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Hard Drive: SEAGATE: ST9420AG MARATHON420 420MB 2.5"/SSL ATA2 FAST




S T 9 4 2 0 A G   M A R A T H O N 4 2 0    SEAGATE
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 2.5"/SUPERSLIMLINE    Cylinders        |  988|     |
Capacity form/unform   420/      MB        Heads           4|   16|     |
Seek time   / track  16.0/ 6.0 ms          Sector/track     |   52|     |
Controller           IDE / ATA2 FAST/ENHA  Precompensation
Cache/Buffer           120 KB              Landing Zone
Data transfer rate    5.000 MB/S int       Bytes/Sector      512
                     16.600 MB/S ext
Recording method     PRML                           operating  | non-operating
                                                  -------------+--------------
Supply voltage     5 V          Temperature *C         5 55    |    -40 70
Power: sleep          0.2 W     Humidity     %                 |
       standby        0.3 W     Altitude    km                 |
       idle           0.9 W     Shock        g        10       |    300
       seek           1.9 W     Rotation   RPM      4500
       read/write     2.0 W     Acoustic   dBA        24
       spin-up            W     ECC        Bit
                                MTBF         h     300000
                                Warranty Month        36
Lift/Lock/Park     YES          Certificates

Layout

SEAGATE ST9420AG MARATHON 420SL JUMPER SETTING

  +---------------------------------------------------------+
  |                                                         |XX
  |                                                         |XXI
  |                                                         |XXN
  |                                                         |XXT
  |                                                         |XXE
  |                                                         |XXR
  |                                                         |XXF
  |                                                         |XXA
  |                                                         |XXC
  |                                                         |XXE
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |  1
  |                                                         |XXJumper
  +---------------------------------------------------------+

Jumpers

SEAGATE ST9420AG MARATHON 420SL JUMPER SETTINGS

Jumper Setting
==============

 +--+  +Jumper--------Interface-----------------------------+  +--+
 |  +--+Bo oD   o o o o o o o o o   o o o o o o o o o o o o +--+  |
 |  |  |Ao oC   1 o o o o o o o o o o o o o o o o o o o o o |  |  |
 |  |  +--+-------------------------------------------------+  |  |
 |  +-----+----------------------------------------------------+  |
 +--------+-------------------------------------------------------+
          |
         o o    Drive is master; slave may be detected using DASP-
         o o    signal

         o X    Drive is master; Seagate slave drive present
         o X

         X o    Drive is slave; Seagate master drive present
         X o

         X X    Use CSEL pin grounding to differate master from slave
         X X

Install master/slave jumpers
----------------------------
In a two-drive system, you need to designate one drive as the master,
or drive 0, and the other drive as the slave, or drive 1. In a one-
drive system, configure the drive as a master (no jumpers installed).

Alternatively, you can configure the drive as a master or slave
using the cable select option. To use this option, the host system
and both drives must support cable select. Cable selection requires
a special daisy-chain cable that grounds pin 28 (CSEL) on one of its
two drive connectors. If you attach the drive to the grounded CSEL
connector, it becomes a master. If you attach the drive to the
ungrounded CSEL connector, it becomes a slave.

To configure an ST9420 drive for cable select, install both master/
slave jumpers.

Master/slave configuration
--------------------------
You must establish a master/slave relationship between two drives
attached to a single AT bus. You can configure a drive to become a
master or slave by setting the master/slave jumpers.

Alternatively, you can configure the drive as a master or slave using
the cable select option. This requires a specialized daisy-chain
cable that grounds pin 28 (CSEL) on one of its two drive connectors.
If you attach the drive to the grounded CSEL connector, it becomes a
master. If you attach the drive to the ungrounded CSEL connector, it
becomes a slave. To use this option, the host system and both drives
must support cable select and both drives must be configured for
cable select. To configure a Marathon 420sl for cable select, install
both master/slave jumpers.

For the host to recognize the slave drive using the DASP- signal, the
slave drive must assert the DASP- signal at power up, and the master
drive must monitor DASP- at power up.

Remote LED configuration
------------------------
The drive indicates activity to the host through the DASP- line (pin
39) on the ATA interface. This line may be connected to a drive
status indicator driving an LED at 5V. The line has a 30 mA nominal
current limit. To avoid potential damage to the drive, the host
should include a resistor in the line to the LED. This resistor
should have a minimum resistance of 470 ohms (1,000 to 3,000 ohms
recommended).

