Seagate ST19171W - Barracuda 9.1 GB Hard Drive Product Manual
  1. Manuals
  2. Brands
  3. Seagate Manuals
  4. Storage
  5. ST19171W - Barracuda 9.1 GB Hard Drive
  6. Product manual
Seagate ST19171W - Barracuda 9.1 GB Hard Drive Product Manual

Seagate ST19171W - Barracuda 9.1 GB Hard Drive Product Manual

Barracuda 9 disc drive
Hide thumbs Also See for ST19171W - Barracuda 9.1 GB Hard Drive:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Installation Manual
Enlarged version
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Barracuda 9 Disc Drive
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST19171N/W/WD/WC/DC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Manual, Volume 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Advertisement

Table of Contents
loading

Related Manuals for Seagate ST19171W - Barracuda 9.1 GB Hard Drive

Summary of Contents for Seagate ST19171W - Barracuda 9.1 GB Hard Drive

  • Page 1 ..........Barracuda 9 Disc Drive .
  • Page 3 ..........Barracuda 9 Disc Drive .
  • Page 4 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology, Inc. Barracuda, SeaFAX, SeaFONE, SeaNET, SeaTDD, and SeaBOARD are either trademarks or registered trademarks of Seagate Technology, Inc. or one of its subsidiaries. All other trademarks or registered trademarks are the property of their respective owners.
  • Page 5 Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. A 12/06/96 D. Ashby/G. Olson Rev. B 04/10/97 D. Ashby/G. Olson 3, 4, 5, 7, 9, 10, 12, 18, 24, 25, 26, 31, 44, 46, 47, 49, 50, 52, 55, 56, 58, 66, 67, 69, 70, 75, and 76.

  • Page 7: Table Of Contents

    Barracuda 9 Product Manual, Rev. C Contents Scope ................1 Applicable standards and reference documentation.
  • Page 8 Seagate technical support services ........
  • Page 9 Barracuda 9 Product Manual, Rev. C List of Figures Figure 1. Barracuda 9 disc drive (ST19171N drive shown) ........1 Figure 2.

  • Page 11: Scope

    Barracuda 9 Product Manual, Rev. C Scope This manual describes Seagate Technology®, Inc. Barracuda 9™ disc drives. Barracuda 9 drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI-2, and SCSI-3 (Fast-20) interface specifications to the extent described in this manual. The SCSI Inter- face 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

    Section 8.4. Standards The Barracuda 9 family complies with Seagate standards as noted in the appropriate sections of this manual and the Seagate SCSI Interface Product Manual (volume 2), part number 77738479.

  • Page 14: Reference Documents

    Fast-20 (also called “Ultra SCSI”) SFF-8046 Specification for 80-pin SCA connector for SCSI disk drives Performance testing of shipping containers and systems: Seagate P/N 30190-001 (under 100 lb.) and Seagate P/N 30191-001 (over 100 lb.) In case of conflict between this document and any referenced document, this document takes precedence.

  • Page 15: General Description

    (volume 1), which defines the product performance char- acteristics of the Barracuda 9 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.

  • Page 16: Standard Features

    Barracuda 9 Product Manual, Rev. C Figure 2. Barracuda 9 family drive Standard features Barracuda 9 drives have the following standard features: • Integrated SCSI controller • Single-ended or differential SCSI drivers and receivers • 8-bit and 16-bit I/O data bus models available •...

  • Page 17: Media Characteristics

    Barracuda 9 Product Manual, Rev. C Media characteristics The media used on the drive has a diameter of approximately 3.5 inches (86 mm). The aluminum substrate is coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection.

  • Page 18: Options (Factory Installed)

    Barracuda 9 Product Manual, Rev. C Options (factory installed) All options that a customer may request are incorporated during production or packaged at the manufacturing facility before shipping. Some of the options available are: • The capacities shown in Section 3.5. You can order other capacities by selecting other sparing schemes and sector sizes.

