness 6.4.4.2 Vibration6.4.6 Corrosive environment 6.4.8 Electromagnetic susceptibility 6.4.7 AcousticsFigure 8. Mounting configuration dimensions 6.5 Mechanical specificationsSavvio 10K.2 SAS Product Manual, Rev. B 7.0 Defect and error management 7.1 Drive internal defects/errors7.2 Drive error recovery procedures Savvio 10K.2 SAS Product Manual, Rev. B 7.4 Background Media Scan 7.3 SAS system errorsTable 14 Read and write retry count maximum recovery times Maximum recovery time per7.5 Media Pre-Scan 7.6 Deferred Auto-Reallocation7.7 Idle Read After Write 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 9.0 Interface requirements 9.1 SAS features9.1.1 task management functions Table 15 SAS task management functions supported9.2 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 Savvio inquiry data 9.3.1 Inquiry data9.3.2 Mode Sense data BytesCHG = Changeable bits indicates if default value is changeable 3. Current values4. Changeable values MODE DATA HEADER 03 fa 00 10 00 00 00 BLOCK DESCRIPTOR Savvio 10K.2 SAS Product Manual, Rev. B 9.4 Miscellaneous operating features and conditions Miscellaneous featuresMiscellaneous status 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 9.4.3 Connector requirements 9.4.2 Physical characteristics9.4.4 Electrical description 9.4.5 Pin descriptions9.4.7 Power 9.5 Signal characteristics9.4.6 SAS transmitters and receivers 9.5.1 Ready LED Out9.5.2 Differential signals LED drive signalTable 26 General interface characteristics 9.5.2.1 Eye masks 9.5.2.1.1 Eye masks overview9.5.2.1.3 Jitter tolerance masks 9.5.2.1.2 Receive eye maskFigure 15. Receive eye mask Figure 16. Reveive tolerance eye masktion X2OP - 0, 5xadditional sinusoidal jitter - X1OPPeak-to sinusoidalTable 27 Transmitter signal characteristics 9.5.2.2 Transmitter signal characteristicsTable 28 Receiver signal characteristics 9.5.2.3 Receiver signal characteristics9.5.2.3.1 Jitter Table 29 Maximum allowable jitter9.5.2.3.2 Receiver jitter tolerance 9.5.2.3.4 Impedance specificationsTable 30 Receiver jitter tolerance 9.5.2.3.3 Compliant jitter test pattern CJTPAT9.5.2.4.1 Transmitter characteristics R0 RRTable 31 Impedance requirements Sheet 2 of 9.5.2.4 Electrical TxRx connections= -10, 884dB = -5, 437dBTx+ TCTF Tx SAS internal connector10 nF ProbeFigure 21. ISI loss example at 1.5 Gbps 9.5.2.5 Receiver characteristicsOnline services 10.0 Seagate Technology support servicesSeagate Service Centers Customer Service OperationsEuropean support services USA/Canada/Latin America support services Seagate Service CentersData Recovery Services Authorized Service CentersAsia/Pacific support services Africa/Middle East support servicesFAX services-All Europe toll call Toll-free support numbersCustomer Service Operations 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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