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Seagate ST318418N manual Single-ended drivers/receivers for N models, Transmitter characteristics

Models: ST318438LW ST336938LW ST336918N ST318418N

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9.7.1.1Single-ended drivers/receivers for N models

70	Barracuda 36ES2 Product Manual, Rev. B

9.7.1.1Single-ended drivers/receivers for N models

For “N” models which use single-ended drivers and receivers, typical circuits are shown in Figure 24. Termina- tor circuits (see Note [1]) are to be enabled only when the disc drive is first or last in the daisy-chain.

Transmitter characteristics

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Single-ended drives use an ANSI SCSI compatible open collector single-ended driver. This driver is capable of
sinking a current of 48 mA with a low level output voltage of 0.4 volt.

Receiver characteristics

Single-ended drives use an ANSI SCSI single-ended receiver with hysteresis gate or equivalent as a line receiver.

Figure 24. Single-ended transmitters and receivers on N models

Notes.

[1]Part of active terminator circuits. Non-removable LSI terminators, enabled in the drive (model N only) with jumper plug TE when it is first of last in the daisy-chain.

[2]ANSI SCSI compatible circuits.

[3]Total interface cable length should not exceed that specified in ANSI Standard T10/1302D.

[4]Source of drive terminator power is an active circuit which has an input source voltage selected by jumper plug TP. See Figure 14. Applies to N models.

[5]Interface signal levels and logical sense at the drive I/O connector for N models are defined as follows: Vil (low-level input voltage) = 1.0 V maximum (signal true); minimum = Vss – 0.5 V.

Vih (high-level input voltage) = 1.9 V minimum (signal false); maximum = Vdd +0.5V. Vihys (Input Hysteresis) = 425 mV minimum

See ANSI Standard T10/1302D (SPI-3) for detailed electrical specifications.

9.7.1.2Single-ended drivers/receivers for LW models

The maximum total cable length allowed with drives using single-ended I/O driver and receiver circuits depends on several factors. Table 16 lists the maximum lengths allowed for different configurations of drive usage. These values are from the SPI-3 document. All device I/O lines must have equal to or less than 25 pf capacitance to ground, measured at the beginning of the stub.

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Seagate ST318418N manual Single-ended drivers/receivers for N models, Transmitter characteristics, Receiver characteristics

