Seagate Decathlon 850 Product Manual
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Seagate Decathlon 850 Product Manual

Ata interface drive
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Decathlon 850
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ATA Interface Drive
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Product Manual
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Summary of Contents for Seagate Decathlon 850

  • Page 1 ..Decathlon 850 ........
  • Page 3 ........Decathlon 850 ........
  • Page 4 Publication Number: 36326-001, Rev. A, July 1995 Supersedes Publication Number 36279- xxx Seagate, Seagate Technology and the Seagate logo are registered trademarks of Seagate Technology, Inc. Decathlon is a trademark of Seagate Technology, Inc. Other product names are trademarks or reg- istered trademarks of their owners.

  • Page 5: Table Of Contents

    Decathlon 850 ATA Product Manual, July 1995 Contents Introduction ......1 1.0 Specifications ......3 1.1 Formatted capacity .
  • Page 6 Decathlon 850 ATA Product Manual, July 1995 2.2 I/O connector ......16 2.3 Power connector ..... . . 16 2.4 Options jumper block (J8) .
  • Page 7 Decathlon 850 ATA Product Manual, July 1995 Figures Figure 1. Typical startup current profile ....7 Figure 2. ATA interface connector ....16 Figure 3.

  • Page 9: Introduction

    Decathlon 850 ATA Product Manual, July 1995 Introduction This manual describes the functional, mechanical and interface specifi- cations for the Decathlon 850 hard disc drive. The drive is referred to throughout this manual by its model number, ST5850A. The ST5850A is a high-capacity, high-performance, energy-efficient drive that comes in the mini 3.5-inch form-factor.
  • Page 10 Decathlon 850 ATA Product Manual, July 1995 • Available software driver that provides expanded 32-bit disk access support for Windows Performance • Multiword DMA modes 0, 1 and 2 and PIO modes 0,1, 2, 3 and 4 • Multiple block read/write •...

  • Page 11: Specifications

    Decathlon 850 ATA Product Manual, July 1995 1.0 Specifications The Seagate ST5850A comes with either of two printed circuit boards. The drives are referred to as Type A and Type B throughout this manual. This specification applies to both drives unless otherwise noted.

  • Page 12: Physical Organization

    Total sectors 833,616 834,374 Formatted capacity (Mbytes) 426.8 427.2 1.2.0.2 Available software driver The ST5850A is available with a software driver to surpass the 528- Mbyte barrier. Ask your Seagate representative for more information. 1.3 Physical organization ST5850A Read/write heads Discs...

  • Page 13: Functional Specifications

    Decathlon 850 ATA Product Manual, July 1995 1.4 Functional specifications ST5850A Interface Zone Bit Recording method RLL (1,7) External data burst transfer rate: DMA mode 2 (Mbytes per sec) 16.6 PIO mode 4 (Mbytes per sec) 16.6 Internal data-transfer rate 32.45 to 61.65...

  • Page 14: Seek Time

    Decathlon 850 ATA Product Manual, July 1995 1.6 Seek time Seek time is the interval between the time the actuator begins to move and the time the head has settled over the target track. Seek time is a statistical average of at least 10,000 measurements of seek time. All measurements for maximum values are taken under nominal conditions of temperature and voltage with the drive mounted horizontally.

  • Page 15: Power-Up Sequence

    Decathlon 850 ATA Product Manual, July 1995 Amps Seconds Figure 1. Typical startup current profile 1.8.1 Power-up sequence 1. Power is applied to the drive. 2. After a delay, the startup current is applied and the spindle begins to turn.

  • Page 16: Auto-Park

    Decathlon 850 ATA Product Manual, July 1995 1.8.3 Auto-park Upon power-down, the read/write heads automatically move to the shipping zone. The heads park inside the maximum data cylinder and the magnetic actuator-lock engages. When power is applied, the heads recalibrate to track 0.

  • Page 17: Voltage Tolerance

    Decathlon 850 ATA Product Manual, July 1995 • Spinup. Spinup mode is entered from the Standby mode. The drive brings the spindle and discs up to operating speed. Power in this mode is defined as the peak power after starting spinup.

