Seagate ST3300657SS, 100516226, ST3300457SS General performance characteristics, START/STOP Time

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4.2.3 General performance characteristics

Sustainable disk transfer rate*:

 

 

Minimum

122

Mbytes/sec (typical)

Maximum

204

Mbytes/sec (typical)

SAS Interface maximum instantaneous transfer rate

600

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.

The START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 30 seconds (maximum) from removal of DC power. There is no power control switch on the drive.

4.4PREFETCH/MULTI-SEGMENTED CACHE CONTROL

The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance system performance. Cache refers to the drive buffer storage space when it is used in cache operations. To select this feature, the host sends the Mode Select command with the proper values in the applicable bytes in page 08h. Prefetch and cache operations are independent features from the standpoint that each is enabled and disabled independently using the Mode Select command; however, in actual operation, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2.

All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in Section 11.3.2.1.

CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F

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Contents Standard models Self-Encrypting Drive models SED Fips 140-2 modelsPage Contents About Fips About SELF-ENCRYPTING Drives Defect and Error ManagementInstallation Interface RequirementsCheetah 15K.7 SAS Product MANUAL, REV. F III Seagate Technology Support Services SED ScopeFips 140-2 L Evel Compliance STANDARDS, Compliance and Reference DocumentsStandards Taiwanese Bsmi Australian C-TickKorean KCC European Union Restriction of Hazardous Substances RohsGeneral Description Performance Standard FeaturesMedia Description Formatted Capacities FACTORY-INSTALLED OptionsReliability ST3600057SS ST3450857SS ST3300657FCAccess time Performance CharacteristicsInternal Drive Characteristics Format command execution time minutesPREFETCH/MULTI-SEGMENTED Cache Control General performance characteristicsSTART/STOP Time Cache Operation Caching write data Prefetch operationReliability and Service Reliability SpecificationsError Rates 4 S.M.A.R.T Preventive maintenanceHot plugging the drive Controlling S.M.A.R.TReporting control Performance impactMilliseconds Determining rateDrive Self Test DST Temperature Log Page 0DhParameter Code Description DST failure definitionInvoking DST State of the drive prior to testingImplementation Short and extended testsAbort Product warrantyLog page entries ShippingDC Power Requirements PHYSICAL/ELECTRICAL SpecificationsAC Power Requirements 600 GB DC power requirements450 GB DC power requirements 300 GB DC power requirements Current profiles Power sequencingConducted noise immunity Typical 450GB current profiles Power Dissipation Environmental Limits Temperature a. Operating300GB model Relative humidity Effective altitude sea level a. OperatingShock and vibration ShockVibration Recommended mountingCorrosive environment Air cleanlinessAcoustics RoHS compliance statementMechanical Specifications Units of Measure mm inchesSeagate Enterprise SED PurposeValidation Program Data Encryption Controlled AccessAbout SELF-ENCRYPTING Drives Random Number Generator RNGSupported Commands Authenticated Firmware DownloadPower Requirements Drive LockingDrive Error Recovery Procedures Defect and Error ManagementDrive Internal DEFECTS/ERRORS SAS System Errors Read and write retry count maximum recovery timesDeferred AUTO-REALLOCATION Background Media ScanMedia PRE-SCAN Idle Read After WriteCooling InstallationDrive Orientation Drive Mounting GroundingTask management functions SAS FeaturesInterface Requirements Task management responsesScsi Commands Supported Commands supported by Cheetah 15K.7 SAS family drivesCommands supported by Cheetah 15K.7 SAS family drives Commands supported by Cheetah 15K.7 SAS family drives Cheetah 15K.7 inquiry data Mode Sense dataInquiry data Cheetah 15K.7 SAS Product MANUAL, REV. F 11.3.2.1 600GBmodel Mode Sense data 11.3.2.2 450GB model Mode Sense data 11.3.2.3 300GB model Mode Sense data Miscellaneous features Miscellaneous Operating Features and ConditionsSupported Feature or condition SAS physical interfaceDatum B This Area Electrical description Physical characteristicsConnector requirements Pin descriptionsSAS transmitters and receivers PowerSignal Characteristics Ready LED OutBPS Differential signalsSAS-2 Specification Compliance Additional InformationIndex Page SAS See also cooling Seagate Technology LLC Americas
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