Seagate ST3780A Product Manual
  1. Manuals
  2. Brands
  3. Seagate Manuals
  4. DC Drives
  5. ST3780A
  6. Product manual

Seagate ST3780A Product Manual

At interface drives
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . .
Medalist Family:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . .
ST3780A, ST31220A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . .
AT Interface Drives
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . .
Product Manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . .

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the ST3780A and is the answer not in the manual?

Questions and answers

Related Manuals for Seagate ST3780A

Summary of Contents for Seagate ST3780A

  • Page 1 ..ST3780A, ST31220A ........
  • Page 3 ..ST3780A, ST31220A ........
  • Page 4 , Seagate Technology ® and the Seagate logo are registered trademarks of Seagate Technology, Inc. Medalist™ is a trademark of Seagate Technology, Inc. Other product names are trademarks or regis- tered trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications.

  • Page 5: Table Of Contents

    1.1 Formatted capacity ..... . . 1 1.1.1 ST3780A configurations ....2 1.1.2 ST31220A configurations .
  • Page 6 Medalist Family AT Product Manual, Rev. A 1.13 FCC verification ..... . 12 2.0 Configuring and mounting the drive ... . . 15 2.1 Handling and static-discharge precautions .
  • Page 7 Medalist Family AT Product Manual, Rev. A Figures Figure 1. Typical startup current profile ... . . 11 Figure 2. AT interface connector ....16 Figure 3.

  • Page 9: Specifications

    Medalist Family AT Product Manual, Rev. A 1.0 Specifications 1.1 Formatted capacity The drive was low-level formatted at the factory. You cannot low-level format it. The drive was configured in translation mode at the factory. You can verify the number of cylinders, sectors per track and heads, and the total number of sectors by using the Identify Drive (EC ) command.

  • Page 10: St3780A Configurations

    Medalist Family AT Product Manual, Rev. A 1.1.1 ST3780A configurations Cylinders 1,399 Heads Sectors Total sectors 1,410,192 1,410,864 Formatted capacity (Mbytes 722.02 722.36 1. One Mbyte equals one million bytes. 1.1.2 ST31220A configurations Cylinders 2,099 Heads Sectors Total sectors 2,115,792...

  • Page 11: Functional Specifications

    Medalist Family AT Product Manual, Rev. A 1.2 Functional specifications Interface Zone Bit Recording method RLL (1,7) External data burst transfer rate, 16.6 DMA Mode 2 (Mbytes per sec) External data burst transfer rate, 16.6 PIO Mode 4 (Mbytes per sec) Internal data transfer rate 27.92 to 47.24 (Mbits per sec)

  • Page 12: Seek Time

    Medalist Family AT Product Manual, Rev. A 1.3 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 true statistical average of at least 5,000 measurements of seek time. All measurements are taken under nominal conditions of temperature and voltage with the drive mounted horizontally.

  • Page 13: Start/Stop Time

    Medalist Family AT Product Manual, Rev. A 1.4 Start/stop time Within 20 seconds after DC power is applied, the drive is ready. Within 15 seconds after DC power is removed, the drive spindle stops rotating. 1.5 Typical power-up and power-down sequence The typical power-up and power-down sequences assist you in evaluat- ing the drive’s performance;...

  • Page 14: Reliability

    Medalist Family AT Product Manual, Rev. A 1.6 Reliability Read error rates are measured with automatic retries and data correction with ECC enabled and all flaws re-allocated. The mean time between failures (MTBF) is measured at nominal power at sea level and an ambient temperature of 40 °...

  • Page 15: Altitude

    Medalist Family AT Product Manual, Rev. A 1.8.3 Altitude Operating –1,000 ft to 10,000 ft (–305 m to 3,048 m) Nonoperating –1,000 ft to 40,000 ft (–305 m to 12,192 m) 1.8.4 Relative humidity Operating 8% to 80% noncondensing Maximum wet bulb 26 ° C (79 ° F) Maximum operating 10% per hour gradient...

  • Page 16: Dc Power

    The level of drive activity for each power- management mode is described below. You can customize the power-management modes using the AT inter- face commands that control the power modes. These commands are described in the Seagate ATA Interface Reference Manual , publication number 36111- xxx .

  • Page 17: Idle And Standby Modes

    • The computer can send one of the Idle commands or the Standby commands. All of the commands that put the drive into the Idle or Standby mode are listed in the Seagate ATA Interface Reference Manual. • The idle timer or the standby timer counts down to zero.

  • Page 18: Power Consumption

    Medalist Family AT Product Manual, Rev. A • Idle. The heads are parked in the shipping zone. The spindle is spinning, the cache buffer remains enabled and the drive accepts all commands and returns to the Seeking or Read/write modes when it receives a command that requires disc access.

  • Page 19: Agency Listings

    Medalist Family AT Product Manual, Rev. A The startup current profile of each drive is unique. A typical startup current profile is shown in Figure 1. Amps Seconds Figure 1. Typical startup current profile Power is applied to the drive. After a delay, the startup current is applied and the spindle begins to turn.

  • Page 20: Fcc Verification

    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 Medalist Family AT Product Manual, Rev. A If necessary, you should consult your dealer or an experienced radio/tele- vision technician for additional suggestions. You may find helpful the following booklet prepared by the Federal Communications Commission: How to Identify and Resolve Radio-Television Interference Problems. This booklet is available from the Superintendent of Documents, US Government Printing Office, Washington, DC 20402.

