Seagate ST318418N, ST318438LW, ST336938LW, ST336918N manual Environmental limits, Temperature

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Barracuda 36ES2 Product Manual, Rev. B

6.4Environmental limits

Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F (14.8°C). Maximum wet bulb temperature is 86°F (30°C).

6.4.1Temperature

a.Operating

With cooling designed to maintain the case temperature, the drive meets all specifications over a 41°F to 131°F (5°C to 55°C) drive ambient temperature range with a maximum temperature gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed such that the temperature at the location specified in Note [3] is not exceeded. Air flow may be needed to achieve these temperature values (see Note [1]). Operation at case temperatures above these values may adversely affect the drives ability to meet specifi- cations.

The MTBF specification for the drive is based on operating in an environment that ensures that the case temperature is not exceeded. Occasional excursions to drive ambient temperatures of 131°F (55°C) or 41°F (5°C) may occur without impact to specified MTBF. Air flow may be needed to achieve these tempera- tures (see Note [1]). The maximum allowable continuous or sustained temperature for rated MTBF is 113°F (45°C).

To confirm that the required cooling for the drive is provided, place the drive in its final mechanical configu- ration, perform random write/read operations. After the temperatures stabilize, measure the case tempera- ture of the HDA (see Note [3]).

The maximum allowable HDA case temperature is 50°C. Operation of the drive at the maximum case tem- perature is intended for short time periods only. Continuous operation at the elevated temperatures will reduce product reliability.

Notes.

[1]Section 8.2.1 describes the air-flow patterns to be used to meet HDA temperature. Air flow was oppo- site that shown in Section 8.2.1. Air velocity should be adequate to ensure that the HDA temperature is not exceeded during drive operation.

[2]The temperatures in columns 1 and 2 are calculated and may not reflect actual operating values. Suf- ficient cooling is required to ensure that these values are not exceeded.

[3]Measure HDA temp at point labeled “HDA Temp. Check Point” on Figure 6.

b.Non-operating

–40° to 163°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive.

HDA Temperature

Check Point

.5"

2

 

.

 

0"

Figure 6. Location of HDA Temperature Check Point

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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 Australian C-Tick Korean MICTaiwanese Bsmi General description Standard features Media characteristicsPerformance ReliabilityFactory installed accessories Options factory installedProgrammable drive capacity Performance characteristics Ultra2 Scsi Ultra160 Scsi Start/stop timePrefetch/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 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 Temperature Environmental limitsBarracuda 36ES2 Product Manual, Rev. B Relative humidity Effective altitude sea levelShock and vibration ShockRecommended mounting Air cleanliness Barracuda 36ES2 Product Manual, Rev. B VibrationAcoustics Mechanical specifications Dimension TableMounting configuration dimensions Barracuda 36ES2 Product Manual, Rev. B Defect and error management Drive error recovery proceduresDrive 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 Drive orientation CoolingAir 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 DC cable and connector 2 REQ/ACK offsetPhysical 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 Multimode signals Electrical descriptionMultimode-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 power Drives Terminator requirementsLW drives Page Drive activity LED Following table provides drive activity LED statusSeagate Technology support services Online Services Automated ServicesPresales Support Technical 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