Seagate ST15150N - Barracuda 4.3 GB Hard Drive Product Manual
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Seagate ST15150N - Barracuda 4.3 GB Hard Drive Product Manual

Seagate ST15150N - Barracuda 4.3 GB Hard Drive Product Manual

Barracuda 4 disc drive
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Barracuda 4 Disc Drive
ST15150N/ND
ST15150W/WD/WC/DC
Product Manual, Volume 1

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Summary of Contents for Seagate ST15150N - Barracuda 4.3 GB Hard Drive

  • Page 1 Barracuda 4 Disc Drive ST15150N/ND ST15150W/WD/WC/DC Product Manual, Volume 1...
  • Page 3 Barracuda 4 Disc Drive ST15150N/ND ST15150W/WD/WC/DC Product Manual, Volume 1...
  • Page 4 Seagate Technology, Inc. Other product names are registered trademarks or trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publication may be reproduced in any form without written permission from Seagate Technology, Inc.
  • Page 5 Revision status summary sheet Sheets Revision Date Writer/Engineer Affected 06/27/94 L. Newman/J. Olson 03/08/95 L. Newman/J. Olson 1, 8, 9, 14, 17, 24, 25, 26, 27, 28, 29, 30, 31, 35, 36, 37, 38, 39, 43, 49, 53, 54, 55, 56, 57, 59, 60, 61, 62, 63, 66, 67, 68, 70, 71, 72, 74, 75, 82, 83, 84.

  • Page 7: Table Of Contents

    Contents Scope ........................... 1 Applicable standard and reference documentation ............3 2.1 Standards ........................3 2.2 Applicable reference documents .................. 3 General description ......................5 Standard features ....................... 7 4.1 Performance ........................ 7 4.1.1 Reliability ......................7 4.2 Unformatted and Formatted Capacities ............... 8 4.3 Options ........................
  • Page 8 Heat/power dissipation ....................36 Environmental limits ....................36 7.4.1 Temperature ....................36 7.4.2 Relative humidity ....................36 7.4.3 Effective altitude (sea level) ................37 7.4.4 Shock and vibration ..................37 7.4.5 Air cleanliness ....................38 7.4.6 Acoustics ......................38 Electromagnetic compatibility ..................38 Mechanical specifications ...................39 7.6.1 Drive orientation ....................42 7.6.2 Cooling ......................42 Media characteristics ......................43...
  • Page 9 Figures Figure 1. Barracuda 4 disc drive ..................... Figure 2. Barracuda disc drive (exploded view) ..............Figure 3. OEM interruptible thermal calibration implementation ..........13 Figure 4. Synchronized drive interconnect diagram ..............17 Figure 5. Synchronized reference signal characteristics ............18 Figure 6.

  • Page 11: Scope

    This manual defines the performance characteristics of the Barracuda 4 drives. The SCSI-2 Interface Product Manual (part number 77738479) describes the general SCSI interface characteristics of this and other families of Seagate drives. N/ND type W/WD type WC/DC type Figure 1.
  • Page 12 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D...

  • Page 13: Applicable Standard And Reference Documentation

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Applicable standard and reference documentation Seagate takes all reasonable steps to insure that its products are certifiable to currently accepted standards. Typical applications of these disc drives include customer packaging and subsystem design. Safety agencies conditionally certify component parts, such as the Barra- cuda disc drive, based on their final acceptability in the end-use product.
  • Page 14 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D...

  • Page 15: General Description

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D General description Barracuda drives are low cost, high performance, random access storage devices designed to meet the needs of the original equipment manufacturer (OEM) marketplace. The Barracuda drive’s interface supports multiple initiators, disconnect/ reconnect, self-configuring host software, and automatic features that re- lieve the host from knowing the physical characteristics of the targets (logical block addressing is used).
  • Page 16 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Barracuda drives use a dedicated landing zone at the innermost radius of the media to eliminate the possibility of destroying or degrading data by landing in the data zone. The drive automatically goes to the landing zone when the power is removed.

  • Page 17: Standard Features

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Standard features Barracuda 4 drives have the following standard features: • Integrated SCSI controller • Single-ended or differential SCSI drivers and receivers • Asynchronous and synchronous data transfer protocols • Firmware downloadable using a SCSI interface •...

