Seagate ST973451SS, ST936751SS manual Standard features, Media description, Performance

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3.1Standard features

Savvio drives have the following standard features:

•Perpendicular recording technology

•1.5 / 3 Gbit Serial Attached SCSI (SAS) interface

•Integrated dual port SAS controller supporting the SCSI protocol

•Support for SAS expanders and fanout adapters

•Firmware downloadable using the SAS interface

•128-deep task set (queue)

•Supports up to 32 initiators

•Jumperless configuration

•User-selectable logical block size (512, 520, 524, or 528 bytes per logical block)

•Industry standard SFF 2.5-inch dimensions

•Programmable logical block reallocation scheme

•Flawed logical block reallocation at format time

•Programmable auto write and read reallocation

•Reallocation of defects on command (Post Format)

•ECC maximum burst correction length of 320 bits

•No preventive maintenance or adjustments required

•Dedicated head landing zone

•Embedded servo design

•Automatic shipping lock

•Self diagnostics performed when power is applied to the drive

•Zone bit recording (ZBR)

•Vertical, horizontal, or top down mounting

•Dynamic spindle brake

•16 Mbyte data buffer (see Section 4.5)

•Drive Self Test (DST)

•Background Media Scan (BGMS)

•Idle Read After Write (IRAW)

•Power Save

3.2Media description

The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection.

3.3Performance

•Firmware-controlled multisegmented cache designed to dynamically adjust segments for enhanced system performance

•300 Mbytes/sec maximum instantaneous data transfers

•15k RPM spindle. Average latency = 2.0 msec

•Background processing of queue

•Supports start and stop commands (spindle stops spinning)

•Adaptive seek velocity; improved seek performance

8	Savvio 15K SAS Product Manual, Rev. B

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Contents Savvio 15K SAS 100407739 Rev. BPage Revision status summary sheet Savvio 15K SAS Product Manual, Rev. B Contents Defect and error management InstallationSeagate Technology support services Interface requirementsList of Figures Page Scope Savvio 15K SAS Product Manual, Rev. B Applicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance Electromagnetic compliance for the European UnionAustralian C-Tick Korean MICReference documents European Union Restriction of Hazardous Substances RoHSSavvio 15K SAS Product Manual, Rev. B General description Media description Standard featuresPerformance Factory-installed accessories ReliabilityFormatted capacities Programmable drive capacityOptions Performance characteristics Internal drive characteristicsSeek performance characteristics Access time Gen 2.0 LP dataFormat command execution time General performance characteristicsPrefetch/multi-segmented cache control Start/stop timeCache operation Caching write data Prefetch operationReliability specifications Error ratesRecoverable Errors Unrecoverable ErrorsReliability and service Seek errorsInterface errors Preventive maintenance4 S.M.A.R.T Controlling S.M.A.R.TPerformance impact Reporting controlTemperature Log Page 0Dh Predictive failuresThermal monitor Parameter Code DescriptionState of the drive prior to testing DST failure definitionImplementation Invoking DSTProduct warranty Short test Function Code 001bExtended test Function Code 010b Log page entriesShipping Product repair and return informationSavvio 15K SAS Product Manual, Rev. B Physical/electrical specifications AC power requirementsDC power requirements ST973451SS DC power requirementsST936751SS DC power requirements General DC power requirement notesConducted noise immunity Power sequencingCurrent profiles Typical ST936751SS current profile ST973451SS in 3 Gbit operation Power dissipationST973451SS in 1.5 Gbit operation ST936751SS in 3 Gbit operation ST936751SS in 1.5 Gbit operationEnvironmental limits TemperatureRelative humidity Shock and vibration Effective altitude sea levelShock Recommended mounting Vibration Air cleanlinessCorrosive environment Acoustics Mechanical specifications Mounting configuration dimensionsDrive internal defects/errors Defect and error managementDrive error recovery procedures SAS system errors Media Pre-Scan Background Media ScanDeferred Auto-Reallocation Idle Read After Write Installation Drive orientationCooling Air flowDrive mounting GroundingSavvio 15K SAS Product Manual, Rev. B SAS features Interface requirementsDual port support Scsi commands supported Commands supported by Savvio SAS family driveCommands 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 Page Mode Data Header 04 45 dc cc 00 00 02 Miscellaneous features Miscellaneous operating features and conditionsMiscellaneous status SAS physical interface Datum B Section C C Section a a Physical characteristics Connector requirementsElectrical description Pin descriptionsSAS pin descriptions SAS transmitters and receiversSignal characteristics Eye masks Eye masks overview General interface characteristicsReceive eye mask Jitter tolerance masks Z1 OPTransmitter signal characteristics Peak-toSinusoidal JitterReceiver signal characteristics Receiver jitter tolerance Maximum allowable jitterCompliant jitter test pattern Cjtpat Impedance specifications Impedance requirements Sheet 1Impedance requirements Sheet 2 Transmitter characteristicsElectrical TxRx connections = -5,437dB Shows the zero-length test load Receiver characteristics Savvio 15K SAS Product Manual, Rev. B Seagate Technology support services InternetPresales Support Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Index NumericsPage SAS See also cooling