Seagate ST936701SS manual Performance characteristics, Internal drive characteristics, Access time

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4.0Performance characteristics

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

4.1Internal drive characteristics

 

ST973401SS

ST936701SS

 

Drive capacity

73.4

36.7

Gbytes (formatted, rounded off value)

Read/write data heads

4

2

 

Bytes per track

360,000

360,000

Bytes (average, rounded off values)

Bytes per surface

18,387

18,387

Mbytes (unformatted, rounded off value)

Tracks per surface (total)

51,052

51,052

Tracks (user accessible)

Tracks per inch

105

105

KTPI

Peak bits per inch

660

660

KBPI

Internal data rate

506-753

506-753

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

4.2

4.6

4.0

4.4

Single track

Typical3,4

0.40

0.80

0.20

0.60

Full stroke

Typical3,4

8.3

8.8

8.1

8.6

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.

Savvio SAS Product Manual, Rev. D

11

Image 17
Contents ST973401SS ST936701SS Savvio SASPage Contents Installation Defect and error managementSeagate Technology support services Interface requirementsList of Figures Page Savvio family disc drive ScopeSavvio SAS Product Manual, Rev. D Standards Applicable standards and reference documentationElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance for the European Union Electromagnetic complianceAustralian C-Tick Korean MICSAS Interface Manual Reference documentsSavvio SAS Product Manual, Rev. D General description Performance Standard featuresMedia description Reliability Factory-installed accessoriesFormatted capacities Programmable drive capacityUser-installed accessories Factory-installed optionsInternal drive characteristics Performance characteristicsSeek performance characteristics Access timeGeneral performance characteristics Format command execution time for 512-byte sectors minutesCache operation Start/stop timePrefetch/multi-segmented cache control Caching write data Prefetch operation Savvio SAS Product Manual, Rev. D Error rates Reliability specificationsRecoverable Errors Unrecoverable ErrorsSeek errors Reliability and serviceInterface errors Preventive maintenance4 S.M.A.R.T Hot plugging the driveControlling S.M.A.R.T Performance impactDetermining rate Reporting controlPredictive failures Thermal monitorDrive Self Test DST Temperature Log Page 0Dh Parameter Code DescriptionDST failure definition ImplementationInvoking DST State of the drive prior to testingShort and extended tests Short test Function Code 001bLog page entries Product warrantyAbort ShippingProduct repair and return information AC power requirements Physical/electrical specificationsDC power requirements ST973401SS DC power requirementsST936701SS Gbit mode Amps ST936701SS DC power requirementsGeneral DC power requirement notes Conducted noise immunity Power sequencingCurrent profiles +5V +12VTypical ST973401SS drive +12V current profile Typical ST936701SS drive +12V current profile ST973401SS in 1.5 Gbit operation Power dissipationST973401SS in 3 Gbit operation ST936701SS in 1.5 Gbit operation ST936701SS in 3 Gbit operationRelative humidity TemperatureEnvironmental limits Shock Effective altitude sea levelShock and vibration Recommended mounting Package size Packaged/product weight Drop heightCorrosive environment Air cleanlinessVibration Acoustics Mounting configuration dimensions Mechanical specificationsSavvio SAS Product Manual, Rev. D Drive error recovery procedures Defect and error managementDrive internal defects/errors SAS system errors Drive orientation InstallationAir flow CoolingGrounding Drive mountingSavvio SAS Product Manual, Rev. D Interface requirements SAS featuresDual port support Command name Command code Supported Scsi commands supportedCommands supported by Savvio SAS family drive Commands supported by Savvio SAS family drive Commands supported by Savvio SAS family drive Commands supported by Savvio SAS family drive Inquiry data Mode Sense dataSavvio inquiry data Bytes Data hexPage DEF CHG Savvio SAS Product Manual, Rev. D Miscellaneous features Miscellaneous operating features and conditionsSupported Feature or condition Miscellaneous statusSAS physical interface Datum B Section C C Section a a Connector requirements Physical characteristicsElectrical description Pin descriptionsSAS transmitters and receivers Pin Signal name Signal typeSAS pin descriptions Signal characteristics Characteristic Units Gbps General interface characteristicsEye masks Eye masks overview Receive eye maskReveive tolerance eye mask Jitter tolerance masksSinusoidal Peak-toJitter Frequency in kHzSignal characteristica Units Gbps Transmitter signal characteristicsSignal characteristic Units Gbps Receiver signal characteristicsMaximum allowable jitter Gbps m, n Deterministic jitterqReceiver jitter tolerance Impedance specificationsCompliant jitter test pattern Cjtpat Impedance requirements Sheet 1Electrical TxRx connections Transmitter characteristicsImpedance requirements Sheet 2 = -5,437dB Tctf ISI loss example at 1.5 Gbps Receiver characteristicsSavvio SAS Product Manual, Rev. D Internet Seagate Technology support servicesPresales Support Technical SupportData Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Numerics IndexPage SAS See also cooling
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ST936701SS, ST973401SS specifications

The Seagate ST936701SS and ST973401SS are high-performance enterprise hard drives designed for optimal data storage solutions in demanding environments. Both models belong to Seagate's Savvio series, which is renowned for its reliability and efficiency. These drives are tailored for critical applications such as database management, data warehousing, and online transaction processing.

The ST936701SS comes with a storage capacity of 36.4 GB, while the ST973401SS offers a larger capacity of 73.4 GB. This variance allows users to choose the drive that best suits their storage needs without compromising performance. Both drives utilize a 2.5-inch form factor, making them compact and suitable for high-density storage configurations.

A key feature of these drives is their impressive rotational speed of 10,000 RPM, which enhances data access times and improves overall system responsiveness. This speed allows for reduced latency and faster data transfer rates, critical for applications that require quick retrieval of large datasets.

In terms of technology, these drives utilize the Serial Attached SCSI (SAS) interface, which is favored in enterprise settings for its reliability and speed. SAS provides better performance than traditional SATA drives, particularly when dealing with high workloads, as it supports multiple concurrent connections and higher data throughput.

The ST936701SS and ST973401SS are also equipped with advanced features such as Seagate's Native Command Queuing (NCQ), which optimizes the order in which read and write commands are executed. This results in improved performance under multi-tasking conditions, essential for enterprise servers managing multiple requests simultaneously.

Additionally, both drives incorporate features aimed at enhancing data integrity and reliability. They support End-to-End Data Protection and are designed to endure the rigors of continuous operation, with MTBF (Mean Time Between Failures) ratings that bolster their reputation for durability.

Energy efficiency is another notable characteristic, as both drives are designed to reduce power consumption without sacrificing performance. This is particularly important in enterprise environments where power management contributes to lower operational costs.

In conclusion, the Seagate ST936701SS and ST973401SS drives are robust, reliable storage solutions tailored for enterprise applications. With their high performance, advanced technology features, and capacity options, they provide organizations with the scalability and efficiency required in today’s data-driven landscape. Whether it's for critical data management tasks or high-access applications, these drives stand out as a solid choice for any enterprise storage strategy.