Install

SEAGATE ST9420AG INSTALLATION GUIDE

Notes on installation
=====================

Installation direction
----------------------

     horizontally                           vertically
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
                                   |  |     |           |     |  |
 +---------------------+           |  +-----+           +-----+  |
 +-+-----------------+-+           +--+                       +--+
   |                 |
   |                 |
   +-----------------+

The drive will operate in all axis (6 directions).

Mounting the drive
------------------
Mount the drive securely in the computer using M3X0.5 metric screws
in the four bottom mounting holes or the four side mounting holes.

You can mount the drive in any orientation. Be careful not to strain
or crimp the interface/power cable.

Caution. To prevent damage to the drive:

 - Be careful not to bend the drive connector pins, especially when
   plugging the drive into a fixed connector.

- Use mounting screws of the correct size and length.

 - Gently tighten the mounting screws_do not apply more than 3
   inch-pounds of torque.

- Do not insert mounting screws more than 0.15 inch.

 Note. This drive meets industry-standard MCC mounting specifications.
       When installing this drive in a fixed-mounting application, you
       must use MCC-compatible connectors and mounting hardware. If
       the mounting holes in your computer do not line up with the
       mounting holes on the drive, your computer may not be
       MCC-compatible.

 Attaching cables
 ----------------
 This drive is designed for a host computer that supplies interface
 signals and +5V power through a single 44-pin connector and cable.

1. Turn off the computer and remove the battery.

2. Put on a grounded wrist strap.

 3. Open your computer case. See your system manual for instructions.
    Caution. Opening the case may void your computer's warranty.

 4. Connect the 44-pin interface/power cable. Match pin 1 of the cable
    to pin 1 of the interface connectors on the drive and on the
    computer. Pin 1 is usually denoted by a stripe along one edge of
    the cable. The cable should be no longer than 18 inches (0.457
    meters).

    Caution. The printed-circuit cables used in laptop computers are
             very delicate. Be careful not to tear them.

Features

SEAGATE ST9420AG INSTALLATION GUIDE

Read before you begin
---------------------
Application. This drive uses the ATA interface and is designed for
IBM AT and compatible personal computers. It is intended for use with
UL-listed computers or similar products.

 Warning. Turn off the computer (and remove the battery if you have a
          notebook or laptop computer) before you open the case or
          touch any internal components.

 Caution. Special training or tools may be needed to service laptop
          and notebook computers. In some cases, opening the case
          may void your warranty.

Static discharge
Observe the following precautions:
- Before handling any components, put on a grounded wrist strap.

- Use antistatic padding on all work surfaces.

- Avoid static-inducing carpeted areas.

 - Keep the drive in its static-shielded bag until you are ready to
   complete the installation. Do not attach any cables to the drive
   while it is in its static-shielded bag.

- Handle the drive by its edges or frame.

- Do not touch the I/O connector pins or the circuit board.

Drive handling
--------------
The drive is extremely fragile_handle it with care.
Do not attach labels to any part of the drive.

Inspection
----------
After you are familiar with the handling precautions listed above,
inspect the drive. If it appears to be damaged, call your distributor
or dealer immediately.

Maintenance and repair
----------------------
Seagate drives do not require maintenance.
The head/disc assembly is sealed; if you break the seal, you void the
warranty. Seagate customer service centers are the only facilities
authorized to repair Seagate drives. Seagate does not sanction any
third-party repair facilities.

 Configuring the drive
 ---------------------
 1. Put on a grounded wrist strap. Wear the grounded wrist strap
    throughout the installation procedure.

 2. Install master/slave jumpers. In a two-drive system, you need to
    designate one drive as the master, or drive 0, and the other drive
    as the slave, or drive 1.

Configuring your computer
-------------------------
Before your computer can recognize a new drive, you must enter basic
information about the drive into the computer's longterm memory
(usually a battery-powered CMOS chip). The computer's basic
input/output system (BIOS) uses this information to control the flow
of data to and from the drive.

 Note. Some newer computers can automatically determine your drive
       type and configure themselves appropriately at startup. Read
       your system manual to determine whether this applies to your
       computer. If so, then skip ahead to "Formatting and
       partitioning the drive. If your computer cannot automatically
       determine your drive type, you must run a system setup program
       to specify the number of cylinders, heads and sectors for each
       drive in your system. This procedure is described on the
       following page. The table below lists cylinder, head and sector
       information for the Marathon 420sl.

