Seagate ST3146855LC, ST3146855LW Terminator requirements Terminator power, LW drives, LC drives

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10.8Terminator requirements

Caution: These drives do not have onboard internal terminators. The user, systems integrator or host equip- ment manufacturer must provide a terminator arrangement external to the drive when termination is required. For LW drives, terminator modules can be purchased that plug between the SCSI I/O cable and the drive I/O connector or on the end of a short I/O cable stub extending past the last cable connector. LC drives are designed to be plugged into a backpanel connector without cabling.

10.9Terminator power

LW drives

You can configure terminator power from the drive to the SCSI bus or have the host adaptor or other device supply terminator power to the external terminator. See Section 9.1 for illustrations that show how to place jumpers for this configuration.

LC drives

These drives cannot furnish terminator power because no conductors in the 80-pin I/O connector are devoted to terminator power.

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Contents Cheetah 15K.5 Scsi Page Contents Interface requirements Defect and error managementInstallation List of Figures Page Seagate Online Support and Services Seagate Technology support servicesScope Standards Applicable standards and reference documentationElectromagnetic compatibility Electromagnetic susceptibilityEuropean Union Restriction of Hazardous Substances RoHS Electromagnetic complianceReference documents General description Drive model number vs. differentiating featuresMedia characteristics Standard featuresFormatted capacities PerformanceReliability Options factory installed Factory installed accessoriesAccessories Programmable drive capacityScsi performance characteristics visible to user Performance characteristicsInternal drive characteristics transparent to user Seek time Format command execution time minutesGeneralized performance characteristics Cache operation Start/stop timePrefetch/multi-segmented cache control Prefetch operation Caching write dataError rates Reliability specificationsRecoverable Errors Unrecoverable ErrorPreventive maintenance Reliability and serviceSeek errors 4 S.M.A.R.T Hot plugging Cheetah 15K.5 Scsi disc drivesPerformance impact Controlling S.M.A.R.TMilliseconds Reporting controlDrive Self Test DST Temperature Log page 0Dh Parameter Code DescriptionThermal monitor DST Failure Definition State of the drive prior to testingImplementation Invoking DSTShort test Function Code 001b Product warrantyExtended test Function Code 010b Log page entriesProduct repair and return information ShippingAC power requirements Physical/electrical specificationsDC power requirements ST3300655LC DC power requirementsST373455LC DC power requirements ST3146855LC DC power requirementsCurrent profile Power sequencingConducted noise immunity Typical ST3300655LW drive +12V LVD current profile ST3300655LW/ST3300655LC Power dissipationST3146855LW/ST3146855LC ST3146855LC DC current and power vs. Iops LVDST373455LW/ST373455LC ST373455LC DC current and power vs. Iops LVDEnvironmental limits Temperature a. OperatingRelative humidity Effective altitude sea level a. OperatingShock Shock and vibrationRecommended mounting Corrosive environment Air cleanlinessVibration a. Operating-normal Acoustics Mechanical specificationsLC mounting configuration dimensions Drive internal defects Defect and error managementDrive error recovery procedures Read and write retry count maximum recovery times Media Pre-Scan Scsi systems errorsBackground Media Scan Idle Read After Write Deferred Auto-ReallocationConfigure drive options InstallationDrive ID/option select header FormattingJ5 jumper header on LW models only Drive Front RES Function descriptionCooling Drive orientationGrounding Drive mountingGeneral description Interface requirementsScsi interface messages supported Scsi messages supported by Cheetah 15K.5 Scsi family drivesCommands supported by Cheetah 15K.5 Scsi family drive Scsi interface commands supportedCommands supported by Cheetah 15K.5 Scsi family drive Commands supported by Cheetah 15K.5 Scsi family drive Commands supported by Cheetah 15K.5 Scsi family drive Inquiry Vital Product data Cheetah 15K.5 Scsi family drive Standard Inquiry dataMode Sense data Mode Sense Pages Data ST3300655 Mode sense dataMode Sense Header Data Mode Sense Pages Data ST3146855 Mode sense dataST373455 Mode sense data Scsi bus conditions and other miscellaneous features Scsi bus conditions and miscellaneous features supportedPhysical interface Synchronous data transferDC cable and connector Scsi interface physical description Interface transfer rates supported Mating connectorsScsi interface cable requirements Cable requirementsMating connectors for LC model drives Mating connectors for LW model drivesScsi daisy-chain interface cabling for LW drives Right-angle to Pcba connectorsNonshielded 68-pin Scsi device connector used on LW drives Nonshielded 80-pin Scsi SCA-2 connector used on LC drives GND LW 68-conductor LVD P cable signal/pin assignments Active LED OUT 4 LC 80-pin single-ended SE I/O connector pin assignments+5 V Charge GND Active LED OUT 4 LC 80-pin single-ended LVD I/O connector pin assignmentsMultimode-SE and LVD alternatives LVD output characteristicsElectrical description General cable characteristics LVD Input characteristicsCable characteristics for single-ended circuits Single-ended drivers/receiversTwist-n-flat cables-into a multi-drive backplane Cables for low voltage differential drivers/receiversLC drives Terminator requirements Terminator powerLW drives Disc drive Scsi timing Disc drive Scsi timingDisc drive Scsi timing Drive activity LED Drive activity LED status Spindle status Command statusNumerics SymbolsPage Page Scsi Page Page