  • Page 19: Performance Characteristics

    Barracuda 9 Product Manual, Rev. C Performance characteristics Internal drive characteristics (transparent to user) ST19171 Drive capacity 11.7 Gbyte (unformatted) [1] Read/write heads Bytes/track 102,000 Bytes (average, unformatted) [1] Bytes/surface 585 Mbytes (unformatted) Tracks/surface, total 5,274 Tracks (user accessible) Tracks/inch 5,555 TPI Bits/inch, minimum 91,500 BPI...
  • Page 20 Barracuda 9 Product Manual, Rev. C SCSI interface data transfer rate (asynchronous) [4]: Maximum instantaneous 5.0 Mbytes/sec [5] Maximum average 10.0 Mbytes/sec [6] Synchronous transfer rate for SCSI Fast-20 (Ultra SCSI) 2.5 to 20 Mbytes/sec (8 bit data bus models) Synchronous transfer rate for SCSI Fast-20 (Ultra SCSI) 5.0 to 40 Mbytes/sec (16 bit data bus models)

  • Page 21: Start/Stop Time

    Barracuda 9 Product Manual, Rev. C Start/stop time Disabling the Motor Start option causes the drive to become ready within 30 seconds after DC power is applied at nominal voltage. This means the motor starts as soon as power is applied. If a recoverable error condition is detected during the start sequence, the drive will execute a recovery procedure and may cause the time to become ready to be as much as 60 seconds.

  • Page 22: Caching Write Data

    Barracuda 9 Product Manual, Rev. C Case B - Read command is received and the first logical block address requested is not in any segment of the cache. 1. The drive fetches the requested logical blocks from the disc and transfers them into a segment, then from there to the initiator in accordance with the “buffer-full”...
  • Page 23 Barracuda 9 Product Manual, Rev. C replaces data already in some buffer segment(s), the host can limit the amount of prefetch data to optimize system performance. The max prefetch field (bytes 8 and 9) limits the amount of prefetch. The drive does not use the prefetch “ceiling”...

  • Page 25: Reliability Specifications

    Barracuda 9 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 1 in 10 seeks Read error rates [1] Recovered data...

  • Page 26: Seek Errors

    Barracuda 9 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 should not be more than 1 recoverable seek error in 10 physical seek operations.

  • Page 27: Hot Plugging Barracuda 9 Disc Drives

    Barracuda 9 Product Manual, Rev. C 5.2.6 Hot plugging Barracuda 9 disc drives Caution: Hot-plug drives are not designed for simultaneous power disconnection 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. Barracuda 9 drives conform to the SCSI-3 standard require- ments for glitch-free power-on and power-off.

  • Page 28: 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 29 Barracuda 9 Product Manual, Rev. C Seagate 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.

  • Page 31: Physical/Electrical Specifications

    Barracuda 9 Product Manual, Rev. C Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of Barracuda 9 drives. 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’s power connector.

  • Page 32: Conducted Noise Immunity

    Barracuda 9 Product Manual, Rev. C Track following at track 0. [10] Seeking is defined as a third-stroke seek at OD. A command is issued every 20 msec. [11] Read track is defined as repeat reads of track 15 with a duty cycle of 92% for narrow single-ended and 54% for wide differential.

  • Page 33: Power Dissipation

    Barracuda 9 Product Manual, Rev. C Peak AC Peak DC Min AC TIME (S) Figure 3. Typical Barracuda 9 drive +5 V and +12 V current profile Power dissipation ST19171N/W/WC For drives with single-ended interface circuits, typical operating random read power dissipation is 14.7 watts (50 BTUs per hour) of DC power average at nominal voltages.
  • Page 34 Barracuda 9 Product Manual, Rev. C these temperatures. See Section 8.3.1. Continual or sustained operation at case temperatures above these values may degrade MTBF. To confirm that the required cooling for the Barracuda electronics and HDA is provided, place the drive in its final mechanical configuration, perform operations that represent typical drive usage and, after the temper- atures stabilize, measure the case temperature of the components listed in Table 3 (see notes [2] and [3]).

  • Page 35: Figure 4A. Location Of Pcb Components Listed In Table 3

    Barracuda 9 Product Manual, Rev. C ST19171N Drives ST19171DC Drives DYKX XYJX ST19171WD Drives ST19171WC Drives FYJX HYJX ST19171W Drives 2 . 0 1 . 0 0 " 0 " HDA Temp. Check Point GYJX Figure 4a. Location of PCB components listed in Table 3...

  • Page 36: Figure 4B. Location Of Pcb Components Listed In Table 3

    Barracuda 9 Product Manual, Rev. C ST19171N Drives ST19171DC Drives ABAJ EBAJ ST19171WD Drives ST19171WC Drives CBAJ DBAJ ST19171W Drives 2 . 0 1 . 0 0 " 0 " HDA Temp. Check Point BBAJ Figure 4b. Location of PCB components listed in Table 3...

