Seagate ST3146356SS, ST3300656SS manual Start/stop time, Format command execution time minutes

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4.2.2Format command execution time (minutes)

	ST3450856SS	ST3300656SS	ST3146356SS
Maximum (with verify)	176	144	100
Maximum (without verify)	88	72	50

Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the Initiator (excluding connect/disconnect).

4.2.3	General performance characteristics
Sustainable disk transfer rate*:
Minimum		112 Mbytes/sec (typical)
Maximum		171 Mbytes/sec (typical)
SAS Interface maximum instantaneous transfer rate		300 Mbytes/sec* per port
Logical block sizes
Default is 512-byte data blocks
Sector sizes variable to 512, 520, and 528 kbytes.
Read/write consecutive sectors on a track		Yes
Flaw reallocation performance impact (for flaws reallocated at format time using		Negligible
the spare sectors per sparing zone reallocation scheme.)
Average rotational latency		2.0 msec
*Assumes system ability to support the rates listed and no cable loss.
1 MB/sec = 1,000,000 bytes/sec

4.3Start/stop time

The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has been applied.

If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START STOP UNIT command with the START bit equal to 0, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure).

If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE SPINUP) primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a START STOP UNIT command with the START bit equal to 1, the drive waits for a NOTIFY (ENABLE SPINUP) primitive. After receiving a NOTIFY (ENABLE SPINUP) primitive through either port, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure).

If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does not receive a NOTIFY (ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT command.

12	Cheetah 15K.6 SAS Product Manual, Rev. A

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Contents Cheetah 15K.6 SAS ST3450856SS ST3300656SS ST3146356SSPage Contents Seagate Technology support services Defect and error managementInstallation Interface requirementsList of Figures Cheetah 15K.6 SAS disk driveCheetah 15K.6 SAS Product Manual, Rev. a Scope Cheetah 15K.6 SAS disk driveCheetah 15K.6 SAS Product Manual, Rev. a Electromagnetic compatibility Standards, compliance and reference documentsStandards Electromagnetic susceptibilityCompliance European Union Restriction of Hazardous Substances RoHSReference documents Cheetah 15K.6 SAS Product Manual, Rev. a General description Standard features Media descriptionPerformance Reliability Factory-installed accessoriesOptions factory installed Formatted capacitiesCheetah 15K.6 SAS Product Manual, Rev. a Access time Performance characteristicsInternal drive characteristics Seek timeFormat command execution time minutes General performance characteristicsStart/stop time 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 monitorReference Temperature Temperature Log Page 0DhPrimary Temperature Parameter Code DescriptionShort and extended tests State of the drive prior to testingInvoking DST Short test Function Code 001bShipping Product warrantyAbort Product repair and return informationCheetah 15K.6 SAS Product Manual, Rev. a DC power requirements Physical/electrical specificationsAC power requirements ST3450856SS DC power requirementsST3300656SS Gbit mode Amps ST3300656SS DC power requirementsST3146356SS DC power requirements ST3146356SS Gbit mode AmpsConducted noise immunity General DC power requirement notesPower sequencing Current profilesTypical ST3450856SS current profiles Typical ST3300656SS current profiles Typical ST3146356SS current profiles Power dissipation ST3450856SS in 3 Gbit operationST3300656SS CURRENT/POWER vs Throughput SAS 3.0GB ST3300656SS in 3 Gbit operationST3146356SS CURRENT/POWER vs Throughput SAS 3.0GB ST3146356SS in 3 Gbit operationRandom 8 Block Reads Temperature Environmental limitsShock and vibration Relative humidityEffective altitude sea level ShockPackage size Packaged/product weight Drop height Recommended mountingAcoustics Air cleanlinessVibration Corrosive environmentMechanical specifications Physical dimensions Cheetah 15K.6 SAS Product Manual, Rev. a Defect and error management Drive internal defects/errorsDrive error recovery procedures 51.87 SAS system errors Background Media ScanMedia Pre-Scan Deferred Auto-Reallocation Idle Read After WriteInstallation Drive orientationCooling Air flowDrive mounting GroundingCheetah 15K.6 SAS Product Manual, Rev. a SAS features Interface requirementsDual port support Scsi commands supported Commands supported by Cheetah 15K.6 SAS family drivesCommand name Command code Supported 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 Mode Sense data Inquiry dataBytes Data hex Page 2.1 ST3450856SS Mode Sense data Mode Pages2.2 ST3300656SS Mode Sense data 2.3 ST3146356SS Mode Sense data Supported Feature or condition Miscellaneous operating features and conditionsMiscellaneous features Miscellaneous statusSAS physical interface Datum B Physical characteristics Connector requirementsPin descriptions Pin Signal name Signal typeElectrical description SAS pin descriptionsSAS transmitters and receivers Signal characteristicsPower Ready LED OutGeneral interface characteristics LED drive signalDifferential signals Eye masks Eye masks overviewAbsolute amplitude Receive eye maskJitter tolerance masks Normalized time in UIJitter Peak-toSinusoidal Frequency in kHzTransmitter signal characteristics Signal characteristica Units GbpsMaximum allowable jitter Receiver signal characteristicsSignal characteristic Units Gbps Gbps m, n Deterministic jitterqCompliant jitter test pattern Cjtpat Impedance specificationsReceiver jitter tolerance Impedance requirements Sheet 1Transmitter characteristics Impedance requirements Sheet 2Electrical TxRx connections = -5,437dB Shows the zero-length test load Receiver characteristics Cheetah 15K.6 SAS Product Manual, Rev. a Presales Support Seagate Technology support servicesInternet Technical SupportWarranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Index NumericsPage SAS See also cooling