Seagate ST118273N Product Manual
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Seagate ST118273N Product Manual

Seagate ST118273N Product Manual

Barracuda 18 family
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Barracuda 18 Family:
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ST118273N/W/WD/LW/WC/LC
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Product Manual, Volume 1
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Summary of Contents for Seagate ST118273N

  • Page 1 ..........ST118273N/W/WD/LW/WC/LC .
  • Page 3 ..........ST118273N/W/WD/LW/WC/LC .
  • Page 4 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology, Inc. Barracuda, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either trademarks or registered trade- marks of Seagate Technology, Inc. or one of its subsidiaries. All other trademarks or registered trade- marks are the property of their respective owners.
  • Page 5 Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. A 03/04/98 D. Ashby/S. Welty 1/1, v thru viii, 1-85 Rev. B 05/21/98 D. Ashby/S. Welty 10, 11, 31, 32, 46, 49, 67, 72, 75, 76, and 77. Rev. C 09/24/98 D.

  • Page 7: Table Of Contents

    Barracuda 18 Product Manual, Rev. C Table of Contents Scope ................1 Applicable standards and reference documentation.
  • Page 8 Seagate Technology support services........
  • Page 9 Barracuda 18 Product Manual, Rev. C List of Figures Figure 1. Barracuda 18 family drive........... . . 1 Figure 2.

  • Page 11: Scope

    Barracuda 18 Product Manual, Rev. C Scope This manual describes the Seagate Technology®, Inc. Barracuda 18™ disc drives. Barracuda 18 drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI-2, and SCSI-3 (Fast-20 and Fast-40) interface specifications to the extent described in this manual. The SCSI Interface Product Manual (part number 77738479) describes general SCSI interface characteristics of this and other families of Seagate drives.

  • Page 13: Applicable Standards And Reference Documentation

    Mounting by bottom holes must meet the requirements of Section 8.4. Standards The Barracuda 18 family complies with Seagate standards as noted in the appropriate sections of this Manual and the Seagate SCSI Interface Product Manual , part number 77738479 (Vol. 2).

  • Page 14: Reference Documents

    X3T10/1142D SPI-2 X3T10/1143D SFF-8046 Specification for 80-pin connector for SCSI disk drives Package Test Specification Seagate P/N 30190-001 (under 100 lb.) Package Test Specification Seagate P/N 30191-001 (over 100 lb.) Specification, Acoustic Test Requirements, and Procedures Seagate P/N 30553-001 In case of conflict between this document and any referenced document, this document takes precedence.

  • Page 15: General Description

    Barracuda 18 family of drives, and the SCSI Interface Product Manual (volume 2), part number 77738479, which describes the general interface characteristics of this and other families of Seagate SCSI drives. The drive’s interface supports multiple initiators, disconnect/reconnect, self-configuring host software, and automatic features that relieve the host from the necessity of knowing the physical characteristics of the targets (logical block addressing is used).

  • Page 16: Figure 2. Barracuda 18 Family Drive

    Barracuda 18 Product Manual, Rev. C A high-performance actuator assembly with a low-inertia, balanced, patented, straight-arm design provides excellent performance with minimal power dissipation. Figure 2. Barracuda 18 family drive...

  • Page 17: Standard Features

    Barracuda 18 Product Manual, Rev. C Standard features The Barracuda 18 family has the following standard features: • Integrated SCSI controller • Single-ended or high voltage differential SCSI drivers and receivers, or low voltage differential drivers and receivers (“LC” and “LW” models only) •...

  • Page 18: Unformatted And Formatted Capacities

    Barracuda 18 Product Manual, Rev. C • Incorporates Seek To Improve Reliability algorithm (STIR) • 5-year warranty Unformatted and formatted capacities Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per sector. The following table shows the standard OEM model read capacities data. Total LBAs = read capacity data shown below +1.

  • Page 19: Performance Characteristics

    Barracuda 18 Product Manual, Rev. C Performance characteristics Internal drive characteristics (transparent to user) ST118273 Drive capacity 18.21 GByte (formatted, rounded off values) Read/write heads Bytes/track 155,000 Bytes (average, rounded off values) Bytes/surface 1,165 Mbytes (unformatted, rounded off values) Tracks/surface (total) 7,501 Tracks (user accessible) Tracks/inch...

