Seagate ST373405LW/LWV/LC/LCV manual Cheetah 73LP Product Manual, Rev. E Environmental limits

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Cheetah 73LP Product Manual, Rev. E

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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 82°F (28°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 temperatures are not exceeded. Air flow may be needed to achieve these temperature values (see Section 8.3). Operation at temperatures above these values may adversely affect the drives ability to meet specifications.

The MTBF specification for the drive is based on operating in an environment that ensures that the case temperatures are not exceeded. Occasional excursions to drive ambient temperatures of 131°F (55°C) or 41°F (5°C) may occur without impact to the specified MTBF. Air flow may be needed to achieve these tem- peratures. Continual or sustained operation at case temperatures above these values may degrade MTBF. The maximum allowable continuous or sustained HDA case temperature for the rated MTBF is 122°F (50°C).

To confirm that the required cooling for the HDA 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.

The maximum allowable HDA case temperature is 140°F (60°C). Operation of the drive at the maximum case temperature is intended for short time periods only. Continuous operation at the elevated temperatures will reduce product reliability.

b.Non-operating

–40° to 158°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 Temp.

Check Point

.5"

2.0"

Figure 11. Location of the HDA Temperature check point

6.4.2Relative humidity

The values below assume that no condensation on the drive occurs.

a.Operating

5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour.

b.Non-operating

5% to 95% non-condensing relative humidity.

6.4.3Effective altitude (sea level)

a.Operating

–1,000 to +10,000 feet (–305 to +3,048 meters)

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Contents ST373405LW/LWV/LC/LCV ST336605LW/LC/LCV Page ST373405LW/LWV/LC/LCV ST336605LW/LC/LCV Page Revision Date Writer/Engineer Sheets Affected Revision status summary sheetPage Contents Installation Defect and error managementSeagate Technology support services Interface requirementsCheetah 73LP Product Manual, Rev. E Vii List of FiguresPage Cheetah 73LP family drive ST373405LW shown ScopeCheetah 73LP Product Manual, Rev. E Applicable standards and reference documentation Korean MIC Australian C-TickTaiwanese Bsmi General description Cheetah 73LP family drive Media characteristics Cheetah 73LP Product Manual, Rev. E Standard featuresPerformance ReliabilityOptions factory installed Factory installed accessoriesAccessories user installed Unformatted and formatted capacitiesPerformance characteristics Start/stop time Ultra2 Scsi Ultra3 ScsiPrefetch/multi-segmented cache control Caching write data Cheetah 73LP Product Manual, Rev. E Cache operationPrefetch operation Reliability specifications Preventive maintenance Reliability and serviceService life Service philosophyControlling S.M.A.R.T 7 S.M.A.R.TMilliseconds Performance impactReporting control Determining rateDST Failure Definition State of the drive prior to testingImplementation Invoking DSTShort test Function Code 001b Short and extended testsExtended test Function Code 010b Log page entriesShipping Cheetah 73LP Product Manual, Rev. E Product warrantyProduct repair and return information Cheetah 73LP Product Manual, Rev. E AC power requirements Physical/electrical specificationsDC power requirements Conducted noise immunity Power sequencing3 12 V Current profile Typical ST336605 drive +12 V current profile Typical ST336605 drive +5 V current profile Amperes 000 900 800 700 600 Cheetah 73LP Product Manual, Rev. E Environmental limits TemperatureRelative humidity Effective altitude sea levelShock Shock and vibrationRecommended mounting Vibration Air cleanlinessAcoustics LW and LWV mounting configuration dimensions LC and LCV mounting configuration dimensions Drive error recovery procedures Defect and error managementDrive internal defects Scsi systems errors Configure drive options InstallationFormatting Drive ID/option select headerDo not install jumpers retain cover J5 jumper header on LW/LWV models only J2 option select header Does not apply to LC/LCV model Cheetah 73LP Product Manual, Rev. E Function descriptionCooling Drive orientationGrounding Cheetah 73LP Product Manual, Rev. E Drive mountingCheetah 73LP Product Manual, Rev. E Scsi interface messages supported Interface requirementsScsi interface commands supported Cheetah 73LP Product Manual, Rev. E Cheetah 73LP Product Manual, Rev. E Inquiry Vital Product data Mode Sense data DEF CHG Cheetah 73LP Product Manual, Rev. E Condition/feature supported by 2 REQ/ACK offset DC cable and connectorPhysical interface Pin Power Scsi interface cable requirements Scsi interface physical descriptionMating connectors for LW and LWV model drives Mating connectorsMating connectors for LC and LCV model drives ST373405LC/LCV and ST336605LC/LCVCheetah 73LP Product Manual, Rev. E Scsi ID Right-angle to Pcba connectors650±.005 155 100 346 Front View GND +DBP1 62Cheetah 73LP Product Manual, Rev. E REQ +REQ Electrical description LVD output characteristicsMultimode-SE and LVD alternatives Single-ended drivers/receivers General cable characteristicsTerminator requirements Cables for low voltage differential drivers/receiversLC and LCV drives Disc drive Scsi timing Drive activity LED Spindle status Command status LED statusCheetah 73LP Product Manual, Rev. E Automated Services Seagate Technology support services Online 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 Cheetah 73LP Product Manual, Rev. E Index Cheetah 73LP Product Manual, Rev. E Cheetah 73LP Product Manual, Rev. E Scam Scsi Scsi ID 80Cheetah 73LP Product Manual, Rev. E
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