Seagate ST973252SS General DC power requirement notes, Conducted noise immunity, Power sequencing

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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.

7.2.1Conducted noise immunity

Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power connector.

+5V	=	250 mV pp from 100 Hz to 20 MHz.
+12V	=	800 mV pp from 100 0Hz to 8 KHz.
		450 mV pp from 8 KHz to 20 KHz.
		250 mV pp from 20 KHz to 5 MHz.

7.2.2Power sequencing

The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down.

24	Savvio 15K.2 SAS Product Manual, Rev. E

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Contents ST9146852SSST9146752SS ST973452SSST973352SS ST9146652SS ST973252SSStandard Models Self-Encrypting Drive Models SED Fips 140-2 ModelsPage Contents Defect and error management InstallationAbout Fips About self-encrypting drives Interface requirementsPage Savvio 15K.2 SAS Product Manual, Rev. E List of Figures Page Seagate Technology support services Seagate Online Support and ServicesScope Applicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance Electromagnetic compliance for the European UnionAustralian C-Tick Korean MICReference documents European Union Restriction of Hazardous Substances RoHSGeneral description Standard features Media descriptionFormatted capacities PerformanceReliability Programmable drive capacity OptionsPerformance characteristics Internal drive characteristicsSeek performance characteristics Access timeStart/stop time Format command execution timeGeneral performance characteristics 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 Reporting controlThermal monitor Temperature Log Page 0Dh Parameter Code DescriptionPredictive failures State of the drive prior to testing Drive Self Test DSTDST failure definition ImplementationShort and extended tests Short test Function Code 001bExtended test Function Code 010b Log page entriesProduct repair and return information Product warrantyShipping DC power requirements Physical/electrical specificationsAC power requirements 146GB models DC power requirements Gbit mode Amps73GB models DC power requirements Conducted noise immunity General DC power requirement notesPower sequencing Current profiles Current profile for 146GB modelsCurrent profile for 73GB models 146GB models in 3.0 Gbit operation Power dissipation146GB models in 6.0 Gbit operation 73GB models in 6.0 Gbit operation 73GB models in 3.0 Gbit operationRelative humidity Temperature a. OperatingEnvironmental limits Shock Effective altitude sea level a. OperatingShock and vibration Recommended mounting Corrosive environment Air cleanlinessVibration a. Operating-normal Acoustics Mechanical specifications DimensionsLevel 2 security About FipsPurpose Controlled access Admin SPAbout self-encrypting drives Data encryptionDefault password Random number generator RNGDrive locking Data bandsAuthenticated firmware download Power requirementsSupported commands Cryptographic eraseDrive error recovery procedures Defect and error managementDrive internal defects/errors SAS system errors Deferred Auto-Reallocation Background Media ScanMedia Pre-Scan Idle Read After Write Installation Drive orientationCooling Air flowDrive mounting GroundingSAS features Interface requirementsDual port support Scsi commands supported Supported commandsSupported commands Supported commands Supported commands Savvio inquiry data Mode Sense dataInquiry data Page Mode Data Header 00 00 05 12 8B 00 10 Miscellaneous status Miscellaneous operating features and conditionsMiscellaneous features SAS physical interface Datum B Section C C Section a a Physical characteristics Connector requirementsElectrical description Pin descriptionsSAS pin descriptions SAS transmitters and receiversSignal characteristics Additional information SAS-2 Specification complianceGeneral interface characteristics Savvio 15K.2 SAS Product Manual, Rev. E Index NumericsIraw Msid Mtbf See also cooling