  • Page 18: Unformatted And Formatted Capacities

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Unformatted and Formatted Capacities Standard OEM models are formatted to 512 bytes per block. ST15150 drives have nine (9) spare sectors per cylinder and one (1) spare cylinder per unit. Formatted Unformatted 4,294 Mbytes 5,062 Mbytes Users having the necessary equipment may modify the data block size before issuing a format command to obtain different formatted capacities.

  • Page 19: Installation

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Installation For option jumper locations and definitions refer to Figures 20, 22, or 24. Drive default mode parameters are not normally needed for installation. Refer to Section 11.3.2 for default mode parameters if you need them. •...
  • Page 20 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D...

  • Page 21: Performance Characteristics

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Performance characteristics This section provides performance-related characteristics and features of Barracuda 4 drives. Internal drive characteristics Drive capacity, Mbytes unformatted 5,062 Read/write data heads, maximum (physical) Bytes per track, average bytes 64,160 Bytes per surface, Mbytes unformatted 232.4 Cylinders/tracks per surface, user accessible 3,711...
  • Page 22 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D ASA II download code thermal calibration (TCAL) 1. All heads are thermally calibrated at power-up and following SCSI resets before any read or write commands are processed. All heads are also thermally calibrated during the SCSI Rezero Unit command. 2.

  • Page 23: Seek Time

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Start TCAL 10 min. head timer expired? target target received a SCSI received a SCSI 10 minute command? command? timer Target SCSI completes heads heads command in SCSI calibrated? calibrated? progress? command Seek to Select TCAL cyl Complete next...

  • Page 24: General Performance Characteristics

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D General performance characteristics Minimum sector interleave 1 to 1 Data buffer to/from disc media 512-byte sector Data transfer rate ( 1 sector) Minimum 5.30 Mbytes/sec* Maximum 8.94 Mbytes/sec* Data transfer rate (< 1 track) Minimum, divided by interleave factor 3.56 Mbytes/sec Maximum, divided by interleave factor 7.65 Mbytes/sec...

  • Page 25: Start/Stop Time

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Start/stop time Disabling the Motor Start option causes the drive to become ready within 30 seconds after DC power is applied. If a recoverable error condition is detected during the start sequence, the drive executes a recovery proce- dure this may cause the time it takes for the drive to become ready to exceed 30 seconds.
  • Page 26 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 2. When a requested logical block is reached that is not in any segment, the drive fetches it and any remaining requested logical block addresses from the disc and puts them in a segment of the cache. The drive transfers the remaining requested logical blocks from the cache to the initiator in accordance with the “buffer-full”...

  • Page 27: Caching Write Data

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Caching write data Write caching is a drive write operation that uses a drive buffer storage area where the data to be written to the disc is stored while the drive performs the Write command. Write caching is enabled along with read caching.

  • Page 28: Figure 5. Synchronized Reference Signal Characteristics

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D The host can reconfigure the drive any time after power-up to be the master or a slave by using the Mode Select command on the Rigid Disc Drive Geometry page. The master provides the reference signal to which all other drives phase-lock, including the master.
  • Page 29 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D SCSI interface factors The Rotational Position Locking (RPL) field in byte 17 (bits 0 and 1) of the Rigid Disc Drive Geometry mode parameters page 04h is used for enabling and disabling spindle synchronization mode (see the SCSI-2 Interface Product Manual).
  • Page 30 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D...

  • Page 31: Reliability Specifications

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Reliability specifications The following reliability specifications assume correct host and drive opera- tional interface, including all interface timings, power supply voltages, and environmental requirements. Seek error rate Less than 10 errors in 10 seeks Recoverable error rate Less than 10 errors in 10 bits transferred (using default settings)

  • Page 32: Seek Errors

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 6.1.3 Seek errors A seek error is defined as a failure of the drive to position the heads at the addressed track. There must be no more than one recoverable seek error in physical seek operations. After detecting an initial seek error, the drive automatically reseeks to the addressed track up to three times.