  • Page 37: Relative Humidity

    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 con- tainer designed by Seagate. 6.4.2 Relative humidity The values below assume that no condensation on the drive occurs.

  • Page 38: 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 39: Air Cleanliness

    Barracuda 9 Product Manual, Rev. C Vibration occurring at these levels may degrade operational performance during the abnormal vibration period. Specified operational performance will continue when normal operating vibration levels are resumed. This assumes system recovery routines are available. c. Non-operating The limits of non-operating vibration apply to all conditions of handling and transportation.

  • Page 40: Mechanical Specifications

    Barracuda 9 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 the figure below. Refer to Figures 6, 7, and 8 for detailed mounting configuration dimensions.

  • Page 41: Figure 7. Mounting Configuration Dimensions For "W" And "Wd" Models

    Barracuda 9 Product Manual, Rev. C Notes: .050 in. (1.27mm) minimum clearance 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 42: Figure 8. Mounting Configuration Dimensions For "Wc" And "Dc" Models

    Barracuda 9 Product Manual, Rev. C Notes: .050 in. (1.27mm) minimum clearance 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 43: Defect And Error Management

    Barracuda 9 Product Manual, Rev. C Defect and error management The drive, as delivered, complies with this product manual. The read error rate and specified storage capaci- ties 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 systems error considerations (errors in communications between Initiator and the drive).

  • Page 44: Scsi Systems Errors

    Barracuda 9 Product Manual, Rev. C Table 4: Read and write retry count maximum recovery times Read retry Maximum recovery time Write retry Maximum recovery time count [1] per LBA (cumulative, msec) count [1] per LBA (cumulative, msec) 1942 12 (default) 2942 1384 2384 3384...

  • Page 45: Installation

    J2, J1-Auxiliary and J6. Suggested part number for the jumpers used on J2 is Molex 52747-0211(Seagate P/N 70935865). A bag with the two jumper plug types is shipped with the standard OEM drives.

  • Page 46: Figure 9. St19171N Option Select Jumper Connectors

    Barracuda 9 Product Manual, Rev. C Pin 1 Pin 2 Enable Terminator (default) Drive Delay Motor Start Front Enable Motor Start Jumper Plug Pin 1 Write Protect (enlarged to Disable SCSI Parity show detail) Reserved Pin 1 Term. Power from Drive (default) J6 [4] Term.

  • Page 47: Figure 10. St19171W/Wd Option Select Jumper Connectors

    Barracuda 9 Product Manual, Rev. C Pin 1 Pin 2 ST19171W/WD Delay Motor Start Enable Motor Start Drive Write Protect Front Disable SCSI Parity Jumper Plug Pin 1 Reserved (enlarged to show detail) ST19171W Enable Terminator (default) Pin 1 Term. Power from Drive (default) J6 [4] Term.

  • Page 48: Figure 11. St19171Wc/Dc Option Select Jumper Connectors

    Barracuda 9 Product Manual, Rev. C Drive Front Jumper Plug (enlarged to Pin 1 show detail) Pin 1 Pin 1 Pin 2 ST19171WC/DC SCSI ID = 0 (default) Delay Motor Start SCSI ID = 1 Enable Motor Start SCSI ID = 2 Write Protect SCSI ID = 3 Disable SCSI Parity...

  • Page 49: Notes For Figures 9, 10, And 11

    Barracuda 9 Product Manual, Rev. C 8.1.1 Notes for Figures 9, 10, and 11 Notes explaining the functions of the various jumpers on jumper header connectors J2, J1-Auxiliary 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 9 Product Manual, Rev. C 8.1.2 Function description J2 Jumpers Jumper Function Description (Applies only to “N” and “W” models) On-board (non-removable) terminator circuits are enabled. (Default) On-board (non-removable) terminator circuits are disabled. (Applies to all models) Spindle starts immediately after power up. (Default) Spindle does not start until a Start Unit command is received from the host.

  • Page 51: Drive Orientation

    Barracuda 9 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

    (‘F’) is applied to the fourth point. Note. Before mounting the drive in any kind of 3.5-inch to 5.26-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

    SCSI interface messages supported Table 6 lists the messages supported by the SCSI-2 and SCSI-3 modes of the Barracuda 9 family drives. ASA II is Seagate’s second generation of Advanced SCSI Architecture firmware. Table 6: SCSI messages supported by Barracuda 9 family drives...

