Reliability specifications, Error rates | Seagate ST3400755FC

5.0Reliability 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 10 errors 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 with minimum receive eye.
	Less than 1 error in 1014 bits transferred with typical receive eye.
	See Section 9.6.4, "FC Differential input." on page 69
MTBF	1,400,000 hours
Annualized Failure Rate (AFR):	0.62%
Preventive maintenance:	None required

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

5.1Error 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 Section 6.2

•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.

5.1.1Recoverable Errors

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

Recoverable Data errors will use correction, although ECC on-the-fly is not considered for purposes of recov- ered error specifications.

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.

5.1.2Unrecoverable Errors

Unrecoverable Data Errors (Sense Key = 03h) are specified at less than 1 sector in error per 1016 bits trans- ferred. Unrecoverable Data Errors resulting from the same cause are treated as 1 error for that block.

Cheetah NS FC Product Manual, Rev. B

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Seagate ST3400755FC, ST3300955FC manual Reliability specifications, Error rates, Recoverable Errors, Unrecoverable Errors

Contents

ST3400755FC ST3300955FC Cheetah NS FCPage Cheetah NS FC Product Manual, Rev. B Cheetah NS FC Product Manual, Rev. B Contents Installation Defect and error managementInterface requirements Seagate Technology support services Cheetah NS FC Product Manual, Rev. B List of Figures Page Scope Cheetah NS FC Product Manual, Rev. B Standards Standards, compliance and reference documentsElectromagnetic compatibility Electromagnetic susceptibility Compliance Ncits TR-19 Reference documents Cheetah NS FC Product Manual, Rev. B General description Media description Standard features Reliability PerformanceFormatted capacities Programmable drive capacity User-installed accessories Factory-installed options Internal drive characteristics Performance characteristicsAccess time Seek performance General performance characteristics Format command execution time minutesStart/stop time Cache operation Prefetch/multi-segmented cache controlCaching write data Prefetch operation Error rates Reliability specificationsRecoverable Errors Unrecoverable Errors Seek errors Reliability and serviceInterface errors Preventive maintenance Controlling S.M.A.R.T 4 S.M.A.R.TPerformance impact Milliseconds Determining rate Reporting controlPredictive failures Thermal monitor Parameter Code Description State of the drive prior to testingDrive Self Test DST DST failure definition Short and extended tests Invoking DSTShort test Function Code 001b Extended test Function Code 010b Abort Product warrantyShipping Product repair and return information Cheetah NS FC Product Manual, Rev. B AC power requirements Physical/electrical specificationsDC power requirements DC power requirements for ST3400755FC model Gbit Amps DC power requirements for ST3300955FC model Gbit Amps General DC power requirement notes Conducted noise immunity Power sequencing Current profiles Cheetah NS FC Product Manual, Rev. B ST3400755 CURRENT/POWER vs Throughput FC 4GB Power dissipationST3400755FC Random 8 Block Reads ST3300955FC ST3300955 CURRENT/POWER vs Throughput FC 4GB Environmental limits TemperatureRelative humidity Effective altitude sea level Package size Packaged/product weight Drop heightShock and vibration Shock Recommended mounting Vibration Air cleanlinessAcoustics Corrosive environment China Restriction of Hazardous Substances RoHS Directive X表示该部件（于同类物品程度上）所含的危险和有毒物质中国RoHS MCV标准所定义的门槛值。 Mounting configuration dimensions Mechanical specifications Cheetah NS FC Product Manual, Rev. B Drive internal defects/errors Defect and error managementDrive error recovery procedures 77.87 Background Media Scan FC-AL system errorsMedia Pre-Scan Idle Read After Write Deferred Auto-Reallocation Drive ID/option selection InstallationDrive orientation Cooling Air flow Drive mounting Grounding Cheetah NS FC Product Manual, Rev. B Fibre Channel link service frames FC-AL featuresLink services supported Type of frame Interface requirements Fibre Channel task management responses Fibre Channel task management functionsFC Scsi FCP response codes Function name Response code NPort login Plogi payload Bytes Fibre Channel port login Fibre Channel Process Login Fibre Channel port login acceptNPort Login Accept ACC payload Bytes Process Login Plri payload Fibre Channel fabric login Fibre Channel Process Login AcceptProcess Login Accept ACC payload Bytes Fabric Login Flogi payload Bytes Fabric Login Accept ACC payload Bytes Fibre Channel fabric accept login Fibre Channel Arbitrated Loop options Dual port supportFC-AL options supported Option Supported Supported commands Command code Command name Scsi commands supported Verify error recovery page 07h Cheetah NS FC Product Manual, Rev. B Temperature page 0Dh Inquiry data Mode Sense dataCheetah NS FC inquiry data Bytes Data hex Page Mode Sense 10 Byte Header Data Mode Data Header Miscellaneous features Miscellaneous operating features and conditionsSupported Feature or condition Miscellaneous status FC-AL physical interface Physical characteristicsPhysical description Electrical description Connector requirementsPin descriptions Pin Signal name Signal type FC-SCA pin descriptions Pin Signal name Signal typeFC-AL transmitters and receivers Fault LED Out Power Active LED Out Enable port bypass signalsMotor start controls 11 SEL6 through SEL0 ID lines Parallel Enclosure Services Interface ESI Arbitrated loop physical address Alpa values SettingHex Dec TTL input characteristics Signal characteristicsDevice control codes FC Differential output LED driver signalsFC Differential input Receive eye diagram Eye diagram data values Link rate GHz Internet Seagate Technology support servicesPresales Support Technical Support Data Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Numerics Index FAN Flogi Plogi SEL ID See also cooling