Seagate ST3300557SS, ST3300657SS manual Reliability and service, Seek errors, Interface errors

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5.1.3Seek errors

A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails, a seek positioning error (Error code = 15h or 02h) will be reported with a Hardware error (04h) in the Sense Key. Recoverable seek errors are specified at Less than 10 errors in 108 seeks. Unrecoverable seek errors (Sense Key = 04h) are classified as drive failures.

5.1.4Interface errors

An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the device port connected to the receiver. The error may be detected as a running disparity error, illegal code, loss of word sync, or CRC error.

5.2Reliability and service

You can enhance the reliability of Cheetah disk drives by ensuring that the drive receives adequate cooling. Section 6.0 provides temperature measurements and other information that may be used to enhance the ser- vice life of the drive. Section 9.2 provides recommended air-flow information.

5.2.1Annualized Failrue Rate (AFR) and Mean time between failure (MTBF)

These drives shall achieve an AFR of 0.55% (MTBF of 1,600,000 hours) when operated in an environment that ensures the HDA case temperatures do not exceed the values specified in Section 6.4.

Operation at case temperatures outside the specifications in Section 6.4 may increase the AFR (decrease the MTBF). AFR and MTBF statistics are population statistics that are not relevant to individual units.

AFR and MTBF specifications are based on the following assumptions for Enterprise Storage System environ- ments:

•8,760 power-on hours per year.

•250 average on/off cycles per year.

•Operations at nominal voltages.

•Systems will provide adequate cooling to ensure the case temperatures specified in Section 6.4.1 are not exceeded.

5.2.2Preventive maintenance

No routine scheduled preventive maintenance is required.

5.2.3Hot plugging the drive

When a disk is powered on by switching the power or hot plugged, the drive runs a self test before attempting to communicate on its’ interfaces. When the self test completes successfully, the drive initiates a Link Reset starting with OOB. An attached device should respond to the link reset. If the link reset attempt fails, or any time the drive looses sync, the drive initiated link reset. The drive will initiate link reset once per second but alternates between port A and B. Therefore each port will attempt a link reset once per 2 seconds assuming both ports are out of sync..

If the self-test fails, the does not respond to link reset on the failing port.

Note. It is the responsibility of the systems integrator to assure that no temperature, energy, voltage haz- ard, or ESD potential hazard is presented during the hot connect/disconnect operation. Discharge the static electricity from the drive carrier prior to inserting it into the system.

Caution. The drive motor must come to a complete stop prior to changing the plane of operation. This time is required to insure data integrity.

Cheetah 15K.7 SAS Product Manual, Rev. A

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Contents Standard models Self-Encrypting Drive models Cheetah 15K.7 SASPage Contents Interface requirements Defect and error managementInstallation About self-encrypting drivesSeagate Technology support services Cheetah 15K.7 SAS Product Manual, Rev. a Model Number Capacity Self-Encrypting Drive SED ScopeElectromagnetic susceptibility Standards, compliance and reference documentsStandards Electromagnetic compatibilityEuropean Union Restriction of Hazardous Substances RoHS ComplianceReference documents General description Media description Standard featuresPerformance Programmable drive capacity Factory-installed optionsReliability Formatted capacitiesSeek time Performance characteristicsInternal drive characteristics Access timeGeneral performance characteristics Format command execution time minutesStart/stop time Cache operation Prefetch/multi-segmented cache controlPrefetch operation Caching write dataUnrecoverable Errors Reliability specificationsError rates Recoverable ErrorsPreventive maintenance Reliability and serviceSeek errors Interface errorsMilliseconds 4 S.M.A.R.TControlling S.M.A.R.T Performance impactThermal monitor Reporting controlDetermining rate Predictive failuresDST failure definition Temperature Log Page 0Dh Parameter Code DescriptionState of the drive prior to testing Drive Self Test DSTExtended test Function Code 010b Invoking DSTShort and extended tests Short test Function Code 001bProduct repair and return information Product warrantyAbort ShippingAC power requirements Physical/electrical specificationsDC power requirements ST3600057SS ST3600957SS Gbit mode Amps 600 GB DC power requirementsST3450857SS ST3450757SS Gbit mode Amps 450 GB DC power requirementsST3300657SS ST3300557SS Gbit mode Amps 300 GB DC power requirementsConducted noise immunity Power sequencingCurrent profiles Typical 600GB current profiles Typical 300GB current profiles ST3600057SS model Power dissipationST3450857SS model Environmental limits TemperatureST3300657SS model Shock Relative humidityEffective altitude sea level Shock and vibrationPackage size Packaged/product weight Drop height Recommended mounting VibrationRoHS compliance statement Air cleanlinessAcoustics Corrosive environmentPhysical dimensions Mechanical specificationsData encryption Controlled accessAdmin SP About self-encrypting drivesData bands Authenticated firmware downloadRandom number generator RNG Drive lockingSupported commands Power requirementsDrive internal defects/errors Defect and error managementDrive error recovery procedures Page Background Media Scan SAS system errorsDeferred Auto-Reallocation Media Pre-ScanIdle Read After Write Drive orientation InstallationCooling Grounding Drive mountingInterface requirements SAS featuresDual port support Scsi commands supportedCommands supported by Cheetah 15K.6 SAS family drives Command name Command code SupportedCommands supported by Cheetah 15K.6 SAS family drives Commands supported by Cheetah 15K.6 SAS family drives Commands supported by Cheetah 15K.6 SAS family drives Cheetah 15K.7 inquiry data Bytes Data hex Inquiry dataMode Sense data Mode Pages 10.3.2.1 ST3600057SS and ST3600957SS Mode Sense dataDEF CHG Mode Data Header Block Descriptor Mode Pages 10.3.2.2 ST3450857SS and ST3450757SS Mode Sense dataDEF CHG Read Capacity Data Buffer C D E F Mode Pages 10.3.2.3 ST3300657SS and ST3300557SS Mode Sense dataMiscellaneous status Miscellaneous operating features and conditionsMiscellaneous features Supported Feature or conditionPhysical interface SAS physical interfaceDatum B Connector requirements Physical characteristicsSAS pin descriptions Pin Signal name Signal typeElectrical description Pin descriptionsReady LED Out Signal characteristicsPower SAS transmitters and receiversGeneral interface characteristics SAS-2 Specification complianceLED drive signal Differential signalsPresales Support Seagate Technology support servicesTechnical Support Data Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call CenterToll-freeDirect dialFAX Cheetah 15K.7 SAS Product Manual, Rev. a Numerics IndexPage SAS Smart
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