Seagate ST336607LW, 100516226 manual Preventive maintenance, Hot plugging the drive, 4 S.M.A.R.T

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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 environments:

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 hazard, 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.

5.2.4S.M.A.R.T.

S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended to recognize conditions that indicate imminent drive failure and is designed to provide sufficient warning of a failure to allow you to back up the data before an actual failure occurs.

Note. The drive’s firmware monitors specific attributes for degradation over time but can’t predict instantaneous drive failures.

Each monitored attribute has been selected to monitor a specific set of failure conditions in the operating performance of the drive and the thresholds are optimized to minimize “false” and “failed” predictions.

Controlling S.M.A.R.T.

The operating mode of S.M.A.R.T. is controlled by the DEXCPT and PERF bits on the Informational Exceptions Control mode page (1Ch). Use the DEXCPT bit to enable or disable the S.M.A.R.T. feature. Setting the DEXCPT bit disables all S.M.A.R.T. functions. When enabled, S.M.A.R.T. collects on-line data as the drive performs normal read and write operations. When the PERF bit is set, the drive is considered to be in “On-line Mode Only” and will not perform off-line functions.

You can measure off-line attributes and force the drive to save the data by using the Rezero Unit command. Forcing S.M.A.R.T. resets the timer so that the next scheduled interrupt is in two hours.

You can interrogate the drive through the host to determine the time remaining before the next scheduled measurement and data logging process occurs. To accomplish this, issue a Log Sense command to log page 0x3E. This allows you to control when S.M.A.R.T. interruptions occur. Forcing S.M.A.R.T. with the RTZ command resets the timer.

CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F

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Contents Standard models Self-Encrypting Drive models SED Fips 140-2 modelsPage Contents About Fips About SELF-ENCRYPTING Drives Defect and Error ManagementInstallation Interface RequirementsCheetah 15K.7 SAS Product MANUAL, REV. F III Seagate Technology Support Services Scope Fips 140-2 L EvelSED STANDARDS, Compliance and Reference Documents StandardsCompliance Taiwanese Bsmi Australian C-TickKorean KCC European Union Restriction of Hazardous Substances RohsGeneral Description Standard Features Media DescriptionPerformance Formatted Capacities FACTORY-INSTALLED OptionsReliability ST3600057SS ST3450857SS ST3300657FCAccess time Performance CharacteristicsInternal Drive Characteristics Format command execution time minutesGeneral performance characteristics START/STOP TimePREFETCH/MULTI-SEGMENTED Cache Control Cache Operation Caching write data Prefetch operationReliability Specifications Error RatesReliability and Service 4 S.M.A.R.T Preventive maintenanceHot plugging the drive Controlling S.M.A.R.TReporting control Performance impactMilliseconds Determining rateDrive Self Test DST Temperature Log Page 0DhParameter Code Description DST failure definitionInvoking DST State of the drive prior to testingImplementation Short and extended testsAbort Product warrantyLog page entries ShippingDC Power Requirements PHYSICAL/ELECTRICAL SpecificationsAC Power Requirements 600 GB DC power requirements450 GB DC power requirements 300 GB DC power requirements Power sequencing Conducted noise immunityCurrent profiles Typical 450GB current profiles Power Dissipation Temperature a. Operating 300GB modelEnvironmental Limits Relative humidity Effective altitude sea level a. OperatingShock and vibration ShockVibration Recommended mountingCorrosive environment Air cleanlinessAcoustics RoHS compliance statementMechanical Specifications Units of Measure mm inchesPurpose Validation ProgramSeagate Enterprise SED Data Encryption Controlled AccessAbout SELF-ENCRYPTING Drives Random Number Generator RNGSupported Commands Authenticated Firmware DownloadPower Requirements Drive LockingDefect and Error Management Drive Internal DEFECTS/ERRORSDrive Error Recovery Procedures SAS System Errors Read and write retry count maximum recovery timesDeferred AUTO-REALLOCATION Background Media ScanMedia PRE-SCAN Idle Read After WriteInstallation Drive OrientationCooling Drive Mounting GroundingTask management functions SAS FeaturesInterface Requirements Task management responsesScsi Commands Supported Commands supported by Cheetah 15K.7 SAS family drivesCommands supported by Cheetah 15K.7 SAS family drives Commands supported by Cheetah 15K.7 SAS family drives Mode Sense data Inquiry dataCheetah 15K.7 inquiry data Cheetah 15K.7 SAS Product MANUAL, REV. F 11.3.2.1 600GBmodel Mode Sense data 11.3.2.2 450GB model Mode Sense data 11.3.2.3 300GB model Mode Sense data Miscellaneous features Miscellaneous Operating Features and ConditionsSupported Feature or condition SAS physical interfaceDatum B This Area Electrical description Physical characteristicsConnector requirements Pin descriptionsSAS transmitters and receivers PowerSignal Characteristics Ready LED OutBPS Differential signalsSAS-2 Specification Compliance Additional InformationIndex Page SAS See also cooling Seagate Technology LLC Americas
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