Seagate ST318418N, ST318438LW Standard features, Media characteristics, Performance, Reliability

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Barracuda 36ES2 Product Manual, Rev. B

3.1Standard features

The Barracuda 36ES2 family has the following standard features:

Integrated Ultra160 SCSI controller

Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD)

16 bit I/O data bus on LW models. 8 bit I/O data bus on the N model.

Asynchronous and synchronous data transfer protocol

Firmware downloadable via SCSI interface

Selectable even-byte sector sizes from 512 to 4,096 bytes/sector

Programmable sector reallocation scheme

Flawed sector reallocation at format time

Programmable auto write and read reallocation

Reallocation of defects on command (post format)

Enhanced ECC maximum burst correction length of 240 bits with a guaranteed burst correction length of 233 bits.

Sealed head and disc assembly

No preventative maintenance or adjustment required

Dedicated head landing zone

Embedded servo design

Self diagnostics performed when power is applied to the drive

1:1 Interleave

Zoned bit recording (ZBR)

Vertical, horizontal, or top down mounting

Dynamic spindle brake

2,048 kbyte data buffer

Drive Self Test (DST)

3.2Media characteristics

The media used on the drive has a diameter of approximately 3.74 inches (95 mm). The aluminum substrate is coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection.

3.3Performance

Supports industry standard Ultra160 SCSI interface

Programmable multi-segmentable cache buffer (see Section 3.1)

7,200 RPM spindle. Average latency = 4.17 ms

Command queuing of up to 64 commands

Background processing of queue

Supports start and stop commands (spindle stops spinning)

3.4Reliability

800,000 hour MTBF

LSI circuitry

Balanced low mass rotary voice coil actuator

Incorporates industry-standard Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.)

3-year warranty

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Contents Product Manual, Volume Page Product Manual, Volume Page Revision status summary sheet Revision Date Writer/Engineer Sheets AffectedPage Contents Defect and error management InstallationSeagate Technology support services Interface requirementsList of Figures Barracuda 36ES2 Product Manual, Rev. B ViiPage Scope Barracuda 36ES2 family drive ST336938LW shownBarracuda 36ES2 Product Manual, Rev. B Applicable standards and reference documentation Korean MIC Australian C-TickTaiwanese Bsmi General description Standard features Media characteristicsPerformance ReliabilityOptions factory installed Factory installed accessoriesProgrammable drive capacity Performance characteristics Start/stop time Ultra2 Scsi Ultra160 ScsiPrefetch/multi-segmented cache control Cache operation Caching write dataPrefetch operation Barracuda 36ES2 Product Manual, Rev. B Reliability specifications Reliability and service Preventive maintenanceService life Service philosophy7 S.M.A.R.T Controlling S.M.A.R.TPerformance impact Reporting controlDetermining rate Predictive failuresState of the drive prior to testing DST Failure DefinitionImplementation Invoking DSTProduct warranty Short test Function Code 001bExtended test Function Code 010b Log page entriesProduct repair and return information Barracuda 36ES2 Product Manual, Rev. B AC power requirements Physical/electrical specificationsDC power requirements Conducted noise immunity Power sequencing3 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 Temperature Environmental limitsBarracuda 36ES2 Product Manual, Rev. B Relative humidity Effective altitude sea levelShock and vibration ShockRecommended mounting Barracuda 36ES2 Product Manual, Rev. B Vibration Air cleanlinessAcoustics Mechanical specifications Dimension TableMounting configuration dimensions Barracuda 36ES2 Product Manual, Rev. B Drive error recovery procedures Defect and error managementDrive internal defects Scsi systems errors Installation Configure drive optionsFormatting Drive ID/option select headerDo 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 Cooling Drive orientationAir flow Barracuda 36ES2 Product Manual, Rev. B Drive mounting GroundingBarracuda 36ES2 Product Manual, Rev. B Interface requirements Scsi interface messages supportedScsi interface commands supported Commands supported by Barracuda 36ES2 family drives Barracuda 36ES2 Product Manual, Rev. B Vendor ID Inquiry Vital Product data Unit serial number page 80hImplemented operating definition page 81h Firmware numbers page C0hJumper settings page C2h Mode Sense data DEF CHG Barracuda 36ES2 Product Manual, Rev. B Condition/features supported Supported Status supported 2 REQ/ACK offset DC cable and connectorPhysical interface Model drive physical interface 50-pin Scsi I/O connector Pin Power Scsi interface physical description Scsi interface cable requirementsBarracuda 36ES2 Product Manual, Rev. B Mating connectors Mating connectors for N model drivesScsi 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 Electrical description Multimode signalsMultimode-SE and LVD alternatives Input characteristics LVD output signalsTransmitter characteristics Receiver characteristicsSingle-ended drivers/receivers for N models Single-ended drivers/receivers for LW modelsGeneral cable characteristics Low voltage differential I/O circuitsTerminator requirements Terminator power DrivesLW drives Page Drive activity LED Following table provides drive activity LED statusSeagate Technology support services Online Services Automated ServicesPresales Support Technical SupportUSA/Canada/Latin America Support Services Customer Service CSOEuropean Support Services Asia/Pacific Support Services Africa/Middle East 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