       No. cylinders         988
       No. read/write heads  16
       No. sectors per track 52
       Total no. sectors     822,016
       Bytes per sector      512
       Capacity (Mbytes): BIOS calculated 400 Usable 420

To enter these drive specifications into your system BIOS, follow
these steps:

1. Turn on your computer.

 2. Run the system setup program. This program configures the system
    BIOS to recognize your drive. In some computers you run the system
    setup program by pressing special keys while the computer is
    booting up. In other computers, you can run the program from the
    DOS prompt. See your system manual for more information.

 3. Enter your drive specifications. Within the system setup program,
    there are three possible ways that you can enter your drive's
    specifications. These are listed below in order of increasing
    complexity.

   - Select a predefined drive type. Most system setup programs
     provide a long list of predefined drive types. Select a drive
     type with specifications that match those of your drive.

   - Specify a custom or user defined drive type. If the system setup
     program doesn't list a predefined drive type that matches your
     drive specifications, you may be able to define a custom or
     user defined drive type. You can then enter your drive
     specifications.

     When you enter drive specifications for a custom or user defined
     drive type, the setup program should display a drive capacity
     less than or equal to the BIOS calculated capacity.
     This value is slightly lower than the usable drive capacity.

    - Allow your drive to emulate or translate one of the predefined
      drive types. If none of the predefined drive types exactly
      matches your drive, and your system setup program does not allow
      you to specify a custom drive type, your drive may be able to
      emulate one of the predefined drive types. Select a predefined
      drive type that has a capacity as close as possible to, but not
      greater than, the BIOS calculated capacity of your drive.

 Note. If you emulate a drive type with a lower storage capacity than
       your drive, you limit the effective capacity of your drive. For
       example, a 350-Mbyte drive emulating a 300-Mbyte drive will be
       limited to 300 Mbytes of storage capacity.

       If you are not sure which drive type to select, try running the
       FINDTYPE.EXE utility program. This program is available from
       Seagate's Technical Support services (on the SeaBOARD computer
       bulletin board). FindType compares your drive's geometry with
       all geometries supported by your computer's BIOS. FindType can
       also determine whether an exact match exists between the drive
       geometry and the system BIOS. If there is no match, FindType
       selects the closest drive type supported by your computer's
       BIOS.

       The system setup program may request information on the drive's
       write precomp or landing zone. However, you do not need to
       enter any values, since your Seagate drive does not use these
       parameters.

 Caution. Write down the drive type that you have selected and any
          drive specifications that you have entered. Keep this
          information in a safe place. You will have to reenter this
          data if your CMOS battery fails.

Formatting and partitioning the drive
-------------------------------------
Caution. Formatting or partitioning a drive that contains data may
destroy all data on the drive. Before repartitioning or reformatting
a drive that contains data, make sure all data on that drive has been
safely backed up. Seagate Technology assumes no liability for lost
data.

Low-level formatting
--------------------
Seagate ATA Interface drives are low-level formatted at the factory
and do not require additional low-level formatting before use.

 Note. If you are installing only a single drive in your computer, you
       can use the DOS program SETUP.EXE (supplied with MS-DOS 5.0
       and above) to partition and format the drive. See your DOS
       manual for details. After you successfully run SETUP.EXE, your
       drive will be ready to use, and you can skip the partitioning
       and formatting steps below.

Partitioning
------------
The partitioning process subdivides a single disc drive into
partitions that behave as separate logical drives (labeled C, D, E,
etc.). You can also set up the entire disc as a single partition.

 1. Restart your computer. Boot up the computer using a diskette that
                           contains DOS system files.
 2. Run the FDISK program. Insert a DOS program diskette containing
                           the FDISK program into your diskette drive.
                           At the DOS prompt, type fdisk and press
                           ENTER. Then follow the directions on the
                           screen to create one or more partitions.
                           See your DOS manual for details. If you are
                           partitioning a drive that will be used to
                           boot the computer, make sure that the
                           primary partition is marked active.

High-level formatting
---------------------
High-level formatting verifies the information written by the
low-level format and creates file allocation tables used to catalog
and access files.

 Caution. Make sure that you know the correct drive letter for the
          partition you wish to format. Formatting a drive that
          contains data may destroy the data on that drive.

