Seagate ST400FX0002 Drive Self Test DST, DST failure definition, Implementation, Invoking DST

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6.3.6Drive Self Test (DST)

Drive Self Test (DST) is a technology designed to recognize drive fault conditions that qualify the drive as a failed unit. DST validates the functionality of the drive at a system level.

There are two test coverage options implemented in DST:

1.Extended test

2.Short test

The most thorough option is the extended test that performs various tests on the drive and scans every logical block address (LBA) of the drive. The short test is time-restricted and limited in length—it does not scan the entire media contents, but does some fundamental tests and scans portions of the media.

If DST encounters an error during either of these tests, it reports a "diagnostic failed" condition. If the drive fails the test, remove it from service and return it to Seagate for service.

6.3.6.1DST failure definition

The drive will present a “diagnostic failed” condition through the self-tests results value of the diagnostic log page if a functional failure is encountered during DST. The drive parameters are not modified to test the drive more stringently, and the recovery capabilities are not reduced. All retries and recovery processes are enabled during the test. If data is recoverable, no failure condition will be reported regardless of the recovery processes required to recover the data.

The following conditions are considered DST failure conditions:

•Read error after recovery attempts are exhausted

•Write error after recovery attempts are exhausted

Recovered errors will not be reported as diagnostic failures.

6.3.6.2Implementation

This section provides all of the information necessary to implement the DST function on this drive.

6.3.6.2.1State of the drive prior to testing

The drive must be in a ready state before issuing the SEND DIAGNOSTIC command. There are multiple rea- sons why a drive may not be ready, some of which are valid conditions, and not errors. For example, a drive may be in process of doing a FORMAT UNIT, or another DST. It is the responsibility of the host application to determine the “not ready” cause.

6.3.6.2.2Invoking DST

To invoke DST, submit the SEND DIAGNOSTIC command with the appropriate Function Code (001b for the short test or 010b for the extended test) in bytes 1, bits 5, 6, and 7.

Pulsar XT.2 SAS Product Manual, Rev. B

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Contents Standard Models Self-Encrypting Drive Models ST400FX0002ST400FX0012 ST200FX0002 ST100FX0002Revision history Contents About self-encrypting drives Physical/electrical specificationsDefect and error management InstallationPage Pulsar XT.2 SAS Product Manual, Rev. B 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-TickChina Restriction of Hazardous Substances RoHS Directive Reference documentsGeneral description Standard featuresMedia description PerformanceReliability Factory-installed options Formatted capacitiesProgrammable drive capacity Thin Provisioning Drive Configuration Access time Performance characteristicsInternal drive characteristics Performance characteristicsPerformance Format Mode Dcrt Bit IP Bit 400GB 200GB 100GBStart/stop time Cache controlCaching write data Error rates Reliability specificationsEndurance Management Lifetime Endurance Management Reliability and servicePreventive maintenance Data RetentionPerformance impact Maximum processing delay Fully-enabled delay4 S.M.A.R.T Controlling S.M.A.R.TThermal monitor Predictive failuresImplementation 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 informationPhysical/electrical specifications Power specificationsAC power requirements 400GB standard model DC power requirements DC power requirements200GB standard model DC power requirements 100GB standard model DC power requirements Current profiles General DC power requirement notesPower sequencing Conducted noise immunityCurrent profiles for 200GB models Power dissipation 400GB models in 6Gb operation200GB models in 6Gb operation Temperature a. Operating Environmental limits100GB models in 6Gb operation Relative humidity Effective altitude sea level a. OperatingShock and vibration Recommended mounting ShockAir cleanliness Vibration a. Operating-normalCorrosive environment Mounting configuration dimensions 400GB models Mechanical specificationsWeight Pounds 100 grams Data encryption Controlled accessAdmin SP About self-encrypting drivesData bands Default passwordRandom number generator RNG Drive lockingCryptographic erase Authenticated firmware downloadPower requirements Supported commandsDefect and error management Drive internal defects/errorsSSD Physical format address descriptor Bit Byte Auto-Reallocation Drive error recovery proceduresSAS system errors Background Media ScanIdentifying 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 Supported commands Scsi commands supportedPersistent Reserve Read Capacity Write Inquiry data Mode Sense dataPage 14 1a 00 1a Mode Sense data for 400GB drivesMode Pages Mode Sense data for 200GB drivesMode Sense values for 100GB drives SAS physical interface Miscellaneous operating features and conditionsMiscellaneous features Miscellaneous statusDatum 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 RNG See also cooling Page Americas Seagate Technology LLC
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