  • Page 18: Environmental Specifications

    Decathlon 850 ATA Product Manual, July 1995 1.10 Environmental specifications 1.10.1 Ambient temperature 5 ° to 55 ° C (41 ° to 131 ° F) Operating –40 ° to 70 ° C (–40 ° to 158 ° F) Nonoperating 1.10.2 Temperature gradient 10 °...

  • Page 19: Acoustics

    Decathlon 850 ATA Product Manual, July 1995 shock or vibration episode. When normal operating shock levels resume, the drive meets its performance specifications. Operating Abnormal Nonoperating Shock 2 Gs 10 Gs 75 Gs 5–22 Hz vibration 0.020-inch 0.030-inch 0.160-inch displacement...

  • Page 20: Agency Listings

    Federal Communications Commission authorization, verification or cer- tification of the device is required. Seagate Technology, Inc. has tested these drives in an enclosure as described above to ensure that the total assembly (enclosure, disc drive, motherboard, power supply, etc.) does comply with the limits for a Class B computing device, pursuant to Subpart J of Part 15 of the FCC rules.
  • Page 21 Decathlon 850 ATA Product Manual, July 1995 sion: How to Identify and Resolve Radio-Television Interference Prob- lems. This booklet is available from the Superintendent of Documents, US Government Printing Office, Washington, DC 20402. Refer to publi- cation number 004-000-00345-4. Note This digital apparatus does not exceed the Class B limits for radio...

  • Page 23: Configuring And Mounting The Drive

    Decathlon 850 ATA Product Manual, July 1995 2.0 Configuring and mounting the drive This section contains the specifications and instructions for configuring and mounting the drive. The drive may come configured with either of two printed circuit boards. This manual distinguishes the drives as Type A and Type B.

  • Page 24: I/O Connector

    Decathlon 850 ATA Product Manual, July 1995 2.2 I/O connector The ST5850A uses a 40-pin, male I/O connector with two rows of twenty pins each. The even-numbered pins are closest to the printed circuit board’s edge. Pin 1 is near the 4-pin power connector. Pin 20 is removed for keying purposes.

  • Page 25: Options Jumper Block (J8)

    The ST5850A is shipped configured to work with other drives that use the standard ATA master/slave timing protocol. Some drives use the signal differently. This setting allows the Seagate drive to communicate with those drives as the slave only. Try using this...

  • Page 26: Figure 3. Type A Connectors

    Decathlon 850 ATA Product Manual, July 1995 Options jumper block (J8) pin 1 J4 pin 1 J4. Interface connector J3. Standard power connector Circuit board +5V return +12V return +12V Figure 3. Type A connectors...

  • Page 27: Figure 4. Type A Configuration Settings

    Decathlon 850 ATA Product Manual, July 1995 Options jumper block (J8) Circuit board side up Spares One drive only Drive is master; slave is present Drive is slave when another drive is present; Master/slave timing protocol. Makes drive compatible with some drives as a slave.

  • Page 28: Figure 5. Type B Connectors

    Decathlon 850 ATA Product Manual, July 1995 Options jumper block pin 1 J4 pin 1 J4. Interface connector J3. Standard power connector Circuit board +5V return +12V return +12V Figure 5. Type B connectors...

  • Page 29: Figure 6. Type B Configuration Settings

    Decathlon 850 ATA Product Manual, July 1995 Options jumper block Circuit board side up Spares One drive only Drive is master; slave is present Drive is slave Cable select Remote LED connection pin 9 (–), pin 10 (+) Dual-drive emulation Note.

  • Page 30: Dual-Drive Emulation

    The jumper block is designed to accept a 2-mm connector. It may be necessary for you to replace the current connector on the LED cable. Use Seagate part number 13211-001 or an equivalent for the replacement jumper.

  • Page 31: Mounting The Drive

    Decathlon 850 ATA Product Manual, July 1995 Slave Line 28 is open Master Pin 28 is grounded at computer Computer Figure 7. Connecting cable-selected devices 2.5 Mounting the drive You can mount the drive in any orientation. Mount it securely in the computer using either the bottom or side mounting holes as described below.

  • Page 32: Figure 8. Mounting Dimensions

    Decathlon 850 ATA Product Manual, July 1995 In the following figure, all dimensions are in inches and millimeters (mm). Six 6-32 UNC-2B threaded holes Max screw insertion depth: 0.20 inches 0.748 max (19.000) 2.362 ± 0.010 0.250 ± 0.010 (59.995. ± 0.254) (6.350 ±...

