Seagate ST9146653SS, ST9300653SS manual Reliability specifications, Error rates, Recoverable Errors

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6.0Reliability specifications

The following reliability specifications assume correct host and drive operational interface, including all inter- face timings, power supply voltages, environmental requirements and drive mounting constraints.

Seek error rate:

Less than 10 errors in 108 seeks

Read Error Rates1

 

Recovered Data

Less than 1 error in 1012 bits transferred (OEM default settings)

Unrecovered Data

Less than 1 sector in 1016 bits transferred

Miscorrected Data

Less than 1 sector in 1021 bits transferred

Interface error rate:

Less than 1 error in 1012 bits transferred

Mean Time Between Failure (MTBF): 2,000,000 hours

Annualized Failure Rate (AFR)

0.44%

Preventive maintenance:

None required

1. Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.

6.1Error rates

The error rates stated in this manual assume the following:

•The drive is operated in accordance with this manual using DC power as defined in paragraph 7.3, "DC power requirements."

•Errors caused by host system failures are excluded from error rate computations.

•Assume random data.

•Default OEM error recovery settings are applied. This includes AWRE, ARRE, full read retries, full write retries and full retry time.

6.1.1Recoverable Errors

Recoverable errors are those detected and corrected by the drive, and do not require user intervention.

Recoverable Data errors will use Error Correction when needed.

Recovered Data error rate is determined using read bits transferred for recoverable errors occurring during a read, and using write bits transferred for recoverable errors occurring during a write.

6.1.2Unrecoverable Errors

An unrecoverable data error is defined as a failure of the drive to recover data from the media. These errors occur due to head/media or write problems. Unrecoverable data errors are only detected during read opera- tions, but not caused by the read. If an unrecoverable data error is detected, a MEDIUM ERROR (03h) in the Sense Key will be reported. Multiple unrecoverable data errors resulting from the same cause are treated as 1 error.

Savvio 15K.3 SAS Product Manual, Rev. A

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Contents SED FIPS140-2 Models ST9300653SSST9300553SS ST9146853SSST9146753SSST9300453SS ST9146653SS Standard Models Self-Encrypting Drive ModelsPage Contents Interface requirements Defect and error managementInstallation About Fips About self-encrypting drivesPage Savvio 15K.3 SAS Product Manual, Rev. a List of Figures Page Seagate Online Support and Services Seagate Technology support servicesScope Electromagnetic susceptibility Applicable standards and reference documentationStandards Electromagnetic compatibilityKorean KCC Electromagnetic complianceElectromagnetic compliance for the European Union Australian C-TickEuropean Union Restriction of Hazardous Substances RoHS Reference documents Scsi Commands Reference Manual SAS Interface ManualGeneral description Media description Standard featuresFormatted capacities PerformanceReliability Programmable drive capacity Factory installed optionsAccess time Performance characteristicsInternal drive characteristics Seek performance characteristicsStart/stop time Format command execution timeGeneral performance characteristics Cache operation Prefetch/multi-segmented cache controlPrefetch operation Caching write dataUnrecoverable Errors Reliability specificationsError rates Recoverable ErrorsPreventive maintenance Reliability and serviceSeek errors Interface errorsPerformance impact Maximum processing delay4 S.M.A.R.T Controlling S.M.A.R.TThermal monitor Temperature Log Page 0Dh Parameter Code DescriptionPredictive failures Implementation State of the drive prior to testingDrive Self Test DST DST failure definitionLog page entries Short and extended testsShort test Function Code 001b Extended test Function Code 010bStorage Product warrantyShipping Product repair and return informationPowerChoice modes Physical/electrical specificationsPowerChoiceTM power management DC power requirements AC power requirementsRegulation 300GB models DC power requirements146GB models DC power requirements Conducted noise immunity General DC power requirement notesPower sequencing Current profile for 300GB models Current profilesCurrent profile for 146GB models 300GB models in 3Gb operation Power dissipation300GB models in 6Gb operation 146GB models in 3Gb operation 146GB models in 6Gb operationRelative humidity Temperature a. OperatingEnvironmental limits Shock Effective altitude sea level a. OperatingShock and vibration Recommended mounting Vibration a. Operating-normalAcoustics Air cleanlinessCorrosive environment Dimensions Mechanical specificationsLevel 2 security About FipsPurpose Data encryption Controlled accessAdmin SP About self-encrypting drivesData bands Default passwordRandom number generator RNG Drive lockingCryptographic erase Authenticated firmware downloadPower requirements Supported commandsDrive error recovery procedures Defect and error managementDrive internal defects/errors Background Media Scan SAS system errorsIdle Read After Write Media Pre-ScanDeferred Auto-Reallocation Identifying a Protection Information drive Setting and determining the current Type LevelProtection Information PI Levels of PIDrive orientation InstallationAir flow CoolingGrounding Drive mountingInterface requirements SAS featuresDual port support Scsi commands supportedSupported commands Supported commands Supported commands Supported commands Savvio inquiry data Mode Sense dataInquiry data Page Mode Data Header Mode Data Header Miscellaneous status Miscellaneous operating features and conditionsMiscellaneous features SAS physical interface Datum B Section C C Section a a Pin descriptions Physical characteristicsConnector requirements Electrical descriptionReady LED Out Signal characteristicsPower SAS transmitters and receiversGeneral interface characteristics SAS-2 Specification complianceLED drive signal Differential signalsNumerics IndexPage Msid Mtbf See also cooling Page Savvio 15K.3 SAS Product Manual, Rev. a
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