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Seagate ST336918N manual ST336918/ST318418, Barracuda 36ES2 Product Manual, Rev. B, Amperes, Watts

Models: ST318438LW ST336938LW ST336918N ST318418N

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Barracuda 36ES2 Product Manual, Rev. B

ST336918/ST318418

The drives typical power dissipation under idle conditions is 8.0 watts (27.3 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 5). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the correspond- ing +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.

	1.800
					5V A
	1.600			21.0	12V A
					Watts
	1.400			19.0
Amperes	1.200			17.0
Amperes	1.000			15.0
	1.000			15.0
					Watts
	0.800			13.0
	0.600			11.0
	0.400			9.0
	0	50	100	150
			I/Os per Second

Figure 5. ST336918/ST318418 DC current and power vs. input/output operations per second (SE)

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Seagate ST336918N, ST318418N ST336918/ST318418, Barracuda 36ES2 Product Manual, Rev. B, Amperes, Watts, I/Os per Second

Contents

ST336938LW Product Manual, VolumeBarracuda 36ES2 Family ST336918NPage ST336938LW Product Manual, VolumeBarracuda 36ES2 Family ST336918NPage Writer/Engineer Revision status summary sheetRevision DatePage 6.0 Physical/electrical specifications Contents4.0 Performance characteristics 5.0 Reliability specifications9.0 Interface requirements 7.0 Defect and error management8.0 Installation 10.0 Seagate Technology support servicesBarracuda 36ES2 Product Manual, Rev. B List of FiguresPage Figure 1. Barracuda 36ES2 family drive ST336938LW shown 1.0 ScopeBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B 2.1.2 Electromagnetic susceptibility 2.0 Applicable standards and reference documentation2.1 Standards 2.1.1 Electromagnetic compatibilityReference documents Australian C-TickKorean MIC Taiwanese BSMIBarracuda 36ES2 Product Manual, Rev. B 3.0 General description3.4 Reliability 3.1 Standard features3.2 Media characteristics 3.3 Performance3.6 Programmable drive capacity 3.7 Factory installed accessories3.8 Options factory installed 3.5 Unformatted and formatted capacities4.2.1 Access time 4.0 Performance characteristics4.1 Internal drive characteristics transparent to user 4.2 SCSI performance characteristics visible to user4.3 Start/stop time Ultra2 SCSIUltra160 SCSI Notes for SectionBarracuda 36ES2 Product Manual, Rev. B 4.5 Cache operation4.5.1 Caching write data In general, 2,048 Kbytes of the physical buffer space in the drive can be used as storage space for cache oper- ations. The buffer can be divided into logical segments Mode Select Page 08h, byte 13 from which data is read and to which data is written. The drive maintains a table of logical block disk medium addresses of the data stored in each segment of the buffer. If cache operation is enabled RCD bit = 0 in Mode Page 08h, byte 2, bit 0. See SCSI Interface Product Manual, part number 75789509, data requested by the host with a Read command is retrieved from the buffer if it is there, before any disc access is initiated. If cache operation is not enabled, the buffer still segmented with required number of segments is still used, but only as circular buffer segments during disc medium read operations disregarding Prefetch operation for the moment. That is, the drive does not check in the buffer segments for the requested read data, but goes directly to the medium to retrieve it. The retrieved data merely passes through some buffer segment on the way to the host. On a cache miss, all data transfers to the host are in accordance with buffer-full ratio rules. On a cache hit the drive ignores the buffer-full ratio rules. See explanations associated with Mode page 02h disconnect/reconnect control in the SCSI Interface Product ManualBarracuda 36ES2 Product Manual, Rev. B 4.5.2 Prefetch operationTables 8 and 9 show Mode default settings for the drives Barracuda 36ES2 Product Manual, Rev. B 5.1.3 Write errors 5.0 Reliability specifications5.1 Error rates 5.1.2 Read errors5.2.4 Service philosophy 5.2 Reliability and service5.2.2 Preventive maintenance 5.2.3 Service lifeCase 1 - All bus devices powered off during removal or insertion 5.2.6 Hot plugging Barracuda 36ES2 disc drives5.2.7 S.M.A.R.T Controlling S.M.A.R.TPredictive failures Performance impactReporting control Determining rate5.2.8.2.2 Invoking DST 5.2.8.2.1 State of the drive prior to testing5.2.8.1 DST Failure Definition 5.2.8.2 Implementation5.2.8.2.4 Log page entries 5.2.9 Product warrantyShort test Function Code 001b Extended test Function Code 010bSeagate repair centers may refuse receipt of components improperly packaged or obviously damaged in tran- sit. Contact your Authorized Seagate Distributor to purchase additional boxes. Seagate recommends shipping by an air-ride carrier experienced in handling computer equipment Product repair and return informationBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B 6.0 Physical/electrical specifications6.1 AC power requirements 6.2 DC power requirementsBarracuda 36ES2 Product Manual, Rev. B 6.2.2 Power sequencing6.2.1 Conducted noise immunity 6.2.3 12 V - Current profileNominal average DC curve Barracuda 36ES2 Product Manual, Rev. B+5 Volt Current during spindle start - Typical Amper es AmpsWatts 6.3 Power dissipation ST336938/ST318438Barracuda 36ES2 Product Manual, Rev. B AmperesWatts ST336918/ST318418Barracuda 36ES2 Product Manual, Rev. B Amperesa. Operating 6.4.1 Temperature6.4 Environmental