Seagate ST336918N, ST318418N, ST318438LW Physical/electrical specifications, AC power requirements

Page 31

Barracuda 36ES2 Product Manual, Rev. B

21

6.0Physical/electrical specifications

This section provides information relating to the physical and electrical characteristics of the Barracuda 36ES2 drive.

6.1AC power requirements

None.

6.2DC power requirements

The voltage and current requirements for a single drive are shown in the following table. Values indicated apply at the drive power connector. The table shows current values in Amperes.

Table 2:

DC power requirements

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ST336938

 

 

ST318438

 

 

 

 

 

 

 

 

 

ST336918

ST336938

ST318418

ST318438

 

 

 

 

 

 

Notes

 

 

 

 

 

 

 

 

 

 

SE mode

LVD mode

SE mode

LVD mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Voltage

 

 

 

 

+5 V

+12 V

+5 V

+12 V

+5 V

+12 V

+5 V

+12 V

 

 

 

 

 

 

 

 

 

 

 

 

 

Regulation

 

 

 

[5]

±5%

±5%[2]

±5%

±5%[2]

±5%

±5%[2]

±5%

±5%[2]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[1][7]

0.77

0.31

0.77

0.31

0.78

0.31

0.78

0.31

Average idle current DCX

 

 

 

 

 

 

 

 

 

 

 

Maximum starting current

 

 

 

 

 

 

 

 

 

(peak DC) DC

[1][3]

0.84

2.02

0.86

2.02

0.83

2.05

0.82

2.05

 

 

 

 

 

 

 

 

 

 

Delayed motor start

 

 

 

 

 

 

 

 

 

(max) DC

 

 

 

[1][4]

0.66

0.03

0.66

0.03

0.63

0.03

0.63

0.03

 

 

 

 

 

 

 

 

 

 

Peak operating current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[1][6]

1.11

0.72

1.11

0.72

1.15

0.65

1.16

0.65

DCX

 

 

 

 

Maximum DC

[1]

1.14

0.73

1.14

0.73

1.17

0.66

1.17

0.66

Maximum (peak)

 

1.78

1.74

1.78

1.74

1.80

1.76

1.78

1.76

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[1]Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous current peaks will exceed these values. Power supply at nominal voltage. Number of units tested = 6 at ambient.

[2]For +12 V, a –10% tolerance is permissible during initial start of spindle, and must return to ±5% before 7,200 rpm is reached. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator.

[3]See +12 V current profile in Figure 2.

[4]This condition occurs when the Motor Start Option is enabled and the drive has not yet received a Start Motor command.

[5]See Section 6.2.1 “Conducted Noise Immunity.” Specified voltage tolerance is inclusive of ripple, noise, and transient response.

[6]Operating condition is defined as 8 random block reads at 133 I/Os per second. Current and power spec- ified at nominal voltages. Decreasing +5 volts by 5% increases +5 volt current by 4%.

[7]During idle, the drive heads are relocated every 60 seconds to a random location within the band from track zero to one-fourth of maximum track.

General Notes from Table 2:

1.Minimum current loading for each supply voltage is not less than 1.5% of the maximum operating current shown.

2.The +5 and +12 volt supplies shall 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.

Image 31
Contents Product Manual, Volume Page Product Manual, Volume Page Revision Date Writer/Engineer Sheets Affected Revision status summary sheetPage Contents Interface requirements Defect and error managementInstallation Seagate Technology support servicesBarracuda 36ES2 Product Manual, Rev. B Vii List of FiguresPage Barracuda 36ES2 family drive ST336938LW shown ScopeBarracuda 36ES2 Product Manual, Rev. B Applicable standards and reference documentation Korean MIC Australian C-TickTaiwanese Bsmi General description Reliability Standard featuresMedia characteristics PerformanceOptions factory installed Factory installed accessoriesProgrammable drive capacity Performance characteristics Start/stop time Ultra2 Scsi Ultra160 ScsiPrefetch/multi-segmented cache control Caching write data Cache operationPrefetch operation Barracuda 36ES2 Product Manual, Rev. B Reliability specifications Service philosophy Reliability and servicePreventive maintenance Service lifeControlling S.M.A.R.T 7 S.M.A.R.TPredictive failures Performance impactReporting control Determining rateInvoking DST State of the drive prior to testingDST Failure Definition ImplementationLog page entries Product warrantyShort test Function Code 001b Extended test Function Code 010bProduct repair and return information Barracuda 36ES2 Product Manual, Rev. B AC power requirements Physical/electrical specificationsDC power requirements Conducted noise immunity Power sequencing3 12 V Current profile +5 Volt Current during spindle start Typical Amper es Amps Power dissipation ST336938/ST318438 Barracuda 36ES2 Product Manual, Rev. B ST336918/ST318418 Environmental limits TemperatureShock Barracuda 36ES2 Product Manual, Rev. B Relative humidityEffective altitude sea level Shock and vibrationRecommended mounting Barracuda 36ES2 Product Manual, Rev. B Vibration Air cleanlinessAcoustics Dimension Table Mechanical specificationsMounting configuration dimensions Barracuda 36ES2 Product Manual, Rev. B Drive error recovery procedures Defect and error managementDrive internal defects Scsi systems errors Drive ID/option select header InstallationConfigure drive options FormattingDo not install jumpers retain cover J6 jumper header for N model J5 jumper header on LW models only J2 option select header for LW models Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Function description Cooling Drive orientationAir flow Grounding Barracuda 36ES2 Product Manual, Rev. B Drive mountingBarracuda 36ES2 Product Manual, Rev. B Scsi interface messages supported Interface requirementsScsi interface commands supported Commands supported by Barracuda 36ES2 family drives Barracuda 36ES2 Product Manual, Rev. B Vendor ID Firmware numbers page C0h Inquiry Vital Product dataUnit serial number page 80h Implemented operating definition page 81hJumper settings page C2h Mode Sense data DEF CHG Barracuda 36ES2 Product Manual, Rev. B Condition/features supported Supported Status supported 2 REQ/ACK offset DC cable and connectorPhysical interface Model drive physical interface 50-pin Scsi I/O connector Pin Power Scsi interface cable requirements Scsi interface physical descriptionMating connectors for N model drives Barracuda 36ES2 Product Manual, Rev. B Mating connectorsScsi daisy chain interface cabling for N drives Nonshielded 68 pin Scsi device connector used on LW drives Scsi daisy chain interface cabling for LW drives GND GND DBP1 +DBP1 Electrical description Multimode signalsMultimode-SE and LVD alternatives LVD output signals Input characteristicsSingle-ended drivers/receivers for LW models Transmitter characteristicsReceiver characteristics Single-ended drivers/receivers for N modelsLow voltage differential I/O circuits General cable characteristicsTerminator requirements Terminator power DrivesLW drives Page Following table provides drive activity LED status Drive activity LEDTechnical Support Seagate Technology support services Online ServicesAutomated Services Presales SupportUSA/Canada/Latin America Support Services Customer Service CSOEuropean Support Services Asia/Pacific Support Services Africa/Middle East Support ServicesCall Center Toll-free Direct dial Barracuda 36ES2 Product Manual, Rev. B Index Diffsens LED PCB System chassis Barracuda 36ES2 Product Manual, Rev. B