Seagate ST3600857SS, ST3300457SS, ST3450657SS manual Drive mounting, Grounding

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If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 11. The air-flow pat- terns are created by one or more fans, either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced air-flow patterns are acceptable as long as the temperature measurement guide- lines of Section 7.4.1 are met.

Note. Air flows in the direction shown (back to front) or in reverse direction (front to back)

Above unit

Under unit

Note. Air flows in the direction shown or in reverse direction (side to side)

Figure 11. Air flow

Above unit

Under unit

11.3Drive mounting

Mount the drive using the bottom or side mounting holes. If you mount the drive using the bottom holes, ensure that you do not physically distort the drive by attempting to mount it on a stiff, non-flat surface.

The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm). The following equation and paragraph define the allowable mounting surface stiffness:

K x X = F < 15lb = 67N

where K is the mounting surface stiffness (units in lb/in or N/mm) and X is the out-of-plane surface distortion (units in inches or millimeters). The out-of-plane distortion (X) is determined by defining a plane with three of the four mounting points fixed and evaluating the out-of-plane deflection of the fourth mounting point when a known force (F) is applied to the fourth point.

11.4Grounding

Signal ground (PCBA) and HDA ground are connected together in the drive and cannot be separated by the user. The equipment in which the drive is mounted is connected directly to the HDA and PCBA with no electri- cally isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCBA ground, the systems integrator or user must provide a nonconductive (electrically isolating) method of mount- ing the drive in the host equipment.

Increased radiated emissions may result if you do not provide the maximum surface area ground connection between system ground and drive ground. This is the system designer’s and integrator’s responsibility.

44	Cheetah 15K.7 SAS Product Manual, Rev. D

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Contents ST3300457SS ST3600857SSST3450657SS Standard models Self-Encrypting Drive modelsPage Contents About Fips About self-encrypting drives Defect and error managementInstallation Interface requirementsPower Cheetah 15K.7 SAS Product Manual, Rev. D Seagate Technology support services Seagate Online Support and ServicesScope Electromagnetic compatibility Standards, compliance and reference documentsStandards Electromagnetic susceptibilityCompliance European Union Restriction of Hazardous Substances RoHSReference documents General description Performance Standard featuresMedia description Formatted capacities Factory-installed optionsReliability Programmable drive capacityAccess time Performance characteristicsInternal drive characteristics Seek timeStart/stop time Format command execution time minutesGeneral performance characteristics Prefetch/multi-segmented cache control Cache operationCaching write data Prefetch operationRecoverable Errors Reliability specificationsError rates Unrecoverable ErrorsInterface errors Reliability and serviceSeek errors Preventive maintenancePerformance impact 4 S.M.A.R.TControlling S.M.A.R.T MillisecondsPredictive failures Reporting controlDetermining rate Thermal monitorDrive Self Test DST Temperature Log Page 0Dh Parameter Code DescriptionState of the drive prior to testing DST failure definitionShort test Function Code 001b Invoking DSTShort and extended tests Extended test Function Code 010bShipping Product warrantyAbort Product repair and return informationDC power requirements Physical/electrical specificationsAC power requirements 600 GB DC power requirements Gbit mode Amps450 GB DC power requirements 300 GB DC power requirements Current profiles Power sequencingConducted noise immunity Typical 600GB current profiles Typical 300GB current profiles Power dissipation 450GB model Temperature a. Operating Environmental limitsShock and vibration Relative humidityEffective altitude sea level a. Operating ShockPackage size Packaged/product weight Drop height Vibration a. Operating-normal Recommended mountingCorrosive environment Air cleanlinessAcoustics RoHS compliance statementMechanical specifications Units of Measure mm inchesLevel 2 security About FipsPurpose About self-encrypting drives Controlled accessAdmin SP Data encryptionDrive locking Authenticated firmware downloadRandom number generator RNG Data bandsPower requirements Supported commandsDrive error recovery procedures Defect and error managementDrive internal defects/errors Page SAS system errors Background Media ScanIdle Read After Write Media Pre-ScanDeferred Auto-Reallocation Cooling InstallationDrive orientation Drive mounting GroundingSAS features Interface requirementsDual port support Scsi commands supportedCommands supported by Cheetah 15K.6 SAS family drives Commands supported by Cheetah 15K.6 SAS family drives Commands supported by Cheetah 15K.6 SAS family drives Commands supported by Cheetah 15K.6 SAS family drives Inquiry data Cheetah 15K.7 inquiry data Bytes Data hexMode Sense data 12.3.2.1 600GBmodel Mode Sense data Mode PagesDEF CHG 12.3.2.2 450GB model Mode Sense data Mode Data Header Block Descriptor Mode PagesDEF CHG Read Capacity Data Buffer C D E F 12.3.2.3 300GB model Mode Sense data Mode PagesMiscellaneous operating features and conditions Miscellaneous featuresMiscellaneous status SAS physical interfaceDatum B Physical characteristics Connector requirementsSAS pin descriptions Electrical descriptionPin descriptions SAS transmitters and receivers Signal characteristicsPower Ready LED OutDifferential signals SAS-2 Specification complianceLED drive signal General interface characteristicsCheetah 15K.7 SAS Product Manual, Rev. D Index NumericsPage SAS Smart

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