  • Page 54: Scsi Interface Commands Supported

    Barracuda 9 Product Manual, Rev. C SCSI interface commands supported Table 7 lists the SCSI interface commands that are supported in the SCSI-2 and SCSI-3 modes of the drive. OEM standard drives are shipped set to operate in SCSI-2/SCSI-3 mode. Barracuda family drives can be changed back and forth between SCSI-1, SCSI-2, and SCSI-3 modes using the Change Definition command.
  • Page 55 Barracuda 9 Product Manual, Rev. C Table 7: Commands supported by Barracuda 9 family drive (continued) Supported by Command Name Command Code ESP SCSI-2/3 Mode select (same pages as Mode Y [2] Sense command, see below) Mode select (10) Mode sense Y [2] Caching parameters page (08h) Control mode page (0Ah)
  • Page 56 Barracuda 9 Product Manual, Rev. C Table 7: Commands supported by Barracuda 9 family drive (continued) Supported by Command Name Command Code ESP SCSI-2/3 Search data equal Search data high Search data low Seek Seek extended Send diagnostics Supported diagnostics pages (00h) Translate page (40h) Set limits Start unit/stop unit (start/stop spindle)

  • Page 57: Inquiry Data

    Barracuda 9 Product Manual, Rev. C 9.3.1 Inquiry data Table 8 following lists the Standard Inquiry command data that the drive returns to the initiator per the format given in the SCSI Interface Product Manual, part number 77738479, section 5.1.1.3. Table 8: Barracuda 9 family drive Standard Inquiry data Bytes...
  • Page 58 Barracuda 9 Product Manual, Rev. C Saved values are stored on the disk media using a Mode Select command. Only parameter values that are allowed to be changed can be changed by this method. “Changeable values” are defined below. Parameters in the saved values list that are not changeable by the Mode Select command get their values from the default values storage.
  • Page 59 Barracuda 9 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 (see SCSI Interface Product Manual, part number 77738479). Definitions: SAV = Saved values are stored on the disk media using a Mode Sense command. DEF = Default value;...
  • Page 60 Barracuda 9 Product Manual, Rev. C Bytes 00 01 02 03 04 05 06 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 SAV 1A 9A 0A 00 00 00 00 00 00 00 00 04 DEF 1A 9A 0A 00 00 00 00 00 00 00 00 04 CHG 1A 9A 0A 00 03 00 00 00...

  • Page 61: Scsi Bus Conditions And Miscellaneous Features Supported

    Barracuda 9 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 62: Synchronous Data Transfer

    SCSI interface connector, and the drive select and option select headers are shown. Details of the physical, electrical and logical characteristics are given in sections following, while the SCSI operational aspects of Seagate drive interfaces are provided in the SCSI Interface Product Manual, part num- ber 77738479.

  • Page 63: Figure 13. Physical Interface For "N" Model Drives

    Barracuda 9 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 13. Physical interface for “N” model drives...

  • Page 64: Figure 14. Physical Interface For "W" And "Wd" Model Drives (68-Pin J1 Scsi I/O Connector)

    Barracuda 9 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 14. Physical interface for “W” and “WD” model drives (68-pin J1 SCSI I/O connector) 80 Pin SCSI I/O and Power Connector...

  • Page 65: Scsi Interface Physical Description

    Barracuda 9 Product Manual, Rev. C 9.6.2 SCSI interface physical description The drives may be daisy-chained together or with other compatible SCSI devices. Both ends of the cable must be terminated. The “N,” “W,” and “WC” model drives implement single-ended drivers and receivers. All signals are common between all SCSI devices.
  • Page 66 Barracuda 9 Product Manual, Rev. C 9.6.3.1 Single-ended I/O circuits (“N,” “W,” and “WC” models) The maximum total cable length allowed with drives having single-ended I/O driver and receiver circuits depends on several factors. Table 12 lists the maximum lengths allowed for different configurations of drive usage.