  • Page 33: Figure 6. Air Flow

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Above unit Under unit Note. Air flows in the direction shown (back to front) or in reverse direction (front to back) Above unit Under unit Note. Air flows in the direction shown or in reverse direction (side to side) Figure 6.

  • Page 34: Figure 7. Ayhx Temperature Measurement Locations

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D To confirm that the required cooling for the Barracuda electronics and HDA is provided, place the drive in its final mechanical configuration, perform random write/read operations and, after the temperatures stabilize, measure the case temperature of the components listed on the next several pages. To obtain the maximum temperature for each of the reference components listed, add 15°C to the MTBF case temperatures.

  • Page 35: Figure 8. Lyhx Temperature Measurement Locations

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Air-flow cooling ST15150ND drives differential MTBF 800k hours Card Component Reference case temperature (°C) LYHX Polar LYHX Writer LYHX CSAW LYHX Pike LYHX Driver HDA housing Figure 13 The air-flow pattern with which the temperature guidelines above were generated is shown in Figure 6.

  • Page 36: Figure 9. Myhx Temperature Measurement Locations

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Air-flow cooling ST15150W drives single-ended wide MTBF 800k hours Card Component Reference case temperature (°C) MYHX Polar MYHX Writer MYHX CSAW MYHX Pike MYHX Driver HDA housing Figure 13 The air-flow pattern with which the temperature guidelines above were generated is shown in Figure 6.

  • Page 37: Figure 10. Nyhx Temperature Measurement Locations

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Air-flow cooling ST15150WD drives differential wide MTBF 800k hours Card Component Reference case temperature (°C) NYHX Polar NYHX Writer NYHX CSAW NYHX Pike NYHX Driver HDA housing Figure 13 The air-flow pattern with which the temperature guidelines above were generated is shown in Figure 6.

  • Page 38: Figure 11. Jyhx Temperature Measurement Locations

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Air-flow cooling ST15150WC drives single-ended wide (SCA) MTBF 800k hours Card Component Reference case temperature (°C) JYHX Polar JYHX Writer JYHX CSAW JYHX Pike JYHX Driver HDA housing Figure 13 The air-flow pattern with which the temperature guidelines above were generated is shown in Figure 6.

  • Page 39: Figure 12. Kyhx Temperature Measurement Locations

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Air-flow cooling ST15150DC drives differential wide (SCA) MTBF 800k hours Card Component Reference case temperature (°C) KYHX Polar KYHX Writer KYHX CSAW KYHX Pike KYHX Driver HDA housing Figure 13 The air-flow pattern with which the temperature guidelines above were generated is shown in Figure 6.

  • Page 40: Preventive Maintenance

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Measure the HDA housing temperature at the location specified in Figure 13. 1 . 0 . 5 0 Figure 13. Temperature measurement location 6.2.3 Preventive maintenance No preventive maintenance is required. 6.2.4 Service life The drive has a useful service life of five years. Depot repair or replacement of major parts is permitted during this period.

  • Page 41: Hot Plugging Barracuda 4 Disc Drives

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 6.2.8 Hot plugging Barracuda 4 disc drives Caution. Hot-plug drives are not designed for simultaneous power discon- nection and physical removal. During power-up and power-down periods, the hot SCSI connect/disconnect capability does not produce glitches or any corruptions on an active SCSI bus.
  • Page 42 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D...

  • Page 43: Physical/Electrical Specifications

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of Barracuda 4 drives. AC power requirements None. DC power requirements The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive’s power connector.

  • Page 44: Conducted Noise Immunity

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D [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 7.2.1 “Conducted noise immunity.” Specified voltage toler- ance is inclusive of ripple, noise, and transient response. [6] At power-up, the motor current regulator limits the 12V current to an average value of less than 2.18A, although instantaneous peaks may exceed this value.

  • Page 45: 12V Current Profile

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 7.2.3 12V current profile Figure 14 identifies the drive’s 12V current profile. The current during the various times is as shown. 2.85 Peak AC Nominal (average) curve Minimum AC TIME (S) Figure 14. Typical Barracuda 4 drive 12V current profile Power is applied to the drive.