  • Page 33: Ata Interface

    Commands and features with specific application for the drive are also discussed in this section. For more information on Seagate’s implemen- tation of the ATA interface and commands, see the Seagate ATA Interface Reference Manual, publication number 36111- xxx .

  • Page 34: Figure 9. Ata Interface Connector Pin Assignments

    Decathlon 850 ATA Product Manual, July 1995 Drive Host Reset – Host Reset Ground Ground Host Data Bus Bit 7 Host Data Bus Bit 8 Host Data Bus Bit 6 Host Data Bus Bit 9 Host Data Bus Bit 5...

  • Page 35: Command Set

    This section lists all of the ATA commands the ST5850A uses. Com- mands whose implementation is specific for the drive are discussed in this manual. For information on Seagate’s implementation on the other supported commands, refer to the Seagate ATA Interface Reference Manual , publication number 36111- xxx .
  • Page 36 Decathlon 850 ATA Product Manual, July 1995 continued from previous page Parameters used Command Command name code (in hex) FR SC SN CY DH Idle and Set Idle Timer Idle Immediate 95, F8, E1 Initialize Drive Parameters Read DMA C8, C9 —...

  • Page 37: Identify Drive Command (Ec H )

    Decathlon 850 ATA Product Manual, July 1995 3.2.1 Identify Drive command (EC The parameters for the drive are listed in the table below. The Seagate ATA Interface Reference Manual , publication number 36111- xxx , de- scribes the Identify Drive command in detail.
  • Page 38 Decathlon 850 ATA Product Manual, July 1995 continued from previous page Word Description Value Maximum Sectors 8020 R/W Multiple supported; per interrupt per R/W 32 sectors per block Multiple command Double word I/O 0000 Not supported Capabilities 0B01 IORDY, DMA, LBA...

  • Page 39: Set Features Command (Ef H )

    Decathlon 850 ATA Product Manual, July 1995 Word Description Value Minimum PIO 120 nsec transfer with IORDY Reserved xxxx 69–127 xxxx Seagate-reserved 128–159 160– 255 Reserved xxxx 3.2.2 Set Features command (EF The Set Features command (command code EF ) allows the user to enable and disable the multisegmented cache features and to identify the transfer modes the drive uses.
  • Page 40 Decathlon 850 ATA Product Manual, July 1995 3.2.2.1 Multisegmented cache buffer The drive uses a 256-Kbyte multisegmented cache buffer to improve performance by eliminating access times under certain conditions. Read look-ahead. The drive uses the read segments to store additional logical sectors, after the last requested sector, into a buffer before the computer requests the additional sectors.

  • Page 41: Sleep Command (99 H , E6 H )

    Decathlon 850 ATA Product Manual, July 1995 Data-transfer mechanism Transfer-types value Mode Data Mechanism name Lower 3 bits value Upper 5 bits PIO Flow Control Transfer 00001 Mode: Set PIO Mode = 1 PIO Flow Control Transfer 00001 Mode: Set PIO Mode = 2...

  • Page 43: Appendix. Timing Diagrams

    Decathlon 850 ATA Product Manual, July 1995 Appendix. Timing diagrams Without IORDY, the drive operates at programmed I/O timing specifica- tions, as shown below. Address valid DIOR− and DIOW− Write data valid Read data valid IOCS16− Figure 10. Programmed I/O timing without IORDY...

  • Page 44: Figure 11. Programmed I/O Timing With Iordy

    Decathlon 850 ATA Product Manual, July 1995 When using IORDY, the drive operates at programmed timing specifica- tions, as shown below. Address valid Address valid IOCS16− IOCS16− DIOR− or DIOW− DIOR− or DIOW− IORDY IORDY Write data valid Write data valid...

  • Page 45: Figure 12. Multiword Dma Timing

    Decathlon 850 ATA Product Manual, July 1995 The drive operates at multiword DMA mode 2 timing specifications, as shown below. DMARQ DMACK− DIOR− or DIOW− Read data valid Write data valid Figure 12. Multiword DMA timing Time Description Cycle time 120 nsec —...
  • Page 48 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066, USA Publication Number: 36326-001, July 1995, Printed in USA...

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