  • Page 20: Start/Stop Time

    Barracuda 18 Product Manual, Rev. C SCSI interface data transfer rate (asynchronous) [5]: Maximum instantaneous 6.0 Mbytes/sec [6] Maximum average 6.0 Mbytes/sec [7] Synchronous transfer rate for SCSI Fast-20 (Ultra-1 SCSI): 8 bit data bus models 20 Mbytes/sec 16 bit data bus models 40 Mbytes/sec Synchronous transfer rate for SCSI Fast-40 (Ultra-2 SCSI): 8 bit data bus models...

  • Page 21: Prefetch/Multi-Segmented Cache Control

    Barracuda 18 Product Manual, Rev. C provide information indicating the status of the spin up (i.e., the drive is still in process of coming ready or the drive requires intervention, see SCSI Interface Product Manual , part number 77738479). Stop time is less than 20 seconds from removal of DC power.

  • Page 22: Caching Write Data

    Barracuda 18 Product Manual, Rev. C (see Section 4.5.2). The number of segments may be selected using the Mode Select command, but the size can not be directly selected. Size is selected only as a by-product of selecting the segment number specifica- tion.

  • Page 23: Reliability Specifications

    Barracuda 18 Product Manual, Rev. C Reliability specifications The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4). Seek Errors Less than 10 in 10 seeks Read Error Rates [1] Recovered Data...

  • Page 24: Seek Errors

    Barracuda 18 Product Manual, Rev. C 5.1.4 Seek errors A seek error is defined as a failure of the drive to position the heads to the addressed track. There shall be no more than ten recoverable seek errors in 10 physical seek operations.

  • Page 25: Hot Plugging Barracuda 18 Disc Drives

    Case 4 Current I/O process allowed during insertion or removal, except on the device being changed Seagate Barracuda disc drives support four hot plugging cases. Provision shall be made by the system such that a device being inserted makes power and ground connections prior to the connection of any device signal contact to the bus.

  • Page 26: Product Warranty

    Seagate’s option and at no charge to customer, if returned by customer at cus- tomer’s expense to Seagate’s designated facility in accordance with Seagate’s Warranty Procedure. Seagate will pay for transporting the repair or replacement item to customer.
  • Page 27 Barracuda 18 Product Manual, Rev. C Shipping When transporting or shipping a drive, a Seagate approved container must be used. Keep your original box. They are easily identified by the Seagate Approved Package label. Shipping a drive in a non-approved con- tainer voids the drive warranty.

  • Page 29: Physical/Electrical Specifications

    Barracuda 18 Product Manual, Rev. C Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Barracuda 18 drive. AC power requirements None. DC 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.

  • Page 30: Conducted Noise Immunity

    Barracuda 18 Product Manual, Rev. C 6.2.1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak to peak measurements and apply at the drive power con- nector.

  • Page 31: Power Dissipation

    Barracuda 18 Product Manual, Rev. C Component Nominal (average) DC curve Current (amps) TIME (seconds) Figure 3b. Typical Barracuda 18 family drive +5 V current profile Power dissipation For drives with single ended interface circuits, typical operating random read power dissipation is 20.85 watts (71.2 BTUs per hour) of DC power average at nominal voltages.
  • Page 32 Ultra2 SCSI b. Non-operating –40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 45°F (25°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive.

  • Page 33: Barracuda 18 Product Manual, Rev. C

    Barracuda 18 Product Manual, Rev. C Model “WC/LC” PCB [1] HDA Temp. Check Point PCB 3 Model “W/WD/LW” PCB [1] Model “N” PCB [1] XCVR XCVR XCVR PCB 1 PCB 2 [1] Bottom side of PCB [2] Applies only on “WD” model Figure 4.

  • Page 34: Relative Humidity

    Barracuda 18 Product Manual, Rev. C 6.4.2 Relative humidity The values below assume that no condensation on the drive occurs. a. Operating 5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour. b. Non-operating 5% to 95% non-condensing relative humidity. 6.4.3 Effective altitude (sea level) a.