  • Page 46: Heat/Power Dissipation

    Non-operating temperature should remain between –40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This assumes that the drive is packaged in the shipping container designed by Seagate. 7.4.2 Relative humidity The values below assume that no condensation on the drive occurs.

  • Page 47: Effective Altitude (Sea Level)

    50 Gs at a maximum duration of 11 msec (half-sinewave) Shock may be applied in the X, Y, or Z axis. d. Packaged The drive as packaged by Seagate for general freight shipment with- stands a drop test against a concrete floor or equivalent with specifica- tions not exceeding: 20 pounds (8.95 kg) for pack’s gross weight...

  • Page 48: Air Cleanliness

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 7.4.4.2 Vibration a. Operating in a normal environment The drive as installed for normal operation operates error free while subjected to continuous vibration not exceeding: 5-400 Hz @ 0.5 G Vibration may be applied in the X, Y, or Z axis. b.

  • Page 49: Mechanical Specifications

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Mechanical specifications The following nominal dimensions do not include the decorative front-panel accessory. Refer to Figure 15 for detailed mounting configuration dimen- sions for ST15150N/ND drives. Refer to Figure 16 for detailed mounting configuration dimensions for ST15150W/WD drives. Refer to Figure 17 for detailed mounting configuration dimensions for ST15150WC/DC drives.

  • Page 50: Figure 16. Mounting Configuration Dimensions For W/Wd Drives

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 0.050" minimum clearance Notes: Mounting holes two on each side, 6-32 UNC. Max screw length into side of drive is 0.15 in. (3.81 mm). Mounting holes four on bottom, 6-32 UNC. Max screw length into bottom of drive is 0.15 in.

  • Page 51: Figure 17. Mounting Configuration Dimensions Forwc/Dc Drives

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 0.050" minimum clearance Notes: Mounting holes two on each side, 6-32 UNC. Max screw length into side of drive is 0.15 in. (3.81 mm). Mounting holes four on bottom, 6-32 UNC. Max screw length into bottom of drive is 0.15 in.

  • Page 52: Drive Orientation

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 7.6.1 Drive orientation The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive performance evaluations, however, have been done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, which are the two preferred mounting orientations.

  • Page 53: Media Characteristics

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Media characteristics This section provides information regarding the media used in Barracuda 4 disc drives. Media description The media used on the drive has a diameter of approximately 95 mm (3.7 inches). The aluminum substrate is coated with a thin-film magnetic material, which has a proprietary protective layer for improved durability and environ- mental protection.
  • Page 54 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D...

  • Page 55: Defect And Error Management

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Defect and error management The drive, as delivered, complies with this Product Manual. The read error rates and specified storage capacities are not dependent on using defect management routines by the host (initiator). Defect and error management in the SCSI system involves the drive internal defect/error management and SCSI system error considerations (errors in communications between the initiator and the drive).
  • Page 56 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D...

  • Page 57: Drive Configuration

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 10.0 Drive configuration This section describes how to configure Barracuda 4 drives. Option headers may be used to customize many functions of the drives for your particular system. You can also synchronize the spindles of two or more ST15150N/ ND/W/WD drives using circuit-board connectors.

  • Page 58: Figure 20. St15150N/Nd Drives Option Select Jumper Connectors

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Figure 20 illustrates ST15150N/ND drives option select jumper connectors. SCSI Connector Pin 1 SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 SCSI ID = 7 Reserved.
  • Page 59 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Block Pins Function ST15150N 1 & 2 Terminator enable. J01 option jumpers 3 & 4 Terminator power to the SCSI bus. 5 & 6 Terminator power from the SCSI bus. 3 & 4 and Terminator power to the SCSI bus and drive. 5 &...

  • Page 60: St15150W/Wd Drives Option Headers

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 10.1.2 ST15150W/WD drives option headers SCSI I/O Connector Pin 1 DC Power Connector Figure 21. ST15150W/WD drives option header locations...

