Seagate ST3450856FC, ST3146356FC manual Start/stop time, Prefetch/multi-segmented cache control

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4.2.2Format command execution time (minutes)

 

 

ST3450856FC

ST3300656FC

ST3146356FC

Maximum (with verify)

176

144

100

Maximum (without verify)

88

72

50

4.2.3

General performance characteristics

 

 

Sustainable disc transfer rate*:

 

 

 

Minimum

 

 

112 Mbytes/sec (typical)

Maximum

 

 

171 Mbytes/sec (typical)

Fibre Channel Interface maximum instantaneous transfer rate

800 Mbytes/sec* per port

Logical block sizes

 

 

 

Default is 512-byte data blocks

 

 

Sector sizes variable to 512, 520, 524 and 528 bytes.

 

 

Read/write consecutive sectors on a track

 

Yes

Flaw reallocation performance impact (for flaws reallocated at format time

Negligible

using the spare sectors per sparing zone reallocation scheme.)

 

Average rotational latency

 

 

2.0 msec

*Assumes no errors and no relocated logical blocks.

Rate measured from the start of the first logical block transfer to or from the host. 1MB/sec = 1,000,000 bytes/sec

4.3Start/stop time

If the Motor Start option is disabled, the drive becomes ready within 20 seconds after DC power is applied. If a recoverable error condition is detected during the start sequence, the drive executes a recovery procedure and the time to become ready may exceed 20 seconds. During spin up to ready time, the drive responds to some commands over the FC interface in less than 3 seconds after application of power. Stop time is 30 seconds (maximum) from removal of DC power.

If the Motor Start option is enabled, the internal controller accepts the commands listed in the Fibre Channel Interface Manual less than 3 seconds after DC power has been applied. After the Motor Start command has been received, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure). The Motor Start command can also be used to command the drive to stop the spindle.

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

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

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Contents Cheetah 15K.6 FC ST3450856FC ST3300656FC ST3146356FCPage Contents Interface requirements Defect and error managementInstallation Seagate Technology support services Cheetah 15K.6 FC Product Manual, Rev. a List of Figures Page Scope Cheetah 15K.6 FC Product Manual, Rev. a Applicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityEuropean Union Restriction of Hazardous Substances RoHS Reference documents Ncits TR-20Cheetah 15K.6 FC Product Manual, Rev. a General description Standard features Media descriptionFactory-installed options PerformanceReliability Formatted capacitiesUser-installed accessories Performance characteristics Internal drive characteristicsSeek performance characteristics Access timeFormat command execution time minutes General performance characteristicsStart/stop time Prefetch/multi-segmented cache controlCache operation Caching write dataPrefetch operation Reliability 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 MillisecondsReporting control Determining ratePredictive failures Thermal monitorState of the drive prior to testing Parameter Code DescriptionDrive Self Test DST DST failure definitionInvoking DST Short and extended testsShort test Function Code 001b Extended test Function Code 010bProduct warranty AbortShipping Product repair and return informationCheetah 15K.6 FC Product Manual, Rev. a Physical/electrical specifications AC power requirementsDC power requirements DC power requirements for ST3450856FC model Gbit AmpsDC power requirements for ST3300656FC model Gbit Amps DC power requirements for ST3146356FC model Gbit AmpsGeneral DC power requirement notes Power sequencingConducted noise immunity Current profilesTypical ST3450856FC current profiles Typical ST3300656FC current profiles Typical ST3146356FC current profiles Power dissipation ST3450856FCST3300656FC ST3146356FC TemperatureEnvironmental limits Relative humidity Effective altitude sea levelShock and vibration ShockPackage size Packaged/product weight Drop height Recommended mounting Air cleanliness VibrationAcoustics Corrosive environmentRoHS compliance statement Mechanical specifications Mounting configuration dimensionsCheetah 15K.6 FC Product Manual, Rev. a Drive error recovery procedures Defect and error managementDrive internal defects/errors Page FC-AL system errors Background Media ScanMedia Pre-Scan Deferred Auto-ReallocationIdle Read After Write Cheetah 15K.6 FC Product Manual, Rev. a Installation Drive ID/option selectionDrive orientation CoolingDrive mounting Air flowGrounding Cheetah 15K.6 FC Product Manual, Rev. a FC-AL features Fibre Channel link service framesLink services supported Type of frame Interface requirementsFC Scsi FCP response codes Function name Response code Fibre Channel task management functionsFibre Channel task management responses Fibre 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 nameVerify error recovery page 07h Cheetah 15K.6 FC Product Manual, Rev. a Temperature page 0Dh Cheetah 15K.6 FC inquiry data Bytes Data hex Mode Sense dataInquiry data Page Mode Data Header 000000 Cheetah 15K.6 FC Product Manual, Rev. a Miscellaneous operating features and conditions Miscellaneous featuresSupported Feature or condition Miscellaneous statusPhysical description Physical characteristicsFC-AL physical interface Pin descriptions Connector requirementsElectrical description FC-AL transmitters and receivers FC-SCA pin descriptions Pin Signal name Signal typePin Signal name Signal type Power Fault LED OutMotor 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 FC Differential input LED driver signalsFC Differential output Receive eye diagram Eye diagram data values Link rate GHz Cheetah 15K.6 FC Product Manual, Rev. a 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 Flogi Plogi Page See also cooling
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ST3450856FC, ST3300656FC, ST3146356FC 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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