  • Page 35: Figure 5. Recommended Mounting

    Disc drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from heights as defined in the table below. For additional details refer to Seagate specifications 30190-001 (under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 Kg).

  • Page 36: Air Cleanliness

    Air cleanliness The drive is designed to operate in a typical office environment with minimal environmental control. 6.4.6 Acoustics Sound power during idle mode shall be 4.2 bels typical when measured to Seagate’s 30553-001 specification. 6.4.7 Electromagnetic susceptibility See Section 2.1.2.

  • Page 37: Mechanical Specifications

    Barracuda 18 Product Manual, Rev. C Mechanical specifications The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions of the front panel are shown in figure below. Refer to Figures 6a, 6b, and 6c for detailed mounting configuration dimensions.

  • Page 38: Figure 6B. Mounting Configuration Dimensions For Models "W," "Wd," And "Lw

    Barracuda 18 Product Manual, Rev. C Notes: Mounting holes three on each side, 6-32 UNC. Max screw length into side of drive 0.15 in. (3.81 mm). Screw tightening torque 6.0 in-lb (.675 NM) max with minimum thread engagement of 0.12 in. (3.05 mm). Mounting holes four on bottom, 6-32 UNC.

  • Page 39: Figure 6C. Mounting Configuration Dimensions For Models "Wc" And "Lc

    Barracuda 18 Product Manual, Rev. C Notes: Notes: Mounting holes three on each side, 6-32 UNC. Max screw length into side of drive 0.15 in. (3.81 mm). Screw tightening torque 6.0 in-lb (.675 NM) max with minimum thread engagement of 0.12 in. (3.05 mm).

  • Page 41: Defect And Error Management

    Barracuda 18 Product Manual, Rev. C Defect and error management The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are not dependent upon use of defect management routines by the host (initiator). Defect and error management in the SCSI system involves the drive internal defect/error management and SCSI systems error considerations (errors in communications between Initiator and the drive).

  • Page 42: Scsi Systems Errors

    Barracuda 18 Product Manual, Rev. C Table 4: Read and write retry count maximum recovery times [1] Read retry Maximum recovery time per Write retry Maximum recovery time per count LBA (cumulative, msec) count LBA (cumulative, msec) 91.9 50.1 108.7 75.2 125.4 83.6...

  • Page 43: Installation

    The notes following the figures describe the functions of the various jumper positions on the connectors J2, J1-Auxiliary and J6. Suggested part number for the jumpers used on J2 is 3M part number 956562-30 (Seagate part number 89501860). A bag with the two jumper plug types is shipped with the standard OEM drives.

  • Page 44: Figure 7A. Barracuda 18 Family Drive Id Select Header For Models "N

    Barracuda 18 Product Manual, Rev. C Drive Front Jumper Plug (enlarged to show detail) Pin 1 Reserved A 2 A 1 A 0 SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6...

  • Page 45: Figure 7B. Barracuda 18 Family Drive Id Select For Models "W," "Wd," "Lw," "Wc," And "Lc

    Barracuda 18 Product Manual, Rev. C Drive Front Jumper Plug (enlarged to show detail) Pin 1 Reserved A 2 A 1 A 0 SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6...

  • Page 46: Figure 7C. Barracuda 18 Family Drive Id Select Header J5 For Models "W," "Lw," And "Wd

    Barracuda 18 Product Manual, Rev. C Drive HDA (rear view, PCB facing downward) [1] [2] Pin 1 +5V Ground Pin 1 J1-DC Power Pin 12A 68 Pin SCSI ID = 0 (default) SCSI I/O Connector SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5...

  • Page 47: Figure 7D. Barracuda 18 Family Drive Option Select Header For Models "N," "W," And "Wd

    Barracuda 18 Product Manual, Rev. C Pin 1 Jumper Positions (default - applies to “N” Terminator Enable and “W” models only) Delay Motor Start Enable Motor Start Write Protect Parity Disable (default - applies to “N” Term. Power from Drive and “W”...

