Seagate ST3300657SS, ST3300557SS, ST3450857SS, ST3450757SS, ST3600957SS Drive mounting, Grounding

Page 48

If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 10. 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 6.4.1 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 10. Air flow

Above unit

Under unit

9.3Drive 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.

9.4Grounding

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.

42	Cheetah 15K.7 SAS Product Manual, Rev. A

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Contents Cheetah 15K.7 SAS Standard models Self-Encrypting Drive modelsPage Contents Defect and error management InstallationAbout self-encrypting drives Interface requirementsSeagate Technology support services Cheetah 15K.7 SAS Product Manual, Rev. a Scope Model Number Capacity Self-Encrypting Drive SEDStandards, compliance and reference documents StandardsElectromagnetic compatibility Electromagnetic susceptibilityCompliance European Union Restriction of Hazardous Substances RoHSReference documents General description Standard features Media descriptionPerformance Factory-installed options ReliabilityFormatted capacities Programmable drive capacityPerformance characteristics Internal drive characteristicsAccess time Seek timeFormat command execution time minutes General performance characteristicsStart/stop time Prefetch/multi-segmented cache control Cache operationCaching write data Prefetch operationReliability specifications Error ratesRecoverable Errors Unrecoverable ErrorsReliability and service Seek errorsInterface errors Preventive maintenance4 S.M.A.R.T Controlling S.M.A.R.TPerformance impact MillisecondsReporting control Determining ratePredictive failures Thermal monitorTemperature Log Page 0Dh Parameter Code Description State of the drive prior to testingDrive Self Test DST DST failure definitionInvoking DST Short and extended testsShort test Function Code 001b Extended test Function Code 010bProduct warranty AbortShipping Product repair and return informationPhysical/electrical specifications AC power requirementsDC power requirements 600 GB DC power requirements ST3600057SS ST3600957SS Gbit mode Amps450 GB DC power requirements ST3450857SS ST3450757SS Gbit mode Amps300 GB DC power requirements ST3300657SS ST3300557SS Gbit mode AmpsPower sequencing Conducted noise immunityCurrent profiles Typical 600GB current profiles Typical 300GB current profiles Power dissipation ST3600057SS modelST3450857SS model Temperature Environmental limitsST3300657SS model Relative humidity Effective altitude sea levelShock and vibration ShockPackage size Packaged/product weight Drop height Vibration Recommended mountingAir cleanliness AcousticsCorrosive environment RoHS compliance statementMechanical specifications Physical dimensionsControlled access Admin SPAbout self-encrypting drives Data encryptionAuthenticated firmware download Random number generator RNGDrive locking Data bandsPower requirements Supported commandsDefect and error management Drive internal defects/errorsDrive error recovery procedures Page SAS system errors Background Media ScanMedia Pre-Scan Deferred Auto-ReallocationIdle Read After Write Installation Drive orientationCooling Drive mounting GroundingSAS features Interface requirementsScsi commands supported Commands supported by Cheetah 15K.6 SAS family drivesCommand name Command code Supported Dual port supportCommands 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 10.3.2.1 ST3600057SS and ST3600957SS Mode Sense data Mode PagesDEF CHG 10.3.2.2 ST3450857SS and ST3450757SS Mode Sense data Mode Data Header Block Descriptor Mode PagesDEF CHG Read Capacity Data Buffer C D E F 10.3.2.3 ST3300657SS and ST3300557SS Mode Sense data Mode PagesMiscellaneous operating features and conditions Miscellaneous featuresSupported Feature or condition Miscellaneous statusSAS physical interface Physical interfaceDatum B Physical characteristics Connector requirementsPin Signal name Signal type Electrical descriptionPin descriptions SAS pin descriptionsSignal characteristics PowerSAS transmitters and receivers Ready LED OutSAS-2 Specification compliance LED drive signalDifferential signals General interface characteristicsSeagate Technology support services Presales SupportTechnical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call CenterToll-freeDirect dialFAX Cheetah 15K.7 SAS Product Manual, Rev. a Index NumericsPage SAS Smart

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