  • Page 61: Figure 22. St15150W/Wd Drives Option Select Jumper Connectors

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Figure 22 illustrates ST15150W/WD drives option select jumper connectors. SCSI Connector Pin 1 SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 SCSI ID = 7 Pin 1...
  • Page 62 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Block Pins Function 1 & 2* Terminator power supplied from the drive. 2 & 4* Terminator power supplied from the SCSI bus. 1 & 3 Terminator power supplied to the SCSI bus. 1 & 3 and Terminator power supplied to the SCSI bus and drive. 2 &...

  • Page 63: St15150Wc/Dc Drives Option Headers

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 10.1.3 ST15150WC/DC drives option headers Figure 23. ST15150WC/DC drives option header locations Figure 24 illustrates ST15150WC/DC drives option select jumper connec- tors. Pin 1 Figure 24. ST15150WC/DC drives option select connectors...
  • Page 64 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Block Pin Function Fault Vendor unique Spindle sync Activity LED No connection Reserved Reserved Reserved Reserved Ground Write protect Reserved Reserved Parity enable Ground Reserved Reserved...

  • Page 65: Synchronized Spindles Interface

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 10.2 Synchronized spindles interface The synchronized spindles interface (SSI) allows several drives operating from the same host to operate their spindles at a synchronized rotational rate. The system operation is described in Section 5.7. 10.2.1 Electrical description The electrical interface consists of one digital TTL reference index signal and ground.

  • Page 66: Figure 26. St15150N/Nd Drives Configuration Select Header Specification

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 10.2.1.2 Termination The reference index signal (SSREF ) is terminated with a 2.21K ohm resistor. Each single-ended drive has a terminator resistor located on the main PCB. The terminator resistor is not removable and is always in the circuit.

  • Page 67: Grounding

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 10.3 Grounding Signal ground (PCB) and HDA ground are connected together in the Barracuda 4 family drives—do not separate this connection. Maximizing the conductive contact area between HDA ground and system ground may reduce radiated emissions. A bracket shield with tapped holes is available to system integrators.
  • Page 68 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D...

  • Page 69: Interface Requirements

    11.0 Interface requirements This section describes the interface requirements as implemented on Barracuda 4 drives. ASA I is Seagate’s first generation of Advanced SCSI Architecture firmware. ASA II is Seagate’s second generation of Advanced SCSI Architecture firmware. 11.1 General description The major portion of the interface requirements/implementation is described in the SCSI-2 Interface Product Manual (part number 77738479).

  • Page 70: Scsi Interface Commands Supported

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.3 SCSI interface commands supported Table 5 lists the SCSI interface commands supported in SCSI-1 and SCSI-2 modes. Barracuda 4 family drives can be changed back and forth between SCSI-1 and SCSI-2 modes by using the Change Definition command. Standard OEM drives are shipped set to operate in SCSI-2 mode.
  • Page 71 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Supported by Command ASA I ASA I ASA II Command name code SCSI-1 SCSI-2 SCSI-2 Read Read Buffer Read Capacity Read Defect Data Read Extended Read Long Reassign Blocks Receive Diagnostic Results Supported Diagnostics Pages Translate Page –...

  • Page 72: Inquiry Data

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.3.1 Inquiry data Tables 6 and 7 list the Inquiry command data that the drive should return to the initiator per the format provided in the SCSI-2 Interface Product Manual. Table 6. Barracuda 4 drives inquiry data (ASA I) Bytes Data (hex) 0-15 00 00 ** *** 8F 00 00 [1A] 53...

  • Page 73: Mode Sense Data

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.3.2 Mode sense data The following tables list the data-byte values the drive returns in response to the Mode Sense command pages for SCSI-1 and SCSI-2 implementations (see the SCSI-2 Interface Product Manual). Definitions: DEF = Default value; standard drives are shipped configured this way. CHG = Changeable bits;...
  • Page 74 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Table 9. Mode sense data, Barracuda 4 drives default values (ASA I, SCSI-2 implementation) Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Mode Sense 9F 00 10 08 Data...
  • Page 75 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Table 10. Mode sense data, Barracuda 4 drives default values (ASA II, SCSI-2 implementation) Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Mode Sense AB 00 10 08 Data...

  • Page 76: Scsi Bus Conditions And Miscellaneous Features Supported

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.4 SCSI bus conditions and miscellaneous features supported Asynchronous SCSI bus conditions supported by the drive are listed in Table 11. These conditions cause the SCSI device to perform certain actions and can alter the phase sequence. Other miscellaneous operating features supported are also listed here.