  • Page 48: Figure 7F. Barracuda 18 Family Drive Option Select Header For Models "Lc" And "Lw

    Barracuda 18 Product Manual, Rev. C Pin 1 Jumper Positions Force Single-Ended I/O Single-Ended or Low-Voltage Differential Delay Motor Start Enable Motor Start Write Protect Additional notes on these Parity Disable functions in section 8.1.2. Jumper Plug (enlarged to show detail) Drive Front Figure 7f.

  • Page 49: Notes For Figures 7A, 7B, 7C, 7D, 7E, And 7F

    Barracuda 18 Product Manual, Rev. C 8.1.1 Notes for Figures 7a, 7b, 7c, 7d, 7e, and 7f. Notes explaining the functions of the various jumpers on jumper header connectors J2, J5, and J6 are given here and in Section 8.1.2. The term “default” means as standard OEM units are configured with a jumper on those positions when shipped from factory.

  • Page 50: Function Description

    Barracuda 18 Product Manual, Rev. C 8.1.2 Function description jumper installation Jumper function description (Applies only to “N” and “W” models) With the jumper installed, the On-board (non-removable) terminator circuits are enabled (connected to the I/O lines). Default is jumper installed. Terminator circuits not enabled (not connected to I/O lines).

  • Page 51: Drive Orientation

    Barracuda 18 Product Manual, Rev. C Drive orientation The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive perfor- mance characterization, however, has been done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, and these are the two preferred mounting orientations.

  • Page 52: Drive Mounting

    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.

  • Page 53: Interface Requirements

    No attempt is made to describe all of the minute details of conditions and constraints that must be considered by designers when designing a system in which this family of drives can properly operate. Seagate declares that the drives operate in accordance with the appropriate ANSI Standards referenced in various places herein, with exceptions as noted herein or in the Seagate SCSI Interface Product Manual , part number 77738479.

  • Page 54: Scsi Interface Commands Supported

    Barracuda 18 Product Manual, Rev. C SCSI interface commands supported Table 7 following lists the SCSI interface commands that are supported in the SCSI-2, and SCSI-3 modes of the drive. Barracuda 18 Family drives can be changed back and forth between SCSI-1 and SCSI-2/SCSI-3 modes using the Change Definition Command.
  • Page 55 Barracuda 18 Product Manual, Rev. C Table 7: Commands supported by Barracuda 18 family drive (Continued) Command Supported by Command name code Barracuda 18 Mode select (10) Capacity Programming Mode sense Y [2] Caching parameters page (08h) Control mode page (0Ah) Disconnect/reconnect (02h) (DTDC, DIMM not used) Error recovery page (01h) Format page (03h)
  • Page 56 Barracuda 18 Product Manual, Rev. C Table 7: Commands supported by Barracuda 18 family drive (Continued) Command Supported by Command name code Barracuda 18 Search data low Seek Seek extended Send diagnostics Supported diagnostics pages (00h) Translate page (40h) Set limits Start unit/stop unit (spindle ceases rotating) (1Ch) Synchronize cache Test unit ready...

  • Page 57: Inquiry Vital Product Data

    S# Eight ASCII digits representing the eight digits of the product serial number. Bytes 18 through 25 reflect model of drive. Shown here are hex values for Model ST118273N. The hex values for bytes 24 and 25 for the various models are listed below.

  • Page 58: Mode Sense Data

    Barracuda 18 Product Manual, Rev. C 9.3.2 Mode Sense data The 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.
  • Page 59 Barracuda 18 Product Manual, Rev. C The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com- mand pages for SCSI-2/SCSI-3 implementation (see the SCSI Interface Product Manual , P/N 77738479). Definitions: = Saved value = Default value.

  • Page 60: Scsi Bus Conditions And Miscellaneous Features Supported

    Barracuda 18 Product Manual, Rev. C SCSI bus conditions and miscellaneous features supported Asynchronous SCSI bus conditions supported by the drive are listed below. These conditions cause the SCSI device to perform certain actions and can alter the SCSI bus phase sequence. Other miscellaneous operating features supported are also listed here.

  • Page 61: Synchronous Data Transfer

    Details of the physical, electrical and logical characteristics are given in sections following, while the SCSI operational aspects of Seagate drive interfaces are given in the SCSI Interface Product Manual , part number 77738479. This section describes the connectors, cables, signals, terminators and bus timing of the DC and SCSI I/O interface.

