Seagate ST31000640SSIM manual General description, Barracuda ES.2 drive illustration

Page 13

3.0General description

Barracuda ES.2 drives combine Tunneling Magnetoresistive (TMR) heads and a Serial Attached SCSI (SAS) interface to provide high performance, high capacity data storage for a variety of systems including engineer- ing workstations, network servers, mainframes, and supercomputers. The Serial Attached SCSI interface is designed to meet next-generation computing demands for performance, scalability, flexibility and high-density storage requirements.

Barracuda ES.2 drives are random access storage devices designed to support the Serial Attached SCSI Pro- tocol as described in the ANSI specifications, this document, and the SAS Interface Manual (part number 100293071) which describes the general interface characteristics of this drive. Barracuda ES.2 drives are clas- sified as intelligent peripherals and provide level 2 conformance (highest level) with the ANSI SCSI-1 standard. The SAS connectors, cables and electrical interface are compatible with Serial ATA (SATA), giving future users the choice of populating their systems with either SAS or SATA hard disk drives. This allows you to continue to leverage your existing investment in SCSI while gaining a 3Gb/s serial data transfer rate.

The head and disk assembly (HDA) is sealed at the factory. Air recirculates within the HDA through a non- replaceable filter to maintain a contamination-free HDA environment.

Note. Never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this requires special facilities. The drive does not contain user-replaceable parts. Opening the HDA for any reason voids your warranty.

An automatic shipping lock prevents potential damage to the heads and disks that results from movement dur- ing shipping and handling. The shipping lock disengages and the head load process begins when power is applied to the drive.

The drives also use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm design that provides excellent performance with minimal power dissipation.

Figure 1. Barracuda ES.2 drive illustration

Barracuda ES.2 SAS Product Manual, Rev. G

7

Image 13

Contents ST31000640SS ST3750630SS ST3500620SS Barracuda ES.2 SASPage Reliability specifications Performance characteristicsPhysical/electrical specifications General descriptionInstallation Defect and error managementInterface requirements Seagate Technology Support Services Barracuda ES.2 SAS Product Manual, Rev Scope Barracuda ES.2 SAS Product Manual, Rev. G Standards Standards, compliance and reference documentsElectromagnetic compatibility Electromagnetic susceptibilityCompliance Reference documents Barracuda ES.2 SAS Product Manual, Rev. G Barracuda ES.2 drive illustration General descriptionMedia description Standard featuresPerformance ReliabilityFormatted capacities Factory-installed optionsProgrammable drive capacity Barracuda ES.2 SAS Product Manual, Rev. G Internal drive characteristics Performance characteristicsAccess time Seek performanceGeneral performance characteristics Format command execution time minutesStart/stop time Cache operation Prefetch/multi-segmented cache controlCaching write data Prefetch operation Error rates Reliability specificationsRecoverable Errors Unrecoverable ErrorsSeek errors Reliability and serviceInterface errors Preventive maintenanceControlling S.M.A.R.T 4 S.M.A.R.TPerformance impact Reporting controlPredictive failures Temperature Log Page 0DhThermal monitor DST failure definition State of the drive prior to testingImplementation Invoking DSTShort test Function Code 001b Product warrantyExtended test Function Code 010b Log page entriesProduct repair and return information ShippingBarracuda ES.2 SAS Product Manual, Rev. G AC power requirements Physical/electrical specificationsDC power requirements ST31000640SS DC power requirementsST3500620SS DC power requirements ST3750630SS DC power requirementsPower sequencing General DC power requirement notesConducted noise immunity Current profilesTypical ST31000640SS drive +5V and +12V current profiles Typical ST3500620SS drive +5V and +12V current profiles Power dissipationBarracuda ES.2 SAS Product Manual, Rev. G Environmental limits Temperature a. OperatingEffective altitude sea level a. Operating Relative humidityShock and vibration ShockPackage size Packaged/product weight Drop height Vibration a. Operating-normal Air cleanlinessAcoustics Corrosive environmentSee Section Barracuda ES.2 SAS Product Manual, Rev. G Physical dimensions Mechanical specificationsDrive internal defects/errors Defect and error managementDrive error recovery procedures 108.29 Background Media Scan SAS system errorsMedia Pre-Scan Idle Read After Write Deferred Auto-ReallocationDrive orientation InstallationAir flow CoolingGrounding Drive mountingBarracuda ES.2 SAS Product Manual, Rev. G Interface requirements SAS featuresDual port support Commands supported by Barracuda ES.2 SAS family drives Scsi commands supportedCommand name Command code Supported Commands supported by Barracuda ES.2 SAS family drives Commands supported by Barracuda ES.2 SAS family drives Commands supported by Barracuda ES.2 SAS family drives Inquiry data Mode Sense dataBarracuda ES.2 SAS inquiry data Bytes Data hex Page Mode Pages 2.1 ST31000640SS Mode Sense data2.2 ST3750630SS Mode Sense data 2.3 ST3500620SS Mode Sense data Miscellaneous features Miscellaneous operating features and conditionsSupported Feature or condition Miscellaneous statusSAS physical interface Datum B Connector requirements Physical characteristicsElectrical description Pin Signal name Signal typePin descriptions SAS pin descriptionsPower Signal characteristicsSAS transmitters and receivers Ready LED OutDifferential signals LED drive signalGeneral interface characteristics Eye masks Eye masks overviewJitter tolerance masks Receive eye maskAbsolute amplitude Normalized time in UISinusoidal Peak-toJitter Frequency in kHzSignal characteristica Units Gbps Transmitter signal characteristicsSignal characteristic Units Gbps Receiver signal characteristicsMaximum allowable jitter Gbps m, n Deterministic jitterqReceiver jitter tolerance Impedance specificationsCompliant jitter test pattern Cjtpat Impedance requirements Sheet 1Impedance requirements Sheet 2 Transmitter characteristicsElectrical TxRx connections = -5,437dB Shows the zero-length test load Receiver characteristics Barracuda ES.2 SAS Product Manual, Rev. G