  • Page 77: Synchronous Data Transfer

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.5 Synchronous data transfer The data transfer period to be used by the drive and the initiator is established by an exchange of messages during the Message Phase of operation. See the section on message protocol in the SCSI-2 Interface Product Manual. 11.5.1 Synchronous data transfer periods supported Table 12 lists synchronous data transfer periods supported by the drive.

  • Page 78: Scsi Physical Interface

    WC and DC drives. Details of the physical, electrical, and logical characteristics are given in the following sections. The SCSI operational aspects of Seagate drive interfaces are provided in the SCSI-2 Interface Product Manual. SCSI I/O...

  • Page 79: Physical Characteristics

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.7.1 Physical characteristics This section defines the connectors, cables, signals, terminators, and bus timing needed to implement the SCSI interface. 11.7.1.1 Physical description You can daisy chain multiple SCSI devices on a common cable if each device has the same types of drivers and receivers (all single-ended or all differen- tial).

  • Page 80: Connector Requirements

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.7.1.2.3 General cable characteristics In general, cables having the characteristic impedances given in Sections 11.7.1.2.1 and 11.7.1.2.2 are not available; however, impedances that are somewhat lower are satisfactory. A characteristic impedance of 100 ohm 10% is recommended for non-shielded flat or twisted-pair ribbon cable. However, most available cables have a somewhat lower characteristic impedance.

  • Page 81: Electrical Description

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D ST15150WC/DC drives Recommended mating SCA-2 part numbers: AMP vertical (SCA), 80-position: 787311-1, 3.18 mm tail length with polarization feature 787311-2, 3.18 mm tail length without polarization feature 787311-3, 4.57 mm tail length with polarization feature 787311-4, 4.57 mm tail length without polarization feature 11.7.3 Electrical description...

  • Page 82: Figure 31. Single-Ended Transmitters And Receivers

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Line Driver Line Receiver Transmitter Receiver +2.85V +2.85V (or transceiver) Flat Cable Pair Figure 31. Single-ended transmitters and receivers Notes: [1] Part of active terminator circuits. Enable drive termination when it is first or last on the daisy chain. Interface signal levels and logical sense at the drive I/O connector are defined as follows: Logic level...

  • Page 83: Figure 32. Typical Differential I/O Line Transmitter/Receiver And Terminators

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Differential voltage = 1.0V minimum with common-mode voltage ranges from 7V DC to 12V DC * Measure these voltages between the output terminal and the SCSI device’s logic ground reference. The output characteristics must additionally conform to EIA RS-485-1983. Input characteristics Each signal received by differential interface drives should have the following input characteristics when measured at the disc drive’s SCSI connector:...
  • Page 84 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.7.3.3 Terminator requirements ST15150N drives Internal disc drive I/O termination consists of active circuits contained in permanently mounted IC terminator packs on the main PCB. All single initiator/single target (non-daisy-chain) applications require you to terminate the initiator and drive.

  • Page 85: Scsi Non-Wide Physical Interface

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D ST15150WC drives do not have internal termination available. You must add single-ended external termination when termination is required. 11.8 SCSI non-wide physical interface Ref. (15.24) (10.67) Typ. (5.08) .065 x 45 Chamfer Typ. (1.65) Pin 1 .037 Ref.
  • Page 86 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Table 14. Single-ended cable pin assignments (non-shielded connector) for ST15150N drives Signal Pin number Signal Pin number DB (0) GROUND DB (1) GROUND DB (2) DB (3) GROUND DB (4) DB (5) DB (6) DB (7) DB (P) GROUND GROUND...
  • Page 87 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Table 15. Differential cable pin assignments (non-shielded connector) for ST15150ND drives Signal name* Pin number Signal name* SHIELD GND GROUND DB (0) DB (0) DB (1) DB (1) DB (2) DB (2) DB (3) DB (3) DB (4) DB (4) DB (5)