  • Page 62: Figure 9A. Physical Interface For "N" Model Drives

    Barracuda 18 Product Manual, Rev. C Power +12V +12V ret + 5V ret + 5V 3P 2P DC Power Connector Pin 1 Pin 1 SCSI I/O Connector Figure 9a. Physical interface for “N” model drives...

  • Page 63: Figure 9B. Model "W," "Wd," And "Lw" Drive Physical Interface (68 Pin J1 Scsi I/O Connector)

    Barracuda 18 Product Manual, Rev. C Power +12V +12V ret + 5V ret + 5V J1-Auxiliary Pin 1 Pin 1A J1-DC Power J1-DC Power J1-Auxiliary Pin 1P Pin 1A Pin 1 68 Pin SCSI I/O Connector Figure 9b. Model “W,” “WD,” and “LW” drive physical interface (68 pin J1 SCSI I/O connector) 80 Pin SCSI I/O and Power Connector...

  • Page 64: Scsi Interface Physical Description

    Barracuda 18 Product Manual, Rev. C 9.6.2 SCSI interface physical description The drive models described by this product manual support the physical interface requirements of the SCSI-3 Parallel Interface-2 (SPI-2) standards as defined in American National Standard document X3T10/1142D, and operate compatibly at the interface with devices that only support earlier SCSI-2 and SCSI-3 standards.

  • Page 65: Scsi Interface Cable Requirements

    Barracuda 18 Product Manual, Rev. C 9.6.3 SCSI interface cable requirements The characteristics of cables used to connect SCSI-3 parallel interface devices are discussed in detail in sec- tion 6 of ANSI Standard X3T10/1142D. The cable characteristics that must be considered when interconnect- ing the drives described in this manual in a SCSI-3 parallel, daisy-chain interconnected system are: •...
  • Page 66 Barracuda 18 Product Manual, Rev. C 9.6.4.2 Mating connectors for “W,” “WD,” and “LW” models The nonshielded cable connector shall be a 68 conductor connector consisting of two rows of 34 male contacts with adjacent contacts 0.050 inch (1.27 mm) apart. Recommended mating flat cable connector part numbers are: Amp Model 786096-7 Female, 68-pin, panel mount...

  • Page 67: Figure 10. Scsi Daisy Chain Interface Cabling For "N," "W," "Wd," And "Lw" Model Drives

    Barracuda 18 Product Manual, Rev. C Recommended mating 80-position PCB mount connectors: Straight-in connector Hot plug version (with ground guide-pin) Seagate P/N: 77678703 Amp US P/N: 2-557103-1 787311-1 with polarization 94-0680-02-1 Amp US P/N: 2-557103-2 787311-2 without polarization 94-0680-02-2 Amp Japan P/N: 5-175475-9...

  • Page 68: Figure 11A. Nonshielded 50 Pin Scsi Device Connector Used On "N" Models

    Barracuda 18 Product Manual, Rev. C 15.24 77.60 7.62 10.03 5.08 2.54 1.45±0.05 6.35 9.27 12.80 R 0.51 Typ. 13.89 14.86 (2X) 2.03±0.25 (3X) R 0.73 0.50 Typ. 1.27 Typ. 1.27 (4X) 17.65 62.23 Ref. 24.13 97.40 1.52 93.72 Ref. 68.58 2.16 60.96...

  • Page 69: Figure 11C. Nonshielded 80 Pin Scsi "Sca-2" Connector, Used On "Wc" And "Lc" Models

