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Seagate ST318438LW, ST318418N Drive mounting, Grounding, Barracuda 36ES2 Product Manual, Rev. B

Models: ST318438LW ST336938LW ST336918N ST318418N

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Barracuda 36ES2 Product Manual, Rev. B

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8.3Drive mounting

When mounting the drive using the bottom holes (x-y plane in Figure 7) care must be taken to ensure that the drive is not physically distorted due to a stiff non-flat mounting surface. The allowable mounting surface stiff- ness is 80 lb/in (14.0 N/mm). The following equation and paragraph define the allowable mounting surface stiff- ness:

k * x = F < 15lb = 67N

where ‘k’ represents the mounting surface stiffness (units of lb/in or N/mm), and ‘x’ represents the out-of-plane mounting surface distortion (units of inches or millimeters). The out-of-plane distortion (‘x’) is determined by defining a plane with three of the four mounting points fixed and evaluating the out-of-plane deflection of the fourth mounting point when a known force (F) is applied to the fourth point.

Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate Tech- nology that the drive can meet the shock and vibration specifications given herein while mounted in such an adapter frame. Adapter frames that are available may not have a mechanical structure capa- ble of mounting the drive so that it can meet the shock and vibration specifications listed in this man- ual.

8.4Grounding

Signal ground (PCBA) and HDA ground are connected together in the drive and cannot be separated by the user. The equipment in which the drive is mounted is connected directly to the HDA and PCBA with no electri- cally isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCBA ground, the systems integrator or user must provide a nonconductive (electrically isolating) method of mount- ing the drive in the host equipment.

Increased radiated emissions may result if you do not provide the maximum surface area ground connection between system ground and drive ground. This is the system designer’s and integrator’s responsibility.

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Seagate ST318438LW, ST318418N manual Drive mounting, Grounding, Barracuda 36ES2 Product Manual, Rev. B, k * x = F 15lb = 67N