limits Barracuda 36ES2 Product Manual, Rev. B6.4.4.1 Shock 6.4.2 Relative humidity6.4.3 Effective altitude sea level 6.4.4 Shock and vibrationZ X YZ Y X Barracuda 36ES2 Product Manual, Rev. BFigure 7. Recommended mounting 6.4.7 Electromagnetic susceptibility 6.4.5 Air cleanliness6.4.4.2 Vibration 6.4.6 AcousticsHeight 6.5 Mechanical specificationsBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Figure 9. N mounting configuration dimensionsDimension Table Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B 7.0 Defect and error management7.2 Drive error recovery procedures 7.1 Drive internal defects1 These values are subject to change 7.3 SCSI systems errorsBarracuda 36ES2 Product Manual, Rev. B 8.1 Drive ID/option select header 8.0 InstallationConfigure drive options FormattingBarracuda 36ES2 Product Manual, Rev. B Shipped with cover installedDo not install jumpers retain cover Drive Activity LED Shipped with cover installedDo not install jumpers retain cover Barracuda 36ES2 Product Manual, Rev. BUsage Plug Barracuda 36ES2 Product Manual, Rev. BHost AlternateJumper Positions Barracuda 36ES2 Product Manual, Rev. BFigure 13. J2 option select header for LW models Figure 14. J2 option select header for N modelsBarracuda 36ES2 Product Manual, Rev. B 8.1.1 Notes for Figures 14 through2 These signals are also on J1 I/O connector J5, Pins 1-12. See Figure jumper 8.1.2 Function descriptioninstallation Barracuda 36ES2 Product Manual, Rev. BBarracuda 36ES2 Product Manual, Rev. B 8.1.3 Drive orientation8.2 Cooling 8.2.1 Air flowk * x = F 15lb = 67N 8.3 Drive mounting8.4 Grounding Barracuda 36ES2 Product Manual, Rev. BBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B 9.0 Interface requirements9.1 General description 9.2 SCSI interface messages supportedBarracuda 36ES2 Product Manual, Rev. B 9.3 SCSI interface commands supportedBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Data HEX Barracuda 36ES2 Product Manual, Rev. BTable 6 Barracuda 36ES2 family drive Standard Inquiry data BytesFirmware numbers page C0h 9.3.1 Inquiry Vital Product dataUnit serial number page 80h Implemented operating definition page 81hBarracuda 36ES2 Product Manual, Rev. B Jumper settings page C2hBarracuda 36ES2 Product Manual, Rev. B 9.3.2 Mode Sense dataThe Mode Sense command provides a means for the drive to report its operating parameters to the initiator. The drive maintains four sets of Mode parameters, Default values, Saved values, Current values and Change- able values Definitions Barracuda 36ES2 Product Manual, Rev. BBarracuda 36ES2 Product Manual, Rev. B Mode Page 10 Byte Header Data and Parameter Data BytesBarracuda 36ES2 Product Manual, Rev. B 9.4 SCSI bus conditions and miscellaneous features supportedCondition/features supported Supported Conditions or featureBarracuda 36ES2 Product Manual, Rev. B Supported9.5.2 REQ/ACK offset 9.6.1 DC cable and connector9.5 Synchronous data transfer 9.5.1 Synchronous data transfer periods supportedBarracuda 36ES2 Product Manual, Rev. B Figure 16. N model drive physical interface 50-pin SCSI I/O connectorPower Barracuda 36ES2 Product Manual, Rev. B PowerTable 12 Interface transfer rates supported 9.6.2 SCSI interface physical description9.6.3 SCSI interface cable requirements Barracuda 36ES2 Product Manual, Rev. BMating panel mount connector 3M -CHE-2050-J01A10-KLE 9.6.4 Mating connectors9.6.4.1 Mating connectors for N model drives with adjacent pins 100 mils apart. The connector is keyed see FigureBarracuda 36ES2 Product Manual, Rev. B 1 Closed end type 50-pin connector used. Terminators enabledBarracuda 36ES2 Product Manual, Rev. B 9.6.4.2 Mating connectors for LW model drivesadapter for Pin 1 location Barracuda 36ES2 Product Manual, Rev. BFigure 21. SCSI daisy chain interface cabling for LW drives check yourBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B 9.7.1 Multimode-SE and LVD alternatives Multimode signalsNotes for Tables 13 through 9.7 Electrical descriptionvoltage Output characteristicsInput characteristics Barracuda 36ES2 Product Manual, Rev. B9.7.1.2 Single-ended drivers/receivers for LW models Transmitter characteristicsReceiver characteristics 9.7.1.1 Single-ended drivers/receivers for N modelsOther signals 9.7.1.4 General cable characteristics9.7.1.3 Low voltage differential I/O circuits Table 16 Cable characteristics for single-ended circuits1. Drive accepts terminator power through SCSI bus pin 26 on N models 9.9 Terminator power N drives9.8 Terminator requirements LW drivesBarracuda 36ES2 Product Manual, Rev. B 9.10Disc drive SCSI timing Format with Immediate option on 9.11 Drive activity LEDPowered down by removal of DC power Barracuda 36ES2 Product Manual, Rev. BTechnical Support 10.0 Seagate Technology support services Online ServicesAutomated Services Presales SupportWarranty Service Customer Service CSOUSA/Canada/Latin America Support Services European Support ServicesWarranty Service Africa/Middle East Support ServicesAsia/Pacific Support Services FAX Services-All European CountriesBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B SymbolsIndex NumericsBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B X3T10/1143D write error 13 unrecoverableBarracuda 36ES2 Product Manual, Rev. B write operation 10 write protect 41 write retry countPage Publication Number 100182971, Rev. B, Printed in USA Seagate Technology LLC920 Disc Drive, Scotts Valley, California 95066-4544, USA

ST336918/ST318418

Amperes

Watts

I/Os per Second