Seagate ST973451FC, ST936751FC manual General DC power requirement notes

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Table 3:	DC power requirements for ST936751FC

								ST936751FC (1 Gbit)		ST936751FC (2 Gbit)		ST936751FC (4 Gbit)

							Notes	(Amps)	(Amps)	(Amps)	(Amps)	(Amps)	(Amps)

Voltage								+5V	+12V [2]	+5V	+12V [2]	+5V	+12V [2]

Regulation							[5]	±5%	±5% [2]	±5%	±5% [2]	±5%	±5% [2]

							[1] [7]	0.71	0.15	0.72	0.15	0.79	0.15
Avg idle current DCX							[1] [7]	0.71	0.15	0.72	0.15	0.79	0.15

Maximum starting current
(peak DC) DC						3σ	[3]	0.74	1.08	0.76	1.07	0.84	1.07
(peak AC) AC						3σ	[3]	1.23	1.49	1.32	1.49	1.06	1.46

Delayed motor start (max) DC						3σ	[1] [4]	0.42	0.01	0.44	0.01	0.51	0.02

Peak operating current:
							[1] [6]	0.67	0.34	0.69	0.34	0.73	0.34
Typical DCX							[1] [6]	0.67	0.34	0.69	0.34	0.73	0.34
Maximum DC						3σ	[1]	0.67	0.37	0.71	0.36	0.77	0.36
Maximum (peak) DC						3σ		1.36	1.12	1.40	1.10	1.48	1.10

[1]Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these val- ues. Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.

[2]For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 15,000 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator.

[3]See +12V current profile in Figure 2.

[4]This condition occurs when the Motor Start option is enabled and the drive has not yet received a Start Motor command.

[5]See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response.

[6]Operating condition is defined as random 8 block reads

[7]During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track.

General DC power requirement notes.

1.Minimum current loading for each supply voltage is not less than 1.7% of the maximum operating current shown.

2.The +5V and +12V supplies should employ separate ground returns.

3.Where power is provided to multiple drives from a common supply, careful consideration for individual drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak starting current must be available to each device.

4.Parameters, other than spindle start, are measured after a 10-minute warm up.

5.No terminator power.

24	Savvio 15K.1 FC Product Manual, Rev. B

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Contents Savvio 15K.1 FC ST973451FC ST936751FCPage Contents Physical/electrical specifications Defect and error managementInstallation Interface requirementsSeagate Technology support services Savvio 15K.1 FC Product Manual, Rev. B List of Figures Page Scope Savvio 15K.1 family disc driveSavvio 15K.1 FC Product Manual, Rev. B Applicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityEuropean Union Restriction of Hazardous Substances RoHS Reference documents Ncits TR-19Savvio 15K.1 FC Product Manual, Rev. B General description Standard features Media description PerformanceReliability Formatted capacitiesProgrammable drive capacity Factory-installed accessoriesOptions Performance characteristics Internal drive characteristicsSeek performance characteristics Access timeStart/stop time Format command execution timeGeneral performance characteristics Caching write data Prefetch/multi-segmented cache controlCache operation Prefetch operation Recoverable Errors Reliability specificationsError rates Reliability and service Unrecoverable ErrorsSeek errors Interface errorsControlling S.M.A.R.T Hot plugging the drive4 S.M.A.R.T Performance impact Reporting controlDetermining rate Predictive failuresTemperature Log Page 0Dh Parameter Code DescriptionDrive Self Test DST DST failure definitionState of the drive prior to testing ImplementationInvoking DST Short and extended testsProduct warranty Log page entriesAbort ShippingProduct repair and return information DC power requirements Physical/electrical specificationsAC power requirements General DC power requirement notes Power sequencing Conducted noise immunityCurrent profiles +5V +12VTypical ST936751FC drive +12V and +5V current profiles ST973451FC Power dissipationCURRENT/POWER vs Throughput FC 1GB Random 8 Block Reads CURRENT/POWER vs Throughput FC 4GB Random 8 Block Reads FC CURRENT/POWER vs Throughput FC 1GB Random 8 Block Reads ST936751FCEnvironmental limits TemperatureFC CURRENT/POWER vs Throughput FC 4GB Random 8 Block Reads Relative humidity Effective altitude sea levelShock and vibration ShockPackage size Packaged/product weight Drop height Recommended mounting Corrosive environment Air cleanlinessVibration Acoustics Mechanical specifications Drive dimensions inchesDrive error recovery procedures Defect and error managementDrive internal defects/errors FC-AL system errors Deferred Auto-Reallocation Background Media ScanMedia Pre-Scan Idle Read After Write Cooling InstallationDrive orientation Drive mounting GroundingFC-AL features Fibre Channel link service framesLink services supported Type of frame Interface requirementsFibre Channel task management functions Fibre Channel task management responsesFibre Channel Scsi FCP task management functions Task name SupportedFibre Channel port login NPort login Plogi payload BytesFibre Channel port login accept Fibre Channel Process LoginNPort Login Accept ACC payload Bytes Process Login Plri payloadFibre Channel Process Login Accept Fibre Channel fabric loginProcess Login Accept ACC payload Bytes Fabric Login Flogi payload BytesFibre Channel fabric accept login Fabric Login Accept ACC payload BytesDual port support Fibre Channel Arbitrated Loop optionsFC-AL options supported Option SupportedScsi commands supported Supported commands Command code Command nameDisconnect/reconnect control page 02h Savvio 15K.1 FC Product Manual, Rev. B LBdata Supported commands Command code Supported 4 Command name Inquiry data Savvio inquiry data Bytes Data hexMiscellaneous operating features and conditions Miscellaneous featuresSupported Feature or condition Miscellaneous statusPhysical description Physical characteristicsFC-AL physical interface Electrical description Connector requirementsPart description Positions Part number Features Pin descriptions FC-SCA pin descriptions Pin Signal name Signal typePin Signal name Signal type FC-AL transmitters and receivers PowerFault LED Out Motor start controls Enable port bypass signalsActive LED Out Parallel Enclosure Services Interface ESI 11 SEL6 through SEL0 ID linesHex Dec SettingArbitrated loop physical address Alpa values Device control codes Signal characteristicsTTL input characteristics Differential Pecl output Differential Pecl inputSavvio 15K.1 FC Product Manual, Rev. B Seagate Technology support services InternetPresales Support Technical SupportData Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index NumericsFAN Page Plogi SEL ID See also cooling