  • Page 67: Mating Connectors

    Barracuda 9 Product Manual, Rev. C 9.6.4 Mating connectors Part numbers for connectors that mate with the various Barracuda 9 I/O connectors are given in the sections following. 9.6.4.1 Mating connectors for ST19171N model Use a non-shielded 50-conductor cable connector consisting of two rows of 25 female contacts with adjacent centers 100 mils apart.
  • Page 68 “SFF-8046 Specification for 80-pin connec- tor for SCSI Disk Drives.” Recommended mating 80-position PCB mount connectors: Straight-in (vertical) connector Hot plug version (with ground guide-pin) Seagate P/N: 77678703 Amp US P/N: 2-557103-1 787311-1...

  • Page 69: Figure 16. Scsi Daisy-Chain Interface Cabling

    Barracuda 9 Product Manual, Rev. C “N” Model “W” Model “WD” Model Drive Drive Drive Note: Do not mix “W” and “WD” model drives on the daisy chain. Terminator 2 through X SCSI devices [4] Pin 1 (check your adapter for Pin 1 location) SCSI ID 1 SCSI ID 7 [5] Host Adapter...

  • Page 70: Figure 17. Non-Shielded 50-Pin Scsi Device Connector

    Barracuda 9 Product Manual, Rev. C Insert mating cable connector here .370 .010 (9.398) Ref. (15.24) (10.67) Typ. (5.08) .065 x 45 Chamfer Typ. (1.65) Pin 1 .037 Ref. Typ. Typ. (.94) (6.60) .335 .010 (8.50) .100 (2.54) .025 +.001 Sq.

  • Page 71: Figure 18. Non-Shielded 68-Pin Scsi Device Connector

    Barracuda 9 Product Manual, Rev. C 3.650 .005 .346 .270 . 1 55 1.650 .3937 .600 .050 .0787 .200 .022 .020 .047 (15.24) .519 (13.18) (5.08) .100 Pos. 1.816 .315 .085 (2.54) (46.13) Pos. Position 1 x 45 chamfer (8.00) (2.16) .315 .010...

  • Page 72: Figure 19. Non-Shielded 80-Pin Scsi Connector, Used On "Wc" Model

    Barracuda 9 Product Manual, Rev. C Side View Section X–X .276 (7.00) .060 (1.52) .500 End View (12.70) .106 (2.70) Grounding Pins .052 .085 0.004 (1.32) 2 places .038 .004 (.97 0.10) 2.278 +.000 (57.87) –.006 –0.15 0.006 M Y M C L of Datum Y –Y–...
  • Page 73 Barracuda 9 Product Manual, Rev. C Table 13: Single-ended signal/contact assignments for ST19171N drives Connector Cable Connector Signal contact conductor contact Signal name [1] number [11] number [12] number [11] name [1] –DB0 –DB1 –DB2 –DB3 –DB4 –DB5 –DB6 –DB7 –DBP NC [10] TERMPWR...
  • Page 74 Barracuda 9 Product Manual, Rev. C Table 14: Single-ended wide cable assignments for ST19171W drives 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 –DB2 –DB3 –DB4...
  • Page 75 Barracuda 9 Product Manual, Rev. C Table 15: Wide differential P cable assignments (non-shielded connector) for ST19171WD drives 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 76 Barracuda 9 Product Manual, Rev. C Table 16: Wide, single connector, single-ended signal/contact assignments for ST19171WC drives Connector Connector Signal contact contact Signal name [1] number [12] number [12] name [1] +12 V 12 V GND +12 V 12 V GND +12 V 12 V GND +12 V...
  • Page 77 Barracuda 9 Product Manual, Rev. C Table 17: Wide, single connector, differential signal/contact assignments for ST19171DC drives Connector Signal contact Signal name number name 12 V 12 V GND 12 V 12 V GND 12 V 12 V GND 12 V MATED 1 RESERVED/NC [10] RESERVED/NC [10]...
  • Page 78 Barracuda 9 Product Manual, Rev. C Notes [ ] for Tables 13 through 17: See Section 9.7.1 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. Other cable types may be used to implement equivalent contact assignments. Connector contacts are on 0.050 inch (1.27 mm) centers.

  • Page 79: Electrical Description

    Barracuda 9 Product Manual, Rev. C Electrical description ST19171N and ST19171W 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 drivers. All of these models can be configured to provide the SCSI termination. ST19171WD models use differential interface signals and each of these must be terminated at each end of the total cable with 330 ohms to +5V and 330 ohms to ground with 150 ohms between each differential pair.

