Seagate ST9600205FC, ST9900805FC manual Reliability and service, Seek errors, Interface errors

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6.1.3Seek 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.

6.1.4Interface 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. The total error rate for a loop of devices is the sum of the individual device error rates.

6.2Reliability and service

You can enhance the reliability of disk drives by ensuring that the drive receives adequate cooling. Section 7.0 provides temperature measurements and other information that may be used to enhance the service life of the drive. Section 9.2 provides recommended air-flow information.

6.2.1Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)

These drives shall achieve an AFR of 0.44% (MTBF of 2,000,000 hours) when operated in an environment that ensures the HDA case temperatures do not exceed the values specified in Section 7.5.1.

Operation at case temperatures outside the specifications in Section 7.5.1 may increase the AFR (decrease the MTBF).

AFR and MTBF statistics are population statistics that are not relevant to individual units. AFR and MTBF spec- ifications are based on the following assumptions for Enterprise Storage System environments:

•8,760 power-on hours per year

•250 average on/off cycles per year

•Operating at nominal voltages

•System provides adequate cooling to ensure the case temperatures specified in Section 7.5.1 are not exceeded.

6.2.2Preventive maintenance

No routine scheduled preventive maintenance is required.

6.2.3Hot plugging the drive

Inserting and removing the drive on the FC-AL will interrupt loop operation. The interruption occurs when the receiver of the next device in the loop must synchronize to a different input signal. FC error detection mecha- nisms, character sync, running disparity, word sync, and CRC are able to detect any error. Recovery is initiated based on the type of error.

The disk drive defaults to the FC-AL Monitoring state, Pass-through state, when it is powered-on by switching the power or hot plugged. The control line to an optional port bypass circuit (external to the drive), defaults to the Enable Bypass state. If the bypass circuit is present, the next device in the loop will continue to receive the output of the previous device to the newly inserted device. If the bypass circuit is not present, loop operation is temporarily disrupted until the next device starts receiving the output from the newly inserted device and regains synchronization to the new input.

Savvio 10K.5 FC Product Manual, Rev. D

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Contents ST9900805FC ST9600205FC ST9450405FC ST9300605FC Savvio 10K.5 FCRevision history Contents Installation Savvio 10K.5 FC Product Manual, Rev. D Iii Savvio 10K.5 FC Product Manual, Rev. D Seagate Online Support and Services Seagate Technology support servicesScope Standards Applicable standards and reference documentationElectromagnetic compatibility Electromagnetic susceptibilityEuropean Union Restriction of Hazardous Substances RoHS China Restriction of Hazardous Substances RoHS Directive Reference documentsGeneral description Media description Standard featuresPerformance ReliabilityFormatted capacities Programmable drive capacity Factory-installed optionsInternal drive characteristics Performance characteristicsAccess time Seek performanceGeneral performance characteristics Format command execution time minutesStart/stop time Prefetch/multi-segmented cache controlCache operation Prefetch operation Caching write dataError rates Reliability specificationsRecoverable Errors Unrecoverable ErrorsSeek errors Reliability and serviceInterface errors Preventive maintenance4 S.M.A.R.T Controlling S.M.A.R.TPerformance impact Determining rate Reporting controlPredictive failures Thermal monitorTemperature Log Page 0Dh State of the drive prior to testingDrive Self Test DST DST failure definitionShort and extended tests Invoking DSTShort test Function Code 001b Extended test Function Code 010bProduct warranty AbortStorage Physical/electrical specifications PowerChoiceTM power managementPowerChoice modes AC power requirements DC power requirements for ST9900805FC model 2Gb 4Gb Amps DC power requirementsDC power requirements for ST9600205FC model 2Gb 4Gb Amps DC power requirements for ST9450405FC model 2Gb 4Gb Amps DC power requirements for ST9300605FC model 2Gb 4Gb Amps General DC power requirement notes Power sequencingConducted noise immunity Current profiles Savvio 10K.5 FC Product Manual, Rev. D Savvio 10K.5 FC Product Manual, Rev. D Savvio 10K.5 FC Product Manual, Rev. D ST9900805FC Power dissipationST9600205FC ST9450405FC ST9300605FC Temperature a. Operating Environmental limitsRelative humidity Effective altitude sea level a. Operating Shock and vibrationShock Recommended mounting Air cleanliness Vibration a. Operating-normalAcoustics Corrosive environment Mounting configuration dimensions Mechanical specificationsDefect and error management Drive internal defects/errorsDrive error recovery procedures FC-AL system errors Background Media Scan Media Pre-ScanDeferred Auto-Reallocation Idle Read After Write Setting and determining the current Type LevelProtection Information PI Levels of PIIdentifying a Protection Information drive Drive ID/option selection InstallationDrive orientation CoolingAir flow Drive mountingGrounding Fibre Channel link service frames FC-AL featuresLink services supported Type of frame Interface requirementsFibre Channel task management functions Fibre Channel task management responsesFC Scsi FCP response codes Function name Response code NPort login Plogi payload Bytes Fibre Channel port loginFibre Channel Process Login Fibre Channel port login acceptNPort Login Accept ACC payload Bytes Process Login Plri payloadFibre Channel fabric login Fibre Channel Process Login AcceptProcess Login Accept ACC payload Bytes Fabric Login Flogi payload BytesFabric Login Accept ACC payload Bytes Fibre Channel fabric accept loginFibre Channel Arbitrated Loop options Dual port supportFC-AL options supported Option SupportedSupported commands Command code Command name Scsi commands supportedVerify error recovery page 07h Savvio 10K.5 FC Product Manual, Rev. D Temperature page 0Dh Mode Sense data Inquiry dataSavvio 10K.5 FC inquiry data Bytes Data hex Page Mode Data Header 00 00 00 00 45 dd 2f b0 00 00 00 00 00 00 02 00 00 00 00 34 65 f8 70 00 00 00 00 00 00 02 00 00 00 00 22 ec b2 5c 00 00 00 00 00 00 02 Supported Feature or condition Miscellaneous operating features and conditionsPhysical characteristics FC-AL physical interfacePhysical description Connector requirements Electrical descriptionPin descriptions FC-AL transmitters and receivers FC-SCA pin descriptions Pin Signal name Signal typeFault LED Out PowerEnable port bypass signals Active LED OutMotor start controls 10.5.11 SEL6 through SEL0 ID lines Parallel Enclosure Services Interface ESIAlpa SEL ID Signal characteristics 10.6.1 TTL input characteristicsDevice control codes LED driver signals FC Differential outputFC Differential input Receive eye diagram Eye diagram data values Link rate GHz Savvio 10K.5 FC Product Manual, Rev. D Index Devctrlcode Flogi Plogi Page Page Page Savvio 10K.5 FC Product Manual, Rev. D
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