  • Page 23: Configuring And Mounting The Drive

    Medalist Family AT Product Manual, Rev. A 2.0 Configuring and mounting the drive This section contains the specifications and instructions for configuring and mounting the drive. 2.1 Handling and static-discharge precautions After you unpack the drive, and before you install it in a system, be careful not to damage it through mishandling.

  • Page 24: I/O Cable And Connector

    Medalist Family AT Product Manual, Rev. A 2.2 I/O cable and connector The I/O connector is a 40-pin connector. The even pins are next to the edge of the printed circuit board; the odd pins are away from the printed circuit board.

  • Page 25: Remote Led Connection

    Section 2.5. 2.4.1 Jumper sizes The jumper blocks use 0.1-inch configuration jumpers. Use Seagate part number 10562-001 or an equivalent. You may use the spare jumpers shipped with the drive on any jumper block. The positions of these jumpers are shown in Figure 3 on page 18.

  • Page 26: Figure 3. Configuration Jumpers

    Medalist Family AT Product Manual, Rev. A J8. Options jumper block J5. Master/slave jumper block Circuit Circuit board board One drive only Spare — as shipped Spare — as shipped Cable select Drive is slave Remote LED connection Drive is master with pin 13 (−), pin 14 (+) slave present Cable select.

  • Page 27: Dual-Drive Emulation Jumper Block J6

    Under dual-drive emulation, capacities are as follows: for the ST31220A, each subdrive has a capacity of 528 Mbytes for a total of 1,056 Mbytes; for the ST3780A, each drive has a capacity of 360 Mbytes for a total of 720 Mbytes.

  • Page 28: Cable Select Option

    Medalist Family AT Product Manual, Rev. A 2.5 Cable select option If your computer and both of your drives support cable select, you can use the cable select option to determine the master and slave. To configure your drives using cable select, you need to install jumpers and use a special cable-select cable as follows: •...

  • Page 29: Mounting The Drive

    Medalist Family AT Product Manual, Rev. A 2.6 Mounting the drive You can mount the drive in any orientation. Note. If you format the drive before mounting it in the computer, it is best to format it in the same physical orientation it will have when it is mounted.

  • Page 30: Figure 5. Mounting Dimensions

    Medalist Family AT Product Manual, Rev. A In the following figure, all dimensions are in inches and millimeters (mm). 1.00 (25.40) max Six 6-32 UNC-2B threaded holes Max screw insertion depth: 0.20 inch 2.362 ± 0.010 0.250 ± 0.010 (59.944 ± 0.254) (6.350 ±...

  • Page 31: At Interface

    Some commands, as mentioned in the text, supplement the standard ATA commands. For a complete description of all AT interface commands, refer to the Seagate ATA Interface Reference Manual , part number 36111- xxx . Additional information on Fast ATA-related features is provided by the Small Form Factor specification, SFF-8011 Rev 1.1, September 18, 1993.
  • Page 32 Medalist Family AT Product Manual, Rev. A Parameters used Command Command name code (in hex) FR SC SN CY DH Active and Set Idle Timer Active Immediate Check Idle Mode Check Power Mode 98, E5 Execute Drive Diagnostics Format Track Identify Drive Idle 97, E3...

  • Page 33: Identify Drive Command (Ec H )

    Medalist Family AT Product Manual, Rev. A 3.1.1 Identify Drive command (EC The parameters for these drives 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 34 Medalist Family AT Product Manual, Rev. A 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 supported Reserved 0000...

  • Page 35: Set Features Command (Ef H )

    Minimum PIO 120 nsec transfer with IORDY xxxx Reserved 69–127 xxxx Seagate-reserved 128–159 160– 255 Reserved xxxx 3.1.2 Set Features command (EF The host uses the Set Features command (command code EF ) to establish parameters that affect the execution of certain drive features.
  • Page 36 Medalist Family AT Product Manual, Rev. A 3.1.2.1 PIO and DMA Data Transfer Modes You can use the Set Features command to set the type of data-transfer mechanism and transfer mode that the drive uses. To do this: 1. 1. Write Set Features command value 03 (Set Data Transfer mode) to the Features register.

  • Page 37: Sleep Command (99 H , E6 H )

    3.2 AT Interface connector pin assignments The signal name and signal direction for each I/O connector pin is described in Figure 6 on page 30. See the Seagate ATA Interface Reference Manual , publication number 36111- xxx , for a complete de- scription of each pin.

  • Page 38: Figure 6. At Interface Connector Pin Assignments

    Medalist Family AT Product Manual, Rev. A 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 DD10 Host Data Bus Bit 10 Host Data Bus Bit 4...

  • Page 39: Appendix. Timing Diagrams

    Medalist Family AT Product Manual, Rev. A 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 7. Programmed I/O timing without IORDY Time Description Cycle time...

  • Page 40: Figure 8. Programmed I/O Timing With Iordy

    Medalist Family AT Product Manual, Rev. A When using IORDY, the drive operates at programmed timing specifica- tions, as shown below. Address valid IOCS16− DIOR− or DIOW− IORDY Write data valid Read data valid Figure 8. Programmed I/O timing with IORDY Time Description Cycle time...

  • Page 41: Figure 9. Multiword Dma Timing

    Medalist Family AT Product Manual, Rev. A 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 9. Multiword DMA timing Time Description Cycle time 120 nsec —...
  • Page 44 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066, USA Publication Number: 36260-001, Rev. A, Printed in USA...

This manual is also suitable for:

St31220a

Table of Contents