  • Page 88: Scsi Wide Physical Interface

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.9 SCSI wide physical interface 1.368 .767 .300 (34.75) (19.46) (7.62) .315 (8.00) Position 1 Position 1 Position 1 .740 .870 (18.8) (22.1) 68 Position SCSI Receptacle AMPLIMITE .050 Series 12 Position Auxiliary 4 Position Power Shrouded Post Header Header, Commercial AMPMODU 2mm...
  • Page 89 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Table 16. Single-ended contact assignments (P cable) for ST15150W drives Signal Connector Connector Signal name contact number contact number name GROUND DB (12) GROUND DB (13) GROUND DB (14) GROUND DB (15) GROUND DB (P1) GROUND DB (0) GROUND...
  • Page 90 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Table 17. Differential contact assignments (P cable) for ST15150WD drives Signal Connector Connector Signal name contact number contact number name DB (12) DB (12) DB (13) DB (13) DB (14) DB (14) DB (15) DB (15) DB (P1) DB (P1) GROUND...

  • Page 91: Scsi Sca Physical Interface

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.10 SCSI SCA physical interface Side View Section X–X 7.00 (.276) 12.70 End View (.500) Grounding Pins 57.87 (2.278) –0.15 + .000 – .006 0.15 C L of Datum Y –Y– Front View Pin 1 62.15 0.15 (2.447)
  • Page 92 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Table 18. SCA contact assignments for ST15150WC drives Signal Connector Connector Signal name contact number contact number name 12 VOLT 12V GROUND 12 VOLT 12V GROUND 12 VOLT 12V GROUND 12 VOLT 12V GROUND RESERVED/NC RESERVED/NC RESERVED/NC GROUND...
  • Page 93 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Table 19. SCA contact assignments for ST15150DC drives Signal Connector Connector Signal name contact number contact number name 12 VOLT 12V GROUND 12 VOLT 12V GROUND 12 VOLT 12V GROUND 12 VOLT 12V GROUND RESERVED/NC RESERVED/NC RESERVED/NC DIFF SENSE...

  • Page 94: Disc Drive Scsi Timing

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.11 Disc drive SCSI timing Table 20. Disc drive SCSI timing Waveform Waveform Description symbol [1] table [1] Typical Target select time (no arbitration) < 1 µs < 250 µs Target select time (with arbitration) 4.5-1,2 2.31 µs 2.36 µs...
  • Page 95 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Waveform Waveform Description symbol [1] table [1] Typical Data in byte transfer (parameter) 4.5-12 0.04 µs Data out byte transfer (parameter) 4.5-13 0.04 µs Next data in byte access (parameter) 4.5-12 0.10 µs 0.12 µs Next data out byte access (parameter) 4.5-13 0.10 µs...
  • Page 96 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D...

  • Page 97: Index

    ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D Index daisy chaining 69 data buffer 7, 14 heads, number of 11 transfer rate 14 AC power requirements 33 zone 6 accessories data block size Barracuda 4 Installation Guide 8 modifying the 8 acoustics 38 DC cable and connector 67 active termination 7, 71 DC power requirements 33...
  • Page 98 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D error correction code 7 error rates 21 jumper connector 52 ETF defect list 45 jumper connectors European Union requirements 3 explained 49, 52, 54 illustrated 48, 51 fans positioning for cooling 22 KYHX temperature features measuring 29 listed 7 firmware 7...
  • Page 99 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D SCA contact assignments 83 SCSI panel documents, ANSI 3 front kit 8 SCSI bus conditions and misc. features 66 panel, front kit 8 SCSI drivers and receivers 7 Parity Disable option 49, 52 SCSI interface performance cable connector requirements 70 general 7, 14...
  • Page 100 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D single-unit shipping pack 8 single-unit shipping pack kit 8 UL 3 spare reallocation 8 unformatted capacity 8 spindle unit attention 19 stopping with the Motor Start unrecoverable error command 15 defined 21 spindle brake 7 unrecoverable write errors spindle sync cable connector 49, 52 defined 21...
  • Page 101 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D...
  • Page 102 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 83328880, Rev. D, Printed in USA...

This manual is also suitable for:

St15150ndSt15150wSt15150wdSt15150wcSt15150dc

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