    Barracuda 18 Product Manual, Rev. C 7.00 (.276) 12.70 End View (.500) Grounding Pins 2.15±0.10 2 places 57.87 (2.278) –0.15 + .000 – .006 0.15 M Y M C L of Datum Y –Y– Front View Pin 1 ± 0.15 62.15 (2.447) (±...
  • Page 70 Barracuda 18 Product Manual, Rev. C Table 13a: Model “N,” single ended I/O, 50 conductor, signal/contact assignments Connector Cable Connector Signal contact conductor contact Signal name [1] number [12] number [11] number [12] name [1] –DB0 –DB1 –DB2 –DB3 –DB4 –DB5 –DB6 –DB7...
  • Page 71 Barracuda 18 Product Manual, Rev. C Table 13b: “W” models single ended I/O cable 68 conductor signal/contact assignments Connector Cable Connector Signal contact conductor contact Signal name [1] number [3] number [2] number [3] name [1] –DB12 –DB13 –DB14 –DB15 –DBP1 –DB0 –DB1...
  • Page 72 Barracuda 18 Product Manual, Rev. C Table 13c: “WD” models differential cable 68 conductor signal/pin assignments (Nonshielded connector)[13] Note. The minus sign next to the signal indicates asserted state is the low voltage of the two levels used for logic signals. Connector Cable Connector...
  • Page 73 Barracuda 18 Product Manual, Rev. C Table 13d: “LW” models differential cable 68 conductor signal/pin assignments (Nonshielded connector)[13] Note. The minus sign next to the signal indicates asserted state is the low voltage of the two levels used for logic signals. Connector Cable Connector...
  • Page 74 Barracuda 18 Product Manual, Rev. C Table 13e: “WC” models single ended I/O, 80 conductor cable signal/contact assignments Connector Signal contact Signal Contact name [1] number [3] number [3] name[1] 12 V CHARGE 12 V GND 12 V 12 V GND 12 V 12 V GND 12 V...
  • Page 75 Barracuda 18 Product Manual, Rev. C Table 13f: “LC” differential models, 80 pin I/O connector pin assignments (nonshielded connector) [13] Connector Signal contact Signal Contact name [1] number [3] number [3] name[1] 12 V CHARGE 12 V GND 12 V 12 V GND 12 V 12 V GND...
  • Page 76 Barracuda 18 Product Manual, Rev. C Notes [ ] for Tables 13a through 13f. See Section 9.7.1 or 9.6.4.2 for detailed electrical characteristics of these signals. The conductor number refers to the conductor position when using 0.025-inch (0.635 mm) centerline flat ribbon cable.

  • Page 77: Electrical Description

    Barracuda 18 Product Manual, Rev. C Electrical description “N” and “W” models use single-ended interface signals. These signals must be terminated with 110-ohm active termination circuits at each end of the total cable. Single-ended circuits use open collector or three state driv- ers.

  • Page 78: Differential Drivers/Receivers

    Barracuda 18 Product Manual, Rev. C ANSI SCSI compatible circuits. Total interface cable length should not exceed that specified in ANSI Standard X3T10/1142D. Source of drive terminator power is an active circuit which has an input source voltage selected by jumper plug TP.

  • Page 79: Figure 14. Typical High-Voltage Differential I/O Line Transmitter/Receiver And External Terminators

    See Section 9.7.2 for signal characteristics. I/O Line terminators. If SCSI device is a Seagate disc drive, terminators and a place to plug them in must be provided external to the drive by user, systems integrator or host equipment manufacturer where needed.

  • Page 80: Figure 15. Lvd Output Signals

    Barracuda 18 Product Manual, Rev. C 9.7.2.2 Multimode—SE or LVD alternative “LW” and “LC” models have I/O circuits that can operate either in single-ended (SE) or low voltage differential mode (LVD). When the interface “DIFFSNS” line is between 0 V and .6 V, the drive interface circuits operate single-ended and up to and including 20 M transfers/s (Fast-20 or Ultra-1 SCSI).

  • Page 81: Terminator Requirements

    Barracuda 18 Product Manual, Rev. C Input characteristics Each signal (Vs) received by LVD interface receiver circuits shall have the following input characteristics when measuared at the disk drive connector: Steady state Low level output voltage* = 0.030 V = < V = <...

  • Page 82: Terminator Power

    Barracuda 18 Product Manual, Rev. C Note. The SCSI protocol chip drives the upper eight data and parity bits of the SCSI bus even when operat- ing in narrow (eight bit) mode. This is normal operation for this chip. If the unused data bit signals are connected to conductors that extend out beyond this drive’s SCSI connector, correct termination must be provided for these unused signals at the device/system at each end of the bus onto which this drive is connected.