 1. Run the FORMAT program. Insert a DOS program diskette containing
                            the FORMAT program into your diskette
                            drive. At the DOS prompt, type format,
                            followed by the drive letter for the first
                            drive partition you want to format (for
                            example, format C:). Then, press ENTER.
                            Repeat this procedure to format each of
                            the new drive partitions you have created.
                            Consult your DOS manual for FORMAT command
                            options.

 Note. If you are formatting the drive partition that will be used to
       boot your computer (the "C" drive), copy the DOS system files
       to this drive. To do this, type /s after the format command
       (for example, format C: /s)

 2. Verify the drive capacity. After high-level formatting a drive,
                               you can verify the usable drive
                               capacity by running the DOS CHKDSK
                               utility program.

Storing and shipping your drive
-------------------------------
Keep your original box and packing materials for storing or shipping
your drive. The box has a Seagate Approved Package label. Shipping a
drive in an unapproved container voids the warranty. Call your
authorized Seagate distributor to purchase additional boxes.

General

SEAGATE ST9420AG INSTALLATION GUIDE

Installation troubleshooting
----------------------------
Before calling Seagate Technical Support, please read and consider
all the possibilities discussed on the following pages. The
suggestions presented here address the vast majority of installation
problems.

General troubleshooting procedures
----------------------------------
The following is a list of general troubleshooting procedures.
Solutions for specific problems are provided on subsequent pages.
Warning. Always turn off the computer before changing jumpers,
moving cables or touching any internal components.

 - Verify hardware compatibility. Check the documentation for your
   drive, host adapter and computer to confirm that these components
   are compatible.

 - Verify your hardware configuration. Check the documentation for
   your drive, host adapter and computer to confirm that all jumpers
   are set appropriately.

 - Check all cables. Make sure that all cables are securely connected.
   Printed circuit and ribbon cables are quite fragile. Check to see
   that they are not crimped or damaged. Make sure that pin 1 of the
   interface cable is connected to pin 1 of the interface connector
   on the drive and on the computer. Most ribbon cables have a stripe
   down one side to designate pin 1.

 - Check all cards. If your computer has expansion cards, check to see
   that they are inserted completely into their slots on the
   motherboard and are secured with appropriate mounting screws. Make
   sure that full-size (16-bit) cards are not plugged into half-size
   (8-bit) slots.

 - Verify the BIOS drive type. Make sure that you entered the correct
   drive type or translation geometry in the BIOS setup program. The
   drive capacity and number of sectors specified in the BIOS must not
   exceed the specifications. If the drive type is incorrect, you
   must rerun the system setup program. Then partition and high-level
   format the drive again.

 - Check for I/O address conflicts. To isolate an address conflict,
   first verify that the drive and host adapter are compatible with
   your system by disconnecting all other peripherals except the video
   card. Then install the drive and host adapter, and test the system.
   Next, install the other peripherals, one at a time, until the
   conflict reappears. After you have isolated the source of the
   address conflicts, you can resolve the conflict by changing the I/O
   address of the peripheral that appears to cause the conflict.

 - Check the power supply. The output of your power supply may not be
   sufficient to meet the power requirements of the new devices you
   have installed. If you are not sure whether your power supply meets
   your system requirements, consult your computer dealer or
   distributor.

 - Check your DOS version. You must use the same version of DOS (we
   recommend MS-DOS version 5.0 or later) throughout all phases of
   building and configuring your computer system.

 - Check for viruses. Use the latest version of a reliable virus-
   checking program to scan your computer's memory, hard discs and any
   suspect diskettes for viruses. Run the virus-checking program if
   you encounter inexplicable disc errors or

 - Try a warm boot. Press CTRL, ALT and DELETE simultaneously to
   reboot the computer without turning off the power. If a warm boot
   causes a previously unrecognized drive to become recognized, there
   may be a timing problem in which the drive fails to become ready
   before the host completes its power-on self-test. One possible
   solution is to power up your computer with its processor set at low
   speed (see your computer manual for details on setting processor
   speed). After the computer is up and running, return your processor
   to high speed or turbo mode. Another option is to warm-boot your
   computer after every power-on. You may also be able to solve this
   problem by upgrading your system BIOS.

At startup, the message "HDD controller failure" appears.
- Check jumper settings on all drives.