Contents

Product Manual, Volume Barracuda 36ES2 FamilyST336918N ST336938LWPage Product Manual, Volume Barracuda 36ES2 FamilyST336918N ST336938LWPage Revision status summary sheet RevisionDate Writer/EngineerPage Contents 4.0 Performance characteristics5.0 Reliability specifications 6.0 Physical/electrical specifications7.0 Defect and error management 8.0 Installation10.0 Seagate Technology support services 9.0 Interface requirementsList of Figures Barracuda 36ES2 Product Manual, Rev. BPage Figure 1. Barracuda 36ES2 family drive ST336938LW shown 1.0 ScopeBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B 2.0 Applicable standards and reference documentation 2.1 Standards2.1.1 Electromagnetic compatibility 2.1.2 Electromagnetic susceptibilityAustralian C-Tick Korean MICTaiwanese BSMI Reference documents3.0 General description Barracuda 36ES2 Product Manual, Rev. B3.1 Standard features 3.2 Media characteristics3.3 Performance 3.4 Reliability3.7 Factory installed accessories 3.8 Options factory installed3.5 Unformatted and formatted capacities 3.6 Programmable drive capacity4.0 Performance characteristics 4.1 Internal drive characteristics transparent to user4.2 SCSI performance characteristics visible to user 4.2.1 Access timeUltra2 SCSI Ultra160 SCSINotes for Section 4.3 Start/stop time4.5 Cache operation 4.5.1 Caching write dataIn 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 5.0 Reliability specifications 5.1 Error rates5.1.2 Read errors 5.1.3 Write errors5.2 Reliability and service 5.2.2 Preventive maintenance5.2.3 Service life 5.2.4 Service philosophy5.2.6 Hot plugging Barracuda 36ES2 disc drives 5.2.7 S.M.A.R.TControlling S.M.A.R.T Case 1 - All bus devices powered off during removal or insertionPerformance impact Reporting controlDetermining rate Predictive failures5.2.8.2.1 State of the drive prior to testing 5.2.8.1 DST Failure Definition5.2.8.2 Implementation 5.2.8.2.2 Invoking DST5.2.9 Product warranty Short test Function Code 001bExtended 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 6.0 Physical/electrical specifications 6.1 AC power requirements6.2 DC power requirements Barracuda 36ES2 Product Manual, Rev. B6.2.2 Power sequencing 6.2.1 Conducted noise immunity6.2.3 12 V - Current profile Barracuda 36ES2 Product Manual, Rev. BBarracuda 36ES2 Product Manual, Rev. B +5 Volt Current during spindle start - Typical Amper esAmps Nominal average DC curve6.3 Power dissipation ST336938/ST318438 Barracuda 36ES2 Product Manual, Rev. BAmperes WattsST336918/ST318418 Barracuda 36ES2 Product Manual, Rev. BAmperes Watts6.4.1 Temperature 6.4 Environmental limitsBarracuda 36ES2 Product Manual, Rev. B a. Operating6.4.2 Relative humidity 6.4.3 Effective altitude sea level6.4.4 Shock and vibration 6.4.4.1 ShockZ X YZ Y X Barracuda 36ES2 Product Manual, Rev. BFigure 7. Recommended mounting 6.4.5 Air cleanliness 6.4.4.2 Vibration6.4.6 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 7.0 Defect and error management 7.2 Drive error recovery procedures7.1 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 8.0 Installation Configure drive optionsFormatting 8.1 Drive ID/option select headerBarracuda 36ES2 Product Manual, Rev. B Shipped with cover installedDo not install jumpers retain cover Shipped with cover installed Do not install jumpers retain coverBarracuda 36ES2 Product Manual, Rev. B Drive Activity LEDBarracuda 36ES2 Product Manual, Rev. B HostAlternate Usage PlugBarracuda 36ES2 Product Manual, Rev. B Figure 13. J2 option select header for LW modelsFigure 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 8.1.2 Function description installationBarracuda 36ES2 Product Manual, Rev. B jumper8.1.3 Drive orientation 8.2 Cooling8.2.1 Air flow Barracuda 36ES2 Product Manual, Rev. B8.3 Drive mounting 8.4 GroundingBarracuda 36ES2 Product Manual, Rev. B k * x = F 15lb = 67NBarracuda 36ES2 Product Manual, Rev. B 9.0 Interface requirements 9.1 General description9.2 SCSI interface messages supported Barracuda 36ES2 Product Manual, Rev. B9.3 SCSI interface commands supported Barracuda 36ES2 Product Manual, Rev. BBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Table 6 Barracuda 36ES2 family drive Standard Inquiry dataBytes Data HEX9.3.1 Inquiry Vital Product data Unit serial number page 80hImplemented operating definition page 81h Firmware numbers page C0hJumper settings page C2h Barracuda 36ES2 Product Manual, Rev. BBarracuda 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 Barracuda 36ES2 Product Manual, Rev. B DefinitionsMode Page 10 Byte Header Data and Parameter Data Bytes Barracuda 36ES2 Product Manual, Rev. BBarracuda 36ES2 Product Manual, Rev. B 9.4 SCSI bus conditions and miscellaneous features supportedCondition/features supported Conditions or feature Barracuda 36ES2 Product Manual, Rev. BSupported Supported9.6.1 DC cable and connector 9.5 Synchronous data transfer9.5.1 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 Power Barracuda 36ES2 Product Manual, Rev. B9.6.2 SCSI interface physical description 9.6.3 SCSI interface cable requirementsBarracuda 36ES2 Product Manual, Rev. B Table 12 Interface transfer rates supported9.6.4 Mating connectors 9.6.4.1 Mating connectors for N model driveswith adjacent pins 100 mils apart. The connector is keyed see Figure Mating panel mount connector 3M -CHE-2050-J01A10-KLE1 Closed end type 50-pin connector used. Terminators enabled Barracuda 36ES2 Product Manual, Rev. B9.6.4.2 Mating connectors for LW model drives Barracuda 36ES2 Product Manual, Rev. BBarracuda 36ES2 Product Manual, Rev. B Figure 21. SCSI daisy chain interface cabling for LW drivescheck your adapter for Pin 1 locationBarracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Multimode signals Notes for Tables 13 through9.7 Electrical description 9.7.1 Multimode-SE and LVD alternativesOutput characteristics Input characteristicsBarracuda 36ES2 Product Manual, Rev. B voltageTransmitter characteristics Receiver characteristics9.7.1.1 Single-ended drivers/receivers for N models 9.7.1.2 Single-ended drivers/receivers for LW models9.7.1.4 General cable characteristics 9.7.1.3 Low voltage differential I/O circuitsTable 16 Cable characteristics for single-ended circuits Other signals9.9 Terminator power N drives 9.8 Terminator requirementsLW drives 1. Drive accepts terminator power through SCSI bus pin 26 on N modelsBarracuda 36ES2 Product Manual, Rev. B 9.10Disc drive SCSI timing 9.11 Drive activity LED Powered down by removal of DC powerBarracuda 36ES2 Product Manual, Rev. B Format with Immediate option on10.0 Seagate Technology support services Online Services Automated ServicesPresales Support Technical SupportCustomer Service CSO USA/Canada/Latin America Support ServicesEuropean Support Services Warranty ServiceAfrica/Middle East Support Services Asia/Pacific Support ServicesFAX Services-All European Countries Warranty ServiceBarracuda 36ES2 Product Manual, Rev. B Symbols IndexNumerics 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 write error 13 unrecoverable Barracuda 36ES2 Product Manual, Rev. Bwrite 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