  • Page 83: Disc Drive Scsi Timing

    Barracuda 18 Product Manual, Rev. C 9.10 Disc drive SCSI timing Table 14: Disc drive SCSI timing These values are not current Barracuda 18 values, but are listed for information only. Waveform Waveform Description symbol [1] table [1] Typical timing <1.4 µs Target Select Time (no Arbitration) 1.93 µs...
  • Page 84 Barracuda 18 Product Manual, Rev. C Table 14: Disc drive SCSI timing These values are not current Barracuda 18 values, but are listed for information only. Waveform Waveform Description symbol [1] table [1] Typical timing 0.12 µs ±1 µs Next CDB Byte Access (Byte 10 of 10) T23.10.10 4.5-4 0.04 µs...

  • Page 85: Seagate Technology Support Services

    Online services Using a modem, you can obtain troubleshooting tips, free utility programs, drive specifications and jumper set- tings for Seagate’s entire product line. You can also download software for installing and analyzing your drive. SeaNET You can obtain technical information about Seagate products over the Internet from Seagate’s World Wide Web home page (http://www.seagate.com) or Seagate’s ftp server (ftp://ftp.seagate.com).
  • Page 86 Barracuda 18 Product Manual, Rev. C FAX services ® SeaFAX You can use a touch-tone telephone to access Seagate’s automated FAX system to receive technical support information by return FAX. This service is available 24 hours daily. Location Phone number...
  • Page 87 Barracuda 18 Product Manual, Rev. C Customer service centers Seagate direct OEM, Distribution, and Systems Integrator customers should contact their Seagate service rep- resentative for warranty information. Other customers should contact their place of purchase. Seagate offers comprehensive customer support for all Seagate drives. These services are available worldwide.
  • Page 89 Barracuda 18 Product Manual, Rev. C Index backward compatibility 5 bits/inch 9 buffer 11 Symbols buffer segment 11 buffer-full 11 +5 and +12 volt supplies 19 buffer-full ratio 11 “G” list 31 bulkhead connector 54 “P” list 31 bus device reset message 48 bytes per sector 46 Numerics bytes/surface 9...
  • Page 90 Barracuda 18 Product Manual, Rev. C current requirements 19 drive ID 33 current value 48 drive ID select 34 cylinder boundary 12 drive ID select jumper connector 33 drive ID/option select header 33 drive insertion 15 drive interface connector 56 daisy-chain 20 drive internal 20 80 conductor 56...
  • Page 91 Barracuda 18 Product Manual, Rev. C Fast-20 SCSI 5 initiator Fast-40 SCSI 5 termination 71 fault status 13 inquiry command 47 FCC rules and regulations 3 inquiry vital product data 47 field repair 14 installation 33 firmware 48 installation guide 4 flat ribbon cable 66 installation instructions 33 flaw reallocation 10...
  • Page 92 Barracuda 18 Product Manual, Rev. C medium error 14 out-of-plane deflection 42 message protocol 51 out-of-plane distortion 42 message protocol system 32 output voltage 67 messages overhead time 10 SCSI interface 43 miscellaneous features 50 mode page 01 48 package size 25 mode page 08h 11 package test specification 4 mode parameter 48...
  • Page 93 SCSI-3 Parallel Interface-2 (SPI-2) 54 recommended mounting 25 SE 39 recording code 9 SE drivers 15 recoverable seek error 14 Seagate support service 33 reference documents 4 sector 11 regulation 19 sector interleave 9 relative humidity 24 sector size 7...
  • Page 94 Barracuda 18 Product Manual, Rev. C single-ended drive 67 initiator 71 single-ended drivers 15 terminator 33 single-ended I/O 40 active 71 single-ended interface circuit 21 passive 71 single-ended interface signals 67 terminator circuit 40 single-ended SCSI driver 7 terminator enable jumper TE 33 single-ended SCSI receiver 7 terminator power 40 site installation 14...
  • Page 95 Barracuda 18 Product Manual, Rev. C zoned bit recording (ZBR) 7...
  • Page 98 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 77767512, Rev. C, Printed in USA...

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