  • Page 80: Differential Drivers/Receivers

    Barracuda 9 Product Manual, Rev. C 9.7.2 Differential drivers/receivers Typical differential driver and receiver circuits used by ST19171WD drives are shown in Figure 21. The drive has no provisions for terminator circuits on differential I/O drives. Differential signals All differential interface signals consist of two lines denoted +SIGNAL and –SIGNAL. A signal is true when +SIGNAL is more positive than –SIGNAL, and a signal is false when –SIGNAL is more positive than +SIGNAL.

  • Page 81: Figure 21. Typical Differential I/O Line Transmitter/Receiver And 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 82: Terminator Requirements

    Barracuda 9 Product Manual, Rev. C Terminator requirements ST19171N and ST19171W drives Internal disc drive I/O termination consists of active circuits contained in an LSI module that is permanently mounted on the PCB. All single initiator/single target (non-daisy-chain) applications require you to terminate the initiator and drive.

  • Page 83: Disc Drive Scsi Timing

    Barracuda 9 Product Manual, Rev. C 9.10 Disc drive SCSI timing Table 18: Disc drive SCSI timing Waveform Waveform Description symbol [1] table [1] Typical timing Target select time (no arbitration) <1 µs Target select time (with arbitration) 4.5-1,2 2.31 µs Target select to command 4.5-1 3.33 µs...
  • Page 84 Barracuda 9 Product Manual, Rev. C Waveform Waveform Description symbol [1] table [1] Typical timing Data in byte transfer (parameter) 4.5-12 0.04 µs max. Data out byte transfer (parameter) 4.5-13 0.04 µs max. Next data in byte access (parameter) 4.5-12 0.10 µs Next data byte out access (parameter) 4.5-13...

  • Page 85: Seagate Technical Support Services

    Online technical support for Seagate products is available on CompuServe. To access our technical support forum, type go seagate . This forum provides information similar to that found on SeaBOARD. In addition, you can type questions or browse through previous questions and answers on the forum messages.
  • Page 86 . (Pacific time) Monday through Friday. Customer service centers Seagate direct OEM, Distribution, and System 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 87 Barracuda 9 Product Manual, Rev. C Index cache control prefetch/multi-segmented 11 cache operation 11 Numerics cache statistics page 44 caching parameters page 45 12 V current profile 22 caching write data 12 3rd party reserve command 45 capacities 7 unformatted 9 CDB 12 abort CE Marking 3...
  • Page 88 Barracuda 9 Product Manual, Rev. C DC power connector 52 electrical description 69 DC power requirements 21 electrical specifications 21 DCRT bit supported 44 electromagnetic compliance 3 dedicated landing zone 5 electromagnetic interference (EMI) 15 default 39 electromagnetic susceptibility 29 default mode parameter 35 EMC compliance 3 default values 47...
  • Page 89 Barracuda 9 Product Manual, Rev. C head and disc assembly 5 intermediate/good status 51 ground 42 internal data rate 9 head of queue tag internal drive characteristics 9 SCSI message 43 IP bit supported 44 high level format 35 host 39 host adapter 35 J1-auxiliary 35 host equipment...
  • Page 90 Barracuda 9 Product Manual, Rev. C mounting configuration dimensions wide differential P cable 65 "N" models 30 wide, single connector, differential 67 "W" and "WD" models 31 wide, single connector, single-ended 66 "WC" and "DC" models 32 power condition page 45 mounting orientation 41 power dissipation 23 MR heads 5...
  • Page 91 SCSI systems error management 34 surface stiffness 42 SCSI timing 73 synchronize cache command 46 SCSI-3 (Fast-20) interface 5 synchronized spindle Seagate support service 35 operation 51 search data equal command 46 synchronous data transfer 51 search data high command 46 periods supported 52 search data low command 46 synchronous data transfer req.
  • Page 92 Barracuda 9 Product Manual, Rev. C terminate I/O process SCSI message 43 zero latency read 51 terminator 35 zone bit recording 6 circuits 69 enable jumper TE 35 power 72 requirements 35 test unit ready command 46 TMC bit 44 tracks 9 transfer rate 10 translate page 45...
  • Page 94 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 83329030, Rev. C, Printed in USA...

This manual is also suitable for:

St19171wcSt19171nSt19171wdSt19171dc

Table of Contents