Contents

Barracuda 36ES2 Family Product Manual, VolumeST336918N ST336938LWPage Barracuda 36ES2 Family Product Manual, VolumeST336918N ST336938LWPage Revision Revision status summary sheetDate Writer/EngineerPage 4.0 Performance characteristics Contents5.0 Reliability specifications 6.0 Physical/electrical specifications8.0 Installation 7.0 Defect and error management10.0 Seagate Technology support services 9.0 Interface requirementsBarracuda 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 Standards 2.0 Applicable standards and reference documentation2.1.1 Electromagnetic compatibility 2.1.2 Electromagnetic susceptibilityKorean MIC Australian C-TickTaiwanese BSMI Reference documentsBarracuda 36ES2 Product Manual, Rev. B 3.0 General description3.2 Media characteristics 3.1 Standard features3.3 Performance 3.4 Reliability3.8 Options factory installed 3.7 Factory installed accessories3.5 Unformatted and formatted capacities 3.6 Programmable drive capacity4.1 Internal drive characteristics transparent to user 4.0 Performance characteristics4.2 SCSI performance characteristics visible to user 4.2.1 Access timeUltra160 SCSI Ultra2 SCSINotes for Section 4.3 Start/stop time4.5.1 Caching write data 4.5 Cache operationIn 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 Manual Barracuda 36ES2 Product Manual, Rev. BBarracuda 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 Error rates 5.0 Reliability specifications5.1.2 Read errors 5.1.3 Write errors5.2.2 Preventive maintenance 5.2 Reliability and service5.2.3 Service life 5.2.4 Service philosophy5.2.7 S.M.A.R.T 5.2.6 Hot plugging Barracuda 36ES2 disc drivesControlling S.M.A.R.T Case 1 - All bus devices powered off during removal or insertionReporting control Performance impactDetermining rate Predictive failures5.2.8.1 DST Failure Definition 5.2.8.2.1 State of the drive prior to testing5.2.8.2 Implementation 5.2.8.2.2 Invoking DSTShort test Function Code 001b 5.2.9 Product warrantyExtended test Function Code 010b 5.2.8.2.4 Log page entriesSeagate 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 6.1 AC power requirements 6.0 Physical/electrical specifications6.2 DC power requirements Barracuda 36ES2 Product Manual, Rev. B6.2.1 Conducted noise immunity 6.2.2 Power sequencing6.2.3 12 V - Current profile Barracuda 36ES2 Product Manual, Rev. B+5 Volt Current during spindle start - Typical Amper es Barracuda 36ES2 Product Manual, Rev. BAmps Nominal average DC curveBarracuda 36ES2 Product Manual, Rev. B 6.3 Power dissipation ST336938/ST318438Amperes WattsBarracuda 36ES2 Product Manual, Rev. B ST336918/ST318418Amperes Watts6.4 Environmental limits 6.4.1 TemperatureBarracuda 36ES2 Product Manual, Rev. B a. Operating6.4.3 Effective altitude sea level 6.4.2 Relative humidity6.4.4 Shock and vibration 6.4.4.1 ShockZ X YZ Y X Barracuda 36ES2 Product Manual, Rev. BFigure 7. Recommended mounting 6.4.4.2 Vibration 6.4.5 Air cleanliness6.4.6 Acoustics 6.4.7 Electromagnetic susceptibilityHeight 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 7.2 Drive error recovery procedures 7.0 Defect and error management7.1 Drive internal defects Barracuda 36ES2 Product Manual, Rev. B1 These values are subject to change 7.3 SCSI systems errorsBarracuda 36ES2 Product Manual, Rev. B Configure drive options 8.0 InstallationFormatting 8.1 Drive ID/option select headerBarracuda 36ES2 Product Manual, Rev. B Shipped with cover installedDo not install jumpers retain cover Do not install jumpers retain cover Shipped with cover installedBarracuda 36ES2 Product Manual, Rev. B Drive Activity LEDHost Barracuda 36ES2 Product Manual, Rev. BAlternate Usage PlugFigure 13. J2 option select header for LW models Barracuda 36ES2 Product Manual, Rev. BFigure 14. J2 option select header for N models Jumper PositionsBarracuda 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 installation 8.1.2 Function descriptionBarracuda 36ES2 Product Manual, Rev. B jumper8.2 Cooling 8.1.3 Drive orientation8.2.1 Air flow Barracuda 36ES2 Product Manual, Rev. B8.4 Grounding 8.3 Drive mountingBarracuda 36ES2 Product Manual, Rev. B k * x = F 15lb = 67NBarracuda 36ES2 Product Manual, Rev. B 9.1 General description 9.0 Interface requirements9.2 SCSI interface messages supported Barracuda 36ES2 Product Manual, Rev. BBarracuda 36ES2 Product Manual, Rev. B 9.3 SCSI interface commands supportedBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Table 6 Barracuda 36ES2 family drive Standard Inquiry data Barracuda 36ES2 Product Manual, Rev. BBytes Data HEXUnit serial number page 80h 9.3.1 Inquiry Vital Product dataImplemented operating definition page 81h Firmware numbers page C0hBarracuda 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 Barracuda 36ES2 Product Manual, Rev. B Conditions or featureSupported Supported9.5 Synchronous data transfer 9.6.1 DC cable and connector9.5.1 Synchronous data transfer periods supported 9.5.2 REQ/ACK offsetBarracuda 36ES2 Product Manual, Rev. B Figure 16. N model drive physical interface 50-pin SCSI I/O connectorPower Barracuda 36ES2 Product Manual, Rev. B Power9.6.3 SCSI interface cable requirements 9.6.2 SCSI interface physical descriptionBarracuda 36ES2 Product Manual, Rev. B Table 12 Interface transfer rates supported9.6.4.1 Mating connectors for N model drives 9.6.4 Mating connectorswith adjacent pins 100 mils apart. The connector is keyed see Figure Mating panel mount connector 3M -CHE-2050-J01A10-KLEBarracuda 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 drivesFigure 21. SCSI daisy chain interface cabling for LW drives Barracuda 36ES2 Product Manual, Rev. Bcheck your adapter for Pin 1 locationBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Notes for Tables 13 through Multimode signals9.7 Electrical description 9.7.1 Multimode-SE and LVD alternativesInput characteristics Output characteristicsBarracuda 36ES2 Product Manual, Rev. B voltageReceiver characteristics Transmitter characteristics9.7.1.1 Single-ended drivers/receivers for N models 9.7.1.2 Single-ended drivers/receivers for LW models9.7.1.3 Low voltage differential I/O circuits 9.7.1.4 General cable characteristicsTable 16 Cable characteristics for single-ended circuits Other signals9.8 Terminator requirements 9.9 Terminator power N drivesLW drives 1. Drive accepts terminator power through SCSI bus pin 26 on N modelsBarracuda 36ES2 Product Manual, Rev. B 9.10Disc drive SCSI timing Powered down by removal of DC power 9.11 Drive activity LEDBarracuda 36ES2 Product Manual, Rev. B Format with Immediate option onAutomated Services 10.0 Seagate Technology support services Online ServicesPresales Support Technical SupportUSA/Canada/Latin America Support Services Customer Service CSOEuropean Support Services Warranty ServiceAsia/Pacific Support Services Africa/Middle East Support ServicesFAX Services-All European Countries Warranty ServiceBarracuda 36ES2 Product Manual, Rev. B Index SymbolsNumerics Barracuda 36ES2 Product Manual, Rev. BBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B write error 13 unrecoverablewrite operation 10 write protect 41 write retry count X3T10/1143DPage Publication Number 100182971, Rev. B, Printed in USA Seagate Technology LLC920 Disc Drive, Scotts Valley, California 95066-4544, USA