- Check all cards and cables

The dealer partitioned and high-level formatted the drive for you
in the store. Later, you installed the drive and it does not work.

- Reboot the computer and make sure the drive spins up.

- Check all cables.

- Check the power supply.

 - Check your DOS version. Call your dealer to make sure the DOS
   version the dealer used to partition and high-level format the
   drive is the same as the version you have installed on your
   computer.

 - Verify the BIOS drive type. When you run the system setup program
   on your computer, you must specify the same BIOS drive type or
   translation geometry that the dealer used.

- Check for memory conflicts.

- Check for viruses.

During the FDISK program, you get an error message warning of an
attempt to write to track 0 or to the boot sector; the message may
also suggest that a virus is present.

 - This occurs in systems having a virus-protection scheme that does
   not allow programs to modify the boot sector of the disc. See your
   system manual for details. To avoid the problem, run the system
   setup program and turn off the virus-protection option. Then exit
   system setup and run the FDISK and FORMAT programs. After all
   drive partitions are formatted, use the system setup program to
   turn virus protection on again.
   During the FDISK program, the computer hangs or fails to create or
   save the partition record.

- Check all cables.

 - The FDISK program on your DOS utilities diskette may be corrupted.
   Try running the program from a different diskette.

 - Check to see if you are using a version of MS-DOS prior to version
   4.0. If so, upgrade to MS-DOS version 5.0 or later.

 - Try another drive type or translation geometry. Sometimes the host
   BIOS does not accept a particular translation geometry even though
   that geometry is listed as an option during system setup.

 - Make sure that the host adapter is not assigned an interrupt that
   is already in use by another device. Modify the interrupt jumpers
   if necessary.

During the FDISK program, the error message, "No Fixed Disk
Present," appears.

- Check all cables.

- Check the power supply.

- Reboot the computer and make sure the drive spins up.

- Verify the BIOS drive type.

- Check for I/O address conflicts.

During high-level formatting, the drive keeps finding hard errors
and reporting the following message: "Attempting to recover
allocation units. . ."

 - This is normal with some versions of DOS. The drive will format
   normally. However, after formatting the drive, you may want to run
   a third-party surface-scan program to check for bad sectors.

During high-level formatting, the drive does not format to full
usable capacity.

 - Verify the BIOS drive type. Your drive's formatted capacity is
   limited to the capacity of the BIOS geometry you selected. If your
   BIOS does not offer a geometry that takes advantage of the full
   capacity of the drive, and a user-defined drive type is not
   available, use a third-party partitioning utility.

 - Run FDISK again and make the partitions smaller. Make sure you are
   using MS-DOS version 5.0 or later or equivalent.

At startup, the messages, "Disk Boot Failure," "Non-System Disk," or
"No ROM Basic - SYSTEM HALTED," appear.

 - Run the FDISK program and make sure the primary partition is marked
   active.

- Check all cables.

- Check your DOS version.

 - Reinstall the DOS system files onto the hard disc using the SYS
   command (see your DOS manual).

- Check for viruses.

During operation, the system error message, "Drive not Ready,"
appears.

- Check all cables.

- Check the power supply.

- Reboot the computer and make sure the drive spins up.

Compatibility notes

 - The Marathon 420sl conforms to the ATA interface specifications.
   The host system BIOS must provide support for the ATA interface
   command set. For a detailed description of the ATA commands
   implemented by this drive, see the Seagate Marathon 420sl Product
   Manual and the Draft Proposed ATA-2 Standard.

 - In accordance with ATA specifications, the system BIOS must reset
   any emulation/translation parameters after a hard reset.

 - In some configurations, a Marathon 420sl may supply up to 16 bytes
   of error correction code (ECC) with the Read Long and Write Long
   commands. Depending on the drive type, your system BIOS may look
   for 4 bytes of ECC. If your system BIOS expects 4 bytes of ECC and
   the drive supplies a different number of bytes, some drive
   diagnostic programs may fail, typically resulting in time-out
   errors. Consult your computer documentation or call your computer
   dealer or manufacturer for information on configuring your computer
   to receive more than 4 bytes of ECC.

 - Some older drive diagnostic programs may incorrectly report an
   ECC-detection failure when analyzing a Marathon 420sl. This occurs
   because the drive hardware corrects the data automatically,
   avoiding the error rather than reporting it. Such a report does not
   indicate a drive malfunction.













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