Seagate ST3450856FC manual Drive mounting, Grounding

Page 54

If forced air is necessary, possible air-flow patterns are shown in Figure 13. The air-flow patterns are created by 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 guidelines 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 13. Air flow

Above unit

Under unit

8.4Drive 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.

Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate Technology that the drive can meet the shock and vibration specifications given herein while mounted in such an adapter frame. Adapter frames that are available may not have a mechanical structure capable of mounting the drive so that it can meet the shock and vibration specifications listed in this manual.

8.5Grounding

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-

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Cheetah 15K.6 FC Product Manual, Rev. D

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Contents ST3450856FC ST3300656FCST3146356FC Page Contents Installation Physical/electrical specificationsDefect and error management Interface requirementsSeagate Technology support services Cheetah 15K.6 FC Product Manual, Rev. D Scope Model Number Full Disk Encryption FDECheetah 15K.6 FC Product Manual, Rev. D Electromagnetic compatibility Applicable standards and reference documentationStandards Electromagnetic susceptibilityEuropean Union Restriction of Hazardous Substances RoHS Reference documents Ncits TR-20Cheetah 15K.6 FC Product Manual, Rev. D General description Standard features Reliability Media descriptionPerformance Formatted capacitiesFactory-installed options User-installed accessoriesSeek performance characteristics Performance characteristicsInternal drive characteristics Access timeStart/stop time Format command execution time minutesGeneral performance characteristics 176 144 100Prefetch/multi-segmented cache control Cache operationCaching write data Prefetch operation Recoverable 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 Temperature Log Page 0DhDetermining rate Thermal monitorDST failure definition State of the drive prior to testingDrive Self Test DST ImplementationExtended test Function Code 010b Short and extended testsShort test Function Code 001b Log page entriesProduct warranty ShippingProduct repair and return information Cheetah 15K.6 FC Product Manual, Rev. D Physical/electrical specifications AC power requirementsDC power requirements ST3450856FC DC power requirements Gbit Amps ST3450056FC DC power requirements Gbit AmpsST3300656FC DC power requirements Gbit Amps ST3300056FC DC power requirements Gbit AmpsST3146356FC DC power requirements Gbit Amps ST3146756FC DC power requirements Gbit AmpsConducted noise immunity General DC power requirement notesPower sequencing Current profilesTypical ST3450856FC current profiles Typical ST3450056FC current profiles Typical ST3300656FC current profiles Typical ST3300056FC current profiles Typical ST3146356FC current profiles Typical ST3146756FC current profiles Power dissipation 450GB models300GB models Temperature Environmental limits146GB models Relative humidity Effective altitude sea levelPackage size Packaged/product weight Drop height Shock and vibrationShock Recommended mounting Acoustics Air cleanlinessVibration Corrosive environmentRoHS compliance statement Mechanical specifications Mounting configuration dimensionsDefect and error management Drive internal defects/errorsDrive error recovery procedures Page FC-AL system errors Background Media ScanMedia Pre-Scan Deferred Auto-ReallocationIdle Read After Write Drive orientation InstallationDrive ID/option selection CoolingDrive mounting GroundingPage Cheetah 15K.6 FC Product Manual, Rev. D Link services supported Type of frame FC-AL featuresFibre Channel link service frames Interface requirementsFibre Channel task management functions Fibre Channel task management responsesFC Scsi FCP response codes Function name Response code Fibre Channel port login NPort login Plogi payload BytesNPort Login Accept ACC payload Bytes Fibre Channel port login acceptFibre Channel Process Login Process Login Plri payloadProcess Login Accept ACC payload Bytes Fibre Channel Process Login AcceptFibre Channel fabric login Fabric Login Flogi payload BytesFibre Channel fabric accept login Fabric Login Accept ACC payload BytesFibre Channel Arbitrated Loop options Scsi commands supportedDual port support FC-AL options supportedSupported commands Cheetah 15K.6 FC Product Manual, Rev. D Cheetah 15K.6 FC Product Manual, Rev. D Supported commands Mode Sense data Inquiry dataCheetah 15K.6 FC inquiry data Bytes Data hex Page Mode Data Header 000000 Cheetah 15K.6 FC Product Manual, Rev. D Supported Feature or condition Miscellaneous operating features and conditionsMiscellaneous features Miscellaneous statusPhysical characteristics FC-AL physical interfacePhysical description Connector requirements Electrical descriptionPin descriptions FC-SCA pin descriptions Pin Signal name Signal type Pin Signal name Signal typeFC-AL transmitters and receivers Power Fault LED OutEnable port bypass signals Active LED OutMotor start controls Parallel Enclosure Services Interface ESI 11 SEL6 through SEL0 ID linesSetting Arbitrated loop physical address Alpa valuesHex Dec Signal characteristics TTL input characteristicsDevice control codes LED driver signals FC Differential outputFC Differential input Receive eye diagram Eye diagram data values Link rate GHz Cheetah 15K.6 FC Product Manual, Rev. D Presales Support Seagate Technology support servicesInternet Technical SupportWarranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call CenterToll-freeDirect dialFAX Index NumericsFC-AL Flogi Plogi Page See also cooling
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ST3450856FC specifications

The Seagate ST3146356FC, ST3300656FC, and ST3450856FC are hard disk drives designed for enterprise storage solutions, showcasing Seagate’s commitment to performance, reliability, and advanced technology in the data storage sector. These drives cater primarily to the needs of data centers and businesses requiring robust data management capabilities.

The ST3146356FC is notable for its 146GB capacity, 3.5-inch form factor, and 10,000 RPM spindle speed. It employs Serial Attached SCSI (SAS) interface technology, which ensures high data transfer rates and reliable connectivity. This model is designed to handle a multitude of demanding applications, such as online transaction processing and enterprise resource planning, requiring fast access to data and minimized latency.

The ST3300656FC, with a capacity of 300GB, continues the trend of high performance set by its predecessor. This drive also features the 10,000 RPM spindle speed and SAS interface, providing enhanced data throughput and optimized performance for intensive workloads. The drive is built with advanced error recovery features that enhance data integrity and reliability, making it suitable for critical applications where data loss is unacceptable.

The ST3450856FC offers even greater capacity, with a robust 450GB storage option. Like the other models, it operates at 10,000 RPM and utilizes the SAS interface. This drive is designed for scalability, ensuring that it can meet the evolving storage demands of enterprises. It is also equipped with sophisticated technologies such as Seagate's Enhanced S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology), providing continual monitoring of the drive’s health and performance metrics.

All three models share key characteristics, including advanced thermal and power management technologies that help maintain optimal operating temperatures and reduce energy consumption. This is crucial in data center environments where maximizing efficiency is vital for operational cost management. Additionally, Seagate's commitment to low acoustic noise levels ensures quieter operation, which is beneficial in environments where sound levels must be controlled.

In summary, the Seagate ST3146356FC, ST3300656FC, and ST3450856FC drives are engineered for enterprise environments demanding high reliability, speed, and capacity. Their advanced technologies, including SAS interface and enhanced error management systems, make these drives ideal for critical applications in data-intensive sectors. With reinforced durability, effectiveness in managing large volumes of data, and a focus on energy efficiency, these drives symbolize the pinnacle of Seagate's storage innovations for enterprise solutions.
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