Seagate ST336918N DST Failure Definition, Implementation, State of the drive prior to testing

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Barracuda 36ES2 Product Manual, Rev. B

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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 surface, but does some fundamental tests and scans portions of the media.

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

5.2.8.1DST 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 channel and servo parameters are not modified to test the drive more stringently, and the number of retries 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 number of retries required to recover the data.

The following conditions are considered DST failure conditions:

•Seek error after retries are exhausted

•Track-follow error after retries are exhausted

•Read error after retries are exhausted

•Write error after retries are exhausted

Recovered errors will not be reported as diagnostic failures.

5.2.8.2Implementation

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

5.2.8.2.1State of the drive prior to testing

The drive must be in a ready state before issuing the Send Diagnostic command. There are multiple reasons 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, or another DST. It is the responsibility of the host application to determine the “not ready” cause.

While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a failed drive.

A Drive Not Ready condition is reported by the drive under the following conditions:

•Motor will not spin

•Motor will not lock to speed

•Servo will not lock on track

•Drive cannot read configuration tables from the disc

In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code.

5.2.8.2.2Invoking 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. Refer to the SCSI Interface Product Manual, part number 75789509, for additional information about invoking DST.

5.2.8.2.3Short and extended tests

The short and extended test options are described in the following two subsections.

Each test consists of three segments: an electrical test segment, a servo test segment, and a read/verify scan segment.

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Contents Product Manual, Volume Page Product Manual, Volume Page Revision Date Writer/Engineer Sheets Affected Revision status summary sheetPage Contents Interface requirements Defect and error managementInstallation Seagate Technology support servicesBarracuda 36ES2 Product Manual, Rev. B Vii List of FiguresPage Barracuda 36ES2 family drive ST336938LW shown ScopeBarracuda 36ES2 Product Manual, Rev. B Applicable standards and reference documentation Australian C-Tick Korean MICTaiwanese Bsmi General description Reliability Standard featuresMedia characteristics PerformanceFactory installed accessories Options factory installedProgrammable drive capacity Performance characteristics Ultra2 Scsi Ultra160 Scsi Start/stop timePrefetch/multi-segmented cache control Caching write data Cache operationPrefetch operation Barracuda 36ES2 Product Manual, Rev. B Reliability specifications Service philosophy Reliability and servicePreventive maintenance Service lifeControlling S.M.A.R.T 7 S.M.A.R.TPredictive failures Performance impactReporting control Determining rateInvoking DST State of the drive prior to testingDST Failure Definition ImplementationLog page entries Product warrantyShort test Function Code 001b Extended test Function Code 010bProduct repair and return information Barracuda 36ES2 Product Manual, Rev. B Physical/electrical specifications AC power requirementsDC power requirements Power sequencing Conducted noise immunity3 12 V Current profile +5 Volt Current during spindle start Typical Amper es Amps Power dissipation ST336938/ST318438 Barracuda 36ES2 Product Manual, Rev. B ST336918/ST318418 Environmental limits TemperatureShock Barracuda 36ES2 Product Manual, Rev. B Relative humidityEffective altitude sea level Shock and vibrationRecommended mounting Air cleanliness Barracuda 36ES2 Product Manual, Rev. B VibrationAcoustics Dimension Table Mechanical specificationsMounting configuration dimensions Barracuda 36ES2 Product Manual, Rev. B Defect and error management Drive error recovery proceduresDrive internal defects Scsi systems errors Drive ID/option select header InstallationConfigure drive options FormattingDo not install jumpers retain cover J6 jumper header for N model J5 jumper header on LW models only J2 option select header for LW models Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Function description Drive orientation CoolingAir flow Grounding Barracuda 36ES2 Product Manual, Rev. B Drive mountingBarracuda 36ES2 Product Manual, Rev. B Scsi interface messages supported Interface requirementsScsi interface commands supported Commands supported by Barracuda 36ES2 family drives Barracuda 36ES2 Product Manual, Rev. B Vendor ID Firmware numbers page C0h Inquiry Vital Product dataUnit serial number page 80h Implemented operating definition page 81hJumper settings page C2h Mode Sense data DEF CHG Barracuda 36ES2 Product Manual, Rev. B Condition/features supported Supported Status supported DC cable and connector 2 REQ/ACK offsetPhysical interface Model drive physical interface 50-pin Scsi I/O connector Pin Power Scsi interface cable requirements Scsi interface physical descriptionMating connectors for N model drives Barracuda 36ES2 Product Manual, Rev. B Mating connectorsScsi daisy chain interface cabling for N drives Nonshielded 68 pin Scsi device connector used on LW drives Scsi daisy chain interface cabling for LW drives GND GND DBP1 +DBP1 Multimode signals Electrical descriptionMultimode-SE and LVD alternatives LVD output signals Input characteristicsSingle-ended drivers/receivers for LW models Transmitter characteristicsReceiver characteristics Single-ended drivers/receivers for N modelsLow voltage differential I/O circuits General cable characteristicsTerminator power Drives Terminator requirementsLW drives Page Following table provides drive activity LED status Drive activity LEDTechnical Support Seagate Technology support services Online ServicesAutomated Services Presales SupportCustomer Service CSO USA/Canada/Latin America Support ServicesEuropean Support Services Africa/Middle East Support Services Asia/Pacific Support ServicesCall Center Toll-free Direct dial Barracuda 36ES2 Product Manual, Rev. B Index Diffsens LED PCB System chassis Barracuda 